iOS开发中常用的方法
iOS开发中常用的方法
系统弹窗:
过期方法: UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"确认报价" message:@"报价不可修改" delegate:nil cancelButtonTitle:@"好的" otherButtonTitles: nil]; // 显示出来 [alertView show]; 新方法: UIAlertController* alter = [UIAlertController alertControllerWithTitle:@"注销账户" message:nil preferredStyle:UIAlertControllerStyleActionSheet]; UIAlertAction* action1 = [UIAlertAction actionWithTitle:@"确认退出" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {//填写处理逻辑 }]; UIAlertAction* action2 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {//填写处理逻辑 }]; [alter addAction:action1]; [alter addAction:action2]; //弹出选择框 [self presentViewController:alter animated:YES completion:nil];
定时器:
延迟调用方法一: [self performSelector:@selector(nextQuestion:) withObject:nil afterDelay:2.0]; 延迟调用方法二: dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ //需要调用的方法 }); 定时器一:(精确度一般): NSTimer *timer = [NSTimer timerWithTimeInterval:2.0 target:self selector:@selector(方法名) userInfo:nil repeats:YES]; NSRunLoop *runLoop = [NSRunLoop mainRunLoop]; [runLoop addTimer:timer forMode:NSRunLoopCommonModes]; 定时器二:(精确度高): //1.创建CADisplayLinkCADisplayLink *link = [CADisplayLink displayLinkWithTarget:self selector:@selector(方法名)]; //2.添加到运行循环[link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
计算控件尺寸:
- (CGSize)stringSize:(NSString *) string andMaxSize:(CGSize)maxSize andFontNum:(NSInteger)fontNum{ // 最大尺寸 NSDictionary *dict = @{NSFontAttributeName : [UIFont systemFontOfSize:fontNum] }; CGRect labelFrame = [string boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil]; // 获取 size并返回return labelFrame.size; }
通知相关:
发送通知NSNotificationCenter* center = [NSNotificationCenter defaultCenter];[center postNotificationName:@"OpenButtonNotification" object:nil userInfo:@{@"headerView":self}]; 接收通知NSNotificationCenter* center = [NSNotificationCenter defaultCenter];[center addObserver:self selector:@selector(方法名:) name::@"OpenButtonNotification" object:nil]; 注销通知 -(void)dealloc{[[NSNotificationCenter defaultCenter] removeObserver:self]; }
TableView相关:
自动行高(需要配合autolayout自动布局) self.tableView.estimatedRowHeight = 200; //预估行高 self.tableView.rowHeight = UITableViewAutomaticDimension; tableViewCell左滑功能 //tableView向左滑的功能 -(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{ self.tableView.editing = !self.tableView.editing;ChangeInfosController* changeInfo = [[ChangeInfosController alloc]init]; [self.navigationController pushViewController:changeInfo animated:YES]; } //修改左滑的文字 -(NSString*)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath{ return @"编辑"; } 取消重用 NSString*CellIdentifier = [NSStringstringWithFormat:@"Cell%ld%ld", (long)[indexPath section], (long)[indexPath row]]; //以indexPath来唯一确定cell FillOrderCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; //出列可重用的cell if (cell == nil) { cell = [[FillOrderCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
CollectionView相关:
自定义layout的三个步骤(流水布局): 一、准备数据,并保存到布局对象数组 - (void)prepareLayout{ [super prepareLayout]; //准备item的数据 //定义数组用来保存每个item的frameNSMutableArray* marr = [NSMutableArray array];//给每个item布局 for (int i = 0; i < self.clothesInfos.count; i ++) { //创建布局对象 NSIndexPath* indexPath = [NSIndexPath indexPathForRow:i inSection:0]; UICollectionViewLayoutAttributes* attr = [UICollectionViewLayoutAttributes layoutAttributesForCellWithIndexPath:indexPath]; //取出数据 ClothesModel* model = self.clothesInfos[i];//计算frameattr.frame = CGRectMake(itemX, itemY, itemWidth, itemHeight);//保存数据 [marr addObject:attr];}//计算footView的frameNSIndexPath* footPath = [NSIndexPath indexPathForRow:0 inSection:0]; UICollectionViewLayoutAttributes* footAtt = [UICollectionViewLayoutAttributes layoutAttributesForSupplementaryViewOfKind:UICollectionElementKindSectionFooter withIndexPath:footPath];footAtt.frame = CGRectMake(footX, footY, footW, footH);[marr addObject:footAtt]; // 把数据保存到布局数组 self.layoutAttributeMarr = marr; } 二、计算内容区域 - (CGSize)collectionViewContentSize{ CGFloat CVCWidth = [UIScreen mainScreen].bounds.size.width; UICollectionViewLayoutAttributes* lastAtt = self.layoutAttributeMarr.lastObject; CGFloat CVCHeight = CGRectGetMaxY(lastAtt.frame)+_margin;//根据最大的Y值得到布局内容的高度 CGSize CVCSize = CGSizeMake(CVCWidth, CVCHeight); return CVCSize; } 三、返回布局对象数组 - (NSArray<UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect { return self.layoutAttributeMarr; }
数据存储方式:
1.writeToFile 写入数据: //1.1 你需要获取路径NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; // .XXX 尾椎 只是决定 以哪中方式查看数据, 对存入的数据本身没有影响 NSString *fiflePath = [path stringByAppendingPathComponent:@"data.XXX"]; //1.2 写数据NSArray *dataArray = @[@"亚洲国际舞王尼古拉斯赵四",@"小明",@"老王",@"霜霜"]; //1.3 存 //atomically 原子性的,数据安全的, 百分之九十九都是YES [dataArray writeToFile:fiflePath atomically:YES]; 读取数据: //1.读取路径 NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];NSString *fiflePath = [path stringByAppendingPathComponent:@"data.XXX"]; //2.取出来NSArray *dataArray = [NSArray arrayWithContentsOfFile:fiflePath]; 2.userDefault(偏好设置) 写入数据: //1. 获取系统的偏好设置对象 NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; //2. 存储数据[defaults setObject:@"小明" forKey:@"name"]; [defaults setInteger:100 forKey:@"age"]; [defaults setBool:NO forKey:@"isTrue"]; //3.立即同步: 强制写入 [defaults synchronize]; 读取数据: //1.获取到偏好设置的路径 NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; //2.读取数据NSString *name = [defaults objectForKey:@"name"];NSInteger age = [defaults integerForKey:@"age"];BOOL isTrue = [defaults boolForKey:@"isTrue"]; 3.归档 写入数据: //1.文件路径 NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"data.plist"]; //1. 有个对象CZPserson *p = [[CZPserson alloc]init];p.name = @"小明"; p.age = 100; p.sex = YES; //2.存储 归档 [NSKeyedArchiver archiveRootObject:p toFile:filePath]; 读取数据: 注意点: 如果使用归档 * 1. 该对象必须遵守NSCoding 协议 编码协议 2. 实现 encodeWithCoder方法 3. 实现:initWIthCoder方法NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"data.plist"]; //反归档 ,解档CZPserson *p = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath]; 实现<NSCoding>协议方法: - (void)encodeWithCoder:(NSCoder *)aCoder{ [aCoder encodeBool:self.sex forKey:@"sex"]; [aCoder encodeInteger:self.age forKey:@"age"];[aCoder encodeObject:self.name forKey:@"name"]; } //反归档只是个过程, 告诉系统你读取的时候,想让别人读取哪些属性 - (instancetype)initWithCoder:(NSCoder *)aDecoder{if (self = [super init]) {self.name = [aDecoder decodeObjectForKey:@"name"];self.age = [aDecoder decodeIntegerForKey:@"age"];self.sex = [aDecoder decodeBoolForKey:@"sex"];} return self; }
随机色:
- (UIColor *)randomColor{ return [UIColor colorWithRed:((float)arc4random_uniform(256) / 255.0) green:((float)arc4random_uniform(256) / 255.0) blue:((float)arc4random_uniform(256) / 255.0) alpha:1.0]; }
手势识别:
UITapGestureRecognizer(点按) UILongPressGestureRecognizer(长按) UISwipeGestureRecognizer(轻扫) UIRotationGestureRecognizer(旋转) UIPanGestureRecognizer(拖动) UIPinchGestureRecognizer(捏合,用于缩放) //1.创建一个手势 并且监听 UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)]; //最小触发 按压的时间 longPress.minimumPressDuration = 2.0; //允许多大范围内 触发 longPress.allowableMovement = 20; //2.添加到当前你想 操作的控件上 [self.myImageVIew addGestureRecognizer:longPress];
时间相关:
获取当前时间: 1.获取当天的日期NSDate *date = [NSDate date];//2.获取当前日历NSCalendar *lendar = [NSCalendar currentCalendar];//3.从日历中获取 秒数//(NSCalendarUnit) 单位NSInteger second = [lendar component:NSCalendarUnitSecond fromDate:date]; 2.抓取系统时间NSDate* nowDate = [NSDate date];NSDateFormatter* formatter = [[NSDateFormatter alloc]init];formatter.dateFormat = @"yyyy年MM月dd日HH时mm分ss秒";NSString *time = [formatter stringFromDate:nowDate]; 判断当前时间 -(BOOL)isToday{ NSCalendar *calendar=[NSCalendar currentCalendar]; NSCalendarUnit unit=NSCalendarUnitYear | NSCalendarUnitMonth |NSCalendarUnitDay; NSDateComponents *selfCmps=[calendar components:unit fromDate:self]; NSDateComponents *nowCmps=[calendar components:unit fromDate:[NSDate date]]; return selfCmps.year==nowCmps.year &&selfCmps.month==nowCmps.month &&selfCmps.day==nowCmps.day; } -(BOOL)isYesterday{ //生成只有年月日的日期对象 NSDateFormatter *fmt = [[NSDateFormatter alloc]init]; fmt.dateFormat=@"yyyy-MM-dd"; NSString *selfString =[fmt stringFromDate:self]; NSDate * selfDate=[fmt dateFromString:selfString]; NSString *nowString=[fmt stringFromDate:[NSDate date]]; NSDate *nowDate=[fmt dateFromString:nowString]; //比较差距 NSCalendar *calendar=[NSCalendar currentCalendar]; NSCalendarUnit unit=NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay; NSDateComponents *cmps=[calendar components:unit fromDate:selfDate toDate:nowDate options:0]; return cmps.year==0 && cmps.month==0 && cmps.day==1 ; } -(BOOL)isTomorrow{ //生成只有年月日的日期对象 NSDateFormatter *fmr=[[NSDateFormatter alloc]init]; fmr.dateFormat=@"yyyy-MM-dd"; NSString *selfString=[fmr stringFromDate:self]; NSDate * selfDate=[fmr dateFromString:selfString]; NSString *nowString=[fmr stringFromDate:[NSDate date]]; NSDate *nowDate=[fmr dateFromString:nowString]; NSCalendar *calendar =[NSCalendar currentCalendar]; NSCalendarUnit unit=NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay; NSDateComponents *cmps=[calendar components:unit fromDate:selfDate toDate:nowDate options:0]; return cmps.year==0 && cmps.month==0&& cmps.day==-1; } -(BOOL)isThisYeas{ NSCalendar *calendar=[NSCalendar currentCalendar]; NSInteger selfYear=[calendar component:NSCalendarUnitYear fromDate:self]; NSInteger nowYear=[calendar component:NSCalendarUnitYear fromDate:[NSDate date]]; return selfYear==nowYear; }
动画:
1.基础动画: //基础动画(缩放)CABasicAnimation* basic1 = [CABasicAnimation animationWithKeyPath:@"transform.scale"];basic1.toValue = @(0.1); //基础动画(旋转)CABasicAnimation* basic2 = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];basic2.toValue = @(M_PI*2); 2.关键帧动画://创建路径UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:self.view.center radius:150 startAngle:0 endAngle:M_PI*2 clockwise:YES];CAKeyframeAnimation* key = [CAKeyframeAnimation animationWithKeyPath:@"position"];key.path = path.CGPath; 3.转场动画: //3.添加转场动画CATransition *sition = [CATransition animation]; //设置属性//样式sition.type = kCATransitionMoveIn;//方向sition.subtype = kCATransitionFromBottom; //添加动画 [self.myImageView.layer addAnimation:sition forKey:nil]; 4.组动画: //创建路径UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:self.view.center radius:150 startAngle:0 endAngle:M_PI*2 clockwise:YES]; //创建组动画CAAnimationGroup* group = [CAAnimationGroup animation];//创建动画1,关键帧动画CAKeyframeAnimation* key = [CAKeyframeAnimation animationWithKeyPath:@"position"];key.path = path.CGPath;//创建动画2,基础动画(缩放)CABasicAnimation* basic1 = [CABasicAnimation animationWithKeyPath:@"transform.scale"];basic1.toValue = @(0.1);//创建动画3,基础动画(旋转)CABasicAnimation* basic2 = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];basic2.toValue = @(M_PI*2);//设置组动画group.animations = @[key,basic1,basic2];group.duration = 2.0;group.repeatCount = 10;[self.myLayer addAnimation:group forKey:nil];
NavigationController相关:
设置导航栏外观NSDictionary *dict = @{ NSFontAttributeName:[UIFont systemFontOfSize:16],NSForegroundColorAttributeName:[UIColor whiteColor] }; [self.navigationBar setTitleTextAttributes:dict]; // 修改导航栏上的item的外观 [self.navigationBar setTintColor:[UIColor whiteColor]]; 跳转隐藏tabBar - (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{ // 1.隐藏tabbar viewController.hidesBottomBarWhenPushed = YES; // 2.调用父类方法执行跳转 [super pushViewController:viewController animated:YES]; } 设置状态栏 - (UIStatusBarStyle)preferredStatusBarStyle{return UIStatusBarStyleLightContent; }
加载本地的html:
// 创建一个url
// NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
NSURL *url = [[NSBundle mainBundle] URLForResource:self.help.html withExtension:nil];
// 创建一个请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 使用webView加载请求对象
[webView loadRequest:request];
// 开始加载
- (void)webViewDidStartLoad:(UIWebView *)webView{ NSLog(@"开始加载");}
// 加载结束时执行Javascript代码
- (void)webViewDidFinishLoad:(UIWebView *)webView{
// 需要执行的JavaScript代码
NSString *jsCode = [NSString stringWithFormat:@"window.location.href = '#%@'",self.help.ID];
// webView执行js代码
[webView stringByEvaluatingJavaScriptFromString:jsCode]; }
字符串转对象:
// 获取accessoryType NSString *accessoryType = item[@"accessoryType"]; // 根据字符串创建类 Class class = NSClassFromString(accessoryType);// 根据类实例化对象 UIView *accessoryView = [[class alloc] init]; // 判断是否是UIImageView if ([accessoryView isKindOfClass:[UIImageView class]]) { // 强转成UIImageView UIImageView *imgView = (UIImageView *)accessoryView; // 设置ImgView的图片 imgView.image = [UIImage imageNamed:@"arrow_right"]; // 自适应大小[imgView sizeToFit];}
拨打电话:
//1.获取APP 对象UIApplication *app = [UIApplication sharedApplication]; //2.打电话 NSURL *url = [NSURL URLWithString:@"tel://1234567890"]; [app openURL:url]; //简写: [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://1234567890"]];
应用程序之间跳转:
NSURL *URL = [NSURL URLWithString:@"appB://ios.myapp.cn"]; [[UIApplication sharedApplication] openURL:URL];
裁剪图片
//1.裁剪区域 CGRect rect = CGRectMake(x, y, w, h); // 2.调用系统的裁剪方法裁剪图片/* 参数: 1.被裁剪的大图 CG类型 2.需要裁剪的区域 */ CGImageRef imageRef = CGImageCreateWithImageInRect(image.CGImage, rect); // 转换成UIImage UIImage *img = [UIImage imageWithCGImage:imageRef]; // 释放imageRef CGImageRelease(imageRef);
传递事件,判断当前点是否在一个区域内
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{// 1.描述一下按钮上部分的区域 CGRect rect = CGRectMake(0, 0, self.bounds.size.width, 100); // 2.判断当前点击的点在不在上部分(如果不在,就直接返回nil) if (!CGRectContainsPoint(rect, point)) { return nil; } // 3.继续传递事件 return [super hitTest:point withEvent:event]; }
从网络获取图片
NSURL* url = [NSURL URLWithString:@"http://d.hiphotos.baidu.com/image/h%3D200/sign=c36bc6f3d32a28345ca6310b6bb4c92e/91ef76c6a7efce1b3e241e24a851f3deb58f65d5.jpg"]; NSData* data = [NSData dataWithContentsOfURL:url]; UIImage* image = [UIImage imageWithData:data];
开启子线程
第一种方法 NSThread *thread1 = [[NSThread alloc]initWithTarget:self selector:@selector(buyTickets) object:nil]; //设置名称 thread1.name = @"1111"; //设置优先级 thread1.threadPriority = 0.3; [thread1s start]; 第二种方法[NSThread detachNewThreadSelector:@selector(buyTickets) toTarget:self withObject:nil]; 第三种方法[self performSelectorInBackground:@selector(buyTickets) withObject:nil];
url中文和特殊字符转码
- (NSString *)generateUrl:(NSString *)url{/** 第一个参数:NULL 第二个参数:C语言的字符串 第三个参数:NULL 第四个参数:要转义的字符串,不要乱转 第五个参数:编码 */ NSString *encodedString = (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes( NULL,(__bridge CFStringRef)url,NULL,CFSTR("+"),CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)); return encodedString; }
数据加密
base64加密 加密 - (NSString *)base64Encode:(NSString *)originalString{ //1.将originalString转成二进制 NSData *data = [originalString dataUsingEncoding:NSUTF8StringEncoding]; //2.需要将二进制转成Base64加密之后的字符串 return [data base64EncodedStringWithOptions:0]; } 解密 - (NSString *)base64Decode:(NSString *)base64String{ //1.Base64加密之后的字符串转成 NSData NSData *data = [[NSData alloc] initWithBase64EncodedString:base64String options:0]; //2.将二进制转在字符串 NSString *originalString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; return originalString; } 钥匙串 //设置钥匙串self.bundleId = [NSBundle mainBundle].bundleIdentifier;NSString* value = [SSKeychain passwordForService:self.bundleId account:@"password"]; //保存密码到钥匙串[SSKeychain setPassword:password forService:self.bundleId account:@"password"]; MD5/SHA //散列函数 - (NSString *)md5String {const char *str = self.UTF8String;uint8_t buffer[CC_MD5_DIGEST_LENGTH];CC_MD5(str, (CC_LONG)strlen(str), buffer);return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH]; } - (NSString *)sha1String {const char *str = self.UTF8String;uint8_t buffer[CC_SHA1_DIGEST_LENGTH];CC_SHA1(str, (CC_LONG)strlen(str), buffer);return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH]; } - (NSString *)sha256String {const char *str = self.UTF8String;uint8_t buffer[CC_SHA256_DIGEST_LENGTH];CC_SHA256(str, (CC_LONG)strlen(str), buffer);return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH]; } - (NSString *)sha512String {const char *str = self.UTF8String;uint8_t buffer[CC_SHA512_DIGEST_LENGTH];CC_SHA512(str, (CC_LONG)strlen(str), buffer);return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH]; } #pragma mark - HMAC 散列函数 - (NSString *)hmacMD5StringWithKey:(NSString *)key {const char *keyData = key.UTF8String;const char *strData = self.UTF8String;uint8_t buffer[CC_MD5_DIGEST_LENGTH];CCHmac(kCCHmacAlgMD5, keyData, strlen(keyData), strData, strlen(strData), buffer);return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH]; } - (NSString *)hmacSHA1StringWithKey:(NSString *)key {const char *keyData = key.UTF8String;const char *strData = self.UTF8String;uint8_t buffer[CC_SHA1_DIGEST_LENGTH];CCHmac(kCCHmacAlgSHA1, keyData, strlen(keyData), strData, strlen(strData), buffer);return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH]; } - (NSString *)hmacSHA256StringWithKey:(NSString *)key {const char *keyData = key.UTF8String;const char *strData = self.UTF8String;uint8_t buffer[CC_SHA256_DIGEST_LENGTH];CCHmac(kCCHmacAlgSHA256, keyData, strlen(keyData), strData, strlen(strData), buffer);return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH]; } - (NSString *)hmacSHA512StringWithKey:(NSString *)key {const char *keyData = key.UTF8String;const char *strData = self.UTF8String;uint8_t buffer[CC_SHA512_DIGEST_LENGTH];CCHmac(kCCHmacAlgSHA512, keyData, strlen(keyData), strData, strlen(strData), buffer);return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH]; } #pragma mark - 文件散列函数 #define FileHashDefaultChunkSizeForReadingData 4096 - (NSString *)fileMD5Hash {NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];if (fp == nil) {return nil;}CC_MD5_CTX hashCtx;CC_MD5_Init(&hashCtx);while (YES) {@autoreleasepool {NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];CC_MD5_Update(&hashCtx, data.bytes, (CC_LONG)data.length);if (data.length == 0) {break;}}}[fp closeFile];uint8_t buffer[CC_MD5_DIGEST_LENGTH];CC_MD5_Final(buffer, &hashCtx);return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH]; } - (NSString *)fileSHA1Hash {NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];if (fp == nil) {return nil;}CC_SHA1_CTX hashCtx;CC_SHA1_Init(&hashCtx);while (YES) {@autoreleasepool {NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];CC_SHA1_Update(&hashCtx, data.bytes, (CC_LONG)data.length);if (data.length == 0) {break;}}}[fp closeFile];uint8_t buffer[CC_SHA1_DIGEST_LENGTH];CC_SHA1_Final(buffer, &hashCtx);return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH]; } - (NSString *)fileSHA256Hash {NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];if (fp == nil) {return nil;}CC_SHA256_CTX hashCtx;CC_SHA256_Init(&hashCtx);while (YES) {@autoreleasepool {NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];CC_SHA256_Update(&hashCtx, data.bytes, (CC_LONG)data.length);if (data.length == 0) {break;}}}[fp closeFile];uint8_t buffer[CC_SHA256_DIGEST_LENGTH];CC_SHA256_Final(buffer, &hashCtx);return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH]; } - (NSString *)fileSHA512Hash {NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];if (fp == nil) {return nil;}CC_SHA512_CTX hashCtx;CC_SHA512_Init(&hashCtx);while (YES) {@autoreleasepool {NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];CC_SHA512_Update(&hashCtx, data.bytes, (CC_LONG)data.length);if (data.length == 0) {break;}}}[fp closeFile];uint8_t buffer[CC_SHA512_DIGEST_LENGTH];CC_SHA512_Final(buffer, &hashCtx);return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH]; } #pragma mark - 助手方法 /** * 返回二进制 Bytes 流的字符串表示形式 * * @param bytes 二进制 Bytes 数组 * @param length 数组长度 * * @return 字符串表示形式 */ - (NSString *)stringFromBytes:(uint8_t *)bytes length:(int)length {NSMutableString *strM = [NSMutableString string];for (int i = 0; i < length; i++) {[strM appendFormat:@"%02x", bytes[i]];}return [strM copy]; }
解压缩文件
//下载完毕解压到当前文件夹[SSZipArchive unzipFileAtPath:location.path toDestination:self.destinationPath uniqueId:nil];
数组排序
[marr sortUsingComparator:^NSComparisonResult(NewsModel* model1, NewsModel* model2) { return [model1.num compare: model2.num]; }];
数组倒序
NSArray* arr = [[ordersMarr reverseObjectEnumerator] allObjects];
NSArray 快速求总和、最大值、最小值、平均值
- (void)caculateArray:(NSArray *)array{ CGFloat sum = [[array valueForKeyPath:@"@sum.floatValue"] floatValue]; CGFloat avg = [[array valueForKeyPath:@"@avg.floatValue"] floatValue]; CGFloat max =[[array valueForKeyPath:@"@max.floatValue"] floatValue]; CGFloat min =[[array valueForKeyPath:@"@min.floatValue"] floatValue]; NSLog(@"%fn%fn%fn%f",sum,avg,max,min); return [NSString stringWithFormat:@"%f",sum];}
字符串排序分组
将字符串数组按照元素首字母顺序进行排序分组 + (NSDictionary *)dictionaryOrderByCharacterWithOriginalArray:(NSArray *)array{ if (array.count == 0){ return nil; } for (id obj in array) { if (![obj isKindOfClass:[NSString class]]){ return nil; } } UILocalizedIndexedCollation *indexedCollation = [UILocalizedInd exedCollation currentCollation]; NSMutableArray *objects = [NSMutableArray arrayWithCapacity:indexedCollation.sectionTitles.count]; //创建27个分组数组 for (int i = 0; i < indexedCollation.sectionTitles.count; i++) { NSMutableArray *obj = [NSMutableArray array]; [objects addObject:obj]; } NSMutableArray *keys = [NSMutableArray arrayWithCapacity:objects.count]; //按字母顺序进行分组 NSInteger lastIndex = -1; for (int i = 0; i < array.count; i++) { NSInteger index = [indexedCollation sectionForObject:array[i] collationStringSelector:@selector(uppercaseString)]; [[objects objectAtIndex:index] addObject:array[i]]; lastIndex = index; } //去掉空数组 for (int i = 0; i < objects.count; i++) { NSMutableArray *obj = objects[i]; if (obj.count == 0) { [objects removeObject:obj]; } } //获取索引字母 for (NSMutableArray *obj in objects) { NSString *str = obj[0]; NSString *key = [self firstCharacterWithString:str]; [keys addObject:key]; } NSMutableDictionary *dic = [NSMutableDictionary dictionary]; [dic setObject:objects forKey:keys]; return dic; }
计算磁盘大小
1.磁盘总空间大小 + (CGFloat)diskOfAllSizeMBytes{ CGFloat size = 0.0; NSError *error; NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error]; if (error) {#ifdef DEBUG NSLog(@"error: %@", error.localizedDescription);#endif }else{ NSNumber *number = [dic objectForKey:NSFileSystemSize]; size = [number floatValue]/1024/1024; } return size; } 2.磁盘可用空间大小 + (CGFloat)diskOfFreeSizeMBytes{ CGFloat size = 0.0; NSError *error; NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error]; if (error) {#ifdef DEBUG NSLog(@"error: %@", error.localizedDescription);#endif }else{ NSNumber *number = [dic objectForKey:NSFileSystemFreeSize]; size = [number floatValue]/1024/1024; } return size; }
相册选择多文件(ZLPhotos)
//进入相册 ZLPhotoPickerViewController* imgPickerController = [[ZLPhotoPickerViewController alloc]init]; imgPickerController.status = PickerViewShowStatusSavePhotos; imgPickerController.maxCount = 3; //设置最大可选择数 [self presentViewController:imgPickerController animated:YES completion:nil]; //block传值 __weak typeof(self) weakSelf = self; imgPickerController.callBack = ^(NSArray *assets){ for (ZLPhotoAssets *photoAsset in assets) { UIImage *image = photoAsset.originImage; NSData *imageData =UIImagePNGRepresentation(image); //随机生成的文件名称 NSString *fileName = [NSString stringWithFormat:@"%d.png",arc4random_uniform(100)]; //将每次获取到的图片,加入到字典中 [weakSelf.fileDict setObject:imageData forKey:fileName];} };
图片处理
对图片进行滤镜处理 // 怀旧 --> CIPhotoEffectInstant 单色 --> CIPhotoEffectMono // 黑白 --> CIPhotoEffectNoir 褪色 --> CIPhotoEffectFade // 色调 --> CIPhotoEffectTonal 冲印 --> CIPhotoEffectProcess // 岁月 --> CIPhotoEffectTransfer 铬黄 --> CIPhotoEffectChrome // CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField + (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{ CIContext *context = [CIContext contextWithOptions:nil]; CIImage *inputImage = [[CIImage alloc] initWithImage:image]; CIFilter *filter = [CIFilter filterWithName:name]; [filter setValue:inputImage forKey:kCIInputImageKey]; CIImage *result = [filter valueForKey:kCIOutputImageKey]; CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]]; UIImage *resultImage = [UIImage imageWithCGImage:cgImage]; CGImageRelease(cgImage); return resultImage; } 对图片进行模糊处理 // CIGaussianBlur ---> 高斯模糊 // CIBoxBlur ---> 均值模糊(Available in iOS 9.0 and later) // CIDiscBlur ---> 环形卷积模糊(Available in iOS 9.0 and later) // CIMedianFilter ---> 中值模糊, 用于消除图像噪点, 无需设置radius(Available in iOS 9.0 and later) // CIMotionBlur ---> 运动模糊, 用于模拟相机移动拍摄时的扫尾效果(Available in iOS 9.0 and later) + (UIImage *)blurWithOriginalImage:(UIImage *)image blurName:(NSString *)name radius:(NSInteger)radius{ CIContext *context = [CIContext contextWithOptions:nil]; CIImage *inputImage = [[CIImage alloc] initWithImage:image]; CIFilter *filter; if (name.length != 0) { filter = [CIFilter filterWithName:name]; [filter setValue:inputImage forKey:kCIInputImageKey]; if (![name isEqualToString:@"CIMedianFilter"]) { [filter setValue:@(radius) forKey:@"inputRadius"]; } CIImage *result = [filter valueForKey:kCIOutputImageKey]; CGImageRef cgImage = [context createCGImage:result fromRect: [result extent]]; UIImage *resultImage = [UIImage imageWithCGImage:cgImage]; CGImageRelease(cgImage); return resultImage; } else { return nil; } } 毛玻璃效果 //Avilable in iOS 8.0 and later + (UIVisualEffectView *)effectViewWithFrame:(CGRect)frame{ UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]; UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect]; effectView.frame = frame; return effectView; } 给image设置尺寸(缩放图片) - (UIImage *)imageByScalingToSize:(CGSize)targetSize{ UIImage *sourceImage = self; UIImage *newImage = nil; CGSize imageSize = sourceImage.size; CGFloat width = imageSize.width; CGFloat height = imageSize.height; CGFloat targetWidth = targetSize.width; CGFloat targetHeight = targetSize.height; CGFloat scaleFactor = 0.0; CGFloat scaledWidth = targetWidth; CGFloat scaledHeight = targetHeight; CGPoint thumbnailPoint = CGPointMake(0.0,0.0); if (CGSizeEqualToSize(imageSize, targetSize) ==NO) { CGFloat widthFactor = targetWidth / width; CGFloat heightFactor = targetHeight / height; if (widthFactor < heightFactor) scaleFactor = widthFactor; else scaleFactor = heightFactor; scaledWidth = width * scaleFactor; scaledHeight = height * scaleFactor; if (widthFactor < heightFactor) { thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5; } else if (widthFactor > heightFactor) { thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5; } } UIGraphicsBeginImageContext(targetSize); CGRect thumbnailRect = CGRectZero; thumbnailRect.origin = thumbnailPoint; thumbnailRect.size.width = scaledWidth; thumbnailRect.size.height = scaledHeight; [sourceImage drawInRect:thumbnailRect]; newImage =UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); if(newImage == nil) NSLog(@"could not scale image"); return newImage ; }
设置Label的行间距
+ (void)setLineSpaceWithString:(UILabel *)label{ NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:label.text]; NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init]; [paragraphStyle setLineSpacing:3]; //调整行间距 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [label.text length])]; label.attributedText = attributedString; } 设置Label里的字符有不同的颜色 //可根据自己的需求进行增删改 - (void)stringColorSet { NSString*string = @"如何使得Label里的字符有不同的颜色?"; NSRange range = [string rangeOfString: @"Label"]; NSMutableAttributedString*attribute = [[NSMutableAttributedString alloc] initWithString: string]; [attribute addAttributes: @{NSForegroundColorAttributeName: [UIColor redColor]}range: range]; [attribute addAttributes: @{NSForegroundColorAttributeName: [UIColor greenColor]}range: NSMakeRange(0, range.location)]; [attribute addAttributes: @{NSForegroundColorAttributeName: [UIColor cyanColor]}range: NSMakeRange(range.location+ range.length, 5)]; UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0.0f, 100.0f, 320.0f, 100.0f)]; [label setText: string]; [label setAttributedText: attribute];} 设置label显示多行文字 let lab = UILabel() let title = "马上登陆\n\n开启我的奇妙之旅~" //富文本单独设置后面的名称 let attr = NSMutableAttributedString(string: title) //获取名字范围 let range = (title as NSString).rangeOfString("开启我的奇妙之旅~") //单独设置制定范围的字符串 attr.addAttributes([NSForegroundColorAttributeName : UIColor.lightGrayColor(),NSFontAttributeName : UIFont.systemFontOfSize(12)], range: range) //赋值 lab.attributedText = attire //设置换行 lab.numberOfLines = 0 //设置文字大小 lab.font = UIFont.systemFontOfSize(14) //文字颜色 lab.textColor = UIColor.grayColor() //文字居中 lab.textAlignment = .Center
信息验证
判断手机号码格式是否正确,利用正则表达式验证 + (BOOL)isMobileNumber:(NSString *)mobileNum{if (mobileNum.length != 11) {return NO;} /** * 手机号码: * 13[0-9], 14[5,7], 15[0, 1, 2, 3, 5, 6, 7, 8, 9], 17[6, 7, 8], 18[0-9], 170[0-9] * 移动号段: 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705 * 联通号段: 130,131,132,155,156,185,186,145,176,1709 * 电信号段: 133,153,180,181,189,177,1700 * / NSString *MOBILE = @"^1(3[0-9]|4[57]|5[0-35-9]|8[0-9]|70)\d{8}$"; /** * 中国移动:China Mobile * 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705 */ NSString *CM = @"(^1(3[4-9]|4[7]|5[0-27-9]|7[8]|8[2-478])\d{8}$)|(^1705\d{7}$)"; /** * 中国联通:China Unicom * 130,131,132,155,156,185,186,145,176,1709 */ NSString *CU = @"(^1(3[0-2]|4[5]|5[56]|7[6]|8[56])\d{8}$)|(^1709\d{7}$)"; /** * 中国电信:China Telecom * 133,153,180,181,189,177,1700 */ NSString *CT = @"(^1(33|53|77|8[019])\d{8}$)|(^1700\d{7}$)"; NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE]; NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM]; NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU]; NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT]; if (([regextestmobile evaluateWithObject:mobileNum] == YES) || ([regextestcm evaluateWithObject:mobileNum] == YES) || ([regextestct evaluateWithObject:mobileNum] == YES) || ([regextestcu evaluateWithObject:mobileNum] == YES)){return YES;} else {return NO;} } 2. 判断邮箱格式是否正确,利用正则表达式验证 + (BOOL)isAvailableEmail:(NSString *)email{ NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}"; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:email]; } 3. 判断字符串中是否含有空格 + (BOOL)isHaveSpaceInString:(NSString *)string{ NSRange _range = [string rangeOfString:@" "]; if (_range.location != NSNotFound) {return YES;}else {return NO;} } 4. 判断字符串中是否含有中文 + (BOOL)isHaveChineseInString:(NSString *)string{for(NSInteger i = 0; i < [string length]; i++){int a = [string characterAtIndex:i];if (a > 0x4e00 && a < 0x9fff) {return YES;}}return NO; } 判断身份证格式 + (BOOL)checkIdentityCardNo:(NSString*)value {value = [value stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];NSInteger length =0;if (!value) {return NO;}else {length = value.length;if (length !=15 && length !=18) {return NO;}}// 省份代码NSArray *areasArray =@[@"11",@"12", @"13",@"14", @"15",@"21", @"22",@"23", @"31",@"32", @"33",@"34", @"35",@"36", @"37",@"41", @"42",@"43", @"44",@"45", @"46",@"50", @"51",@"52", @"53",@"54", @"61",@"62", @"63",@"64", @"65",@"71", @"81",@"82", @"91"];NSString *valueStart2 = [value substringToIndex:2];BOOL areaFlag =NO;for (NSString *areaCode in areasArray) {if ([areaCode isEqualToString:valueStart2]) {areaFlag =YES;break;}}if (!areaFlag) {return false;}NSRegularExpression *regularExpression;NSUInteger numberofMatch;NSInteger year =0;switch (length) {case 15:year = [[value substringWithRange:NSMakeRange(6,2)] integerValue] +1900;if (year %4 ==0 || (year 0 ==0 && year %4 ==0)) {regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$" options:NSRegularExpressionCaseInsensitive error:nil];//测试出生日期的合法性}else {regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$" options:NSRegularExpressionCaseInsensitive error:nil];//测试出生日期的合法性 }numberofMatch = [regularExpression numberOfMatchesInString:value options:NSMatchingReportProgress range:NSMakeRange(0, value.length)];if(numberofMatch >0) {return YES;}else {return NO;}case 18:year = [value substringWithRange:NSMakeRange(6,4)].intValue;if (year %4 ==0 || (year 0 ==0 && year %4 ==0)) {regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$" options:NSRegularExpressionCaseInsensitive error:nil];//测试出生日期的合法性}else {regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$" options:NSRegularExpressionCaseInsensitive error:nil];//测试出生日期的合法性 }numberofMatch = [regularExpression numberOfMatchesInString:value options:NSMatchingReportProgress range:NSMakeRange(0, value.length)];if(numberofMatch >0) {int S = ([value substringWithRange:NSMakeRange(0,1)].intValue + [value substringWithRange:NSMakeRange(10,1)].intValue) *7 + ([value substringWithRange:NSMakeRange(1,1)].intValue + [value substringWithRange:NSMakeRange(11,1)].intValue) *9 + ([value substringWithRange:NSMakeRange(2,1)].intValue + [value substringWithRange:NSMakeRange(12,1)].intValue) *10 + ([value substringWithRange:NSMakeRange(3,1)].intValue + [value substringWithRange:NSMakeRange(13,1)].intValue) *5 + ([value substringWithRange:NSMakeRange(4,1)].intValue + [value substringWithRange:NSMakeRange(14,1)].intValue) *8 + ([value substringWithRange:NSMakeRange(5,1)].intValue + [value substringWithRange:NSMakeRange(15,1)].intValue) *4 + ([value substringWithRange:NSMakeRange(6,1)].intValue + [value substringWithRange:NSMakeRange(16,1)].intValue) *2 + [value substringWithRange:NSMakeRange(7,1)].intValue *1 + [value substringWithRange:NSMakeRange(8,1)].intValue *6 + [value substringWithRange:NSMakeRange(9,1)].intValue *3;int Y = S ;NSString *M =@"F";NSString *JYM =@"10X98765432";M = [JYM substringWithRange:NSMakeRange(Y,1)];// 判断校验位if ([M isEqualToString:[value substringWithRange:NSMakeRange(17,1)]]) {return YES;// 检测ID的校验位}else {return NO;}}else {return NO;}default:return false;} }
常用函数:
rand() ----随机数 abs() / labs() ----整数绝对值 fabs() / fabsf() / fabsl() ----浮点数绝对值 floor() / floorf() / floorl() ----向下取整 ceil() / ceilf() / ceill() ----向上取整 round() / roundf() / roundl() ----四舍五入 sqrt() / sqrtf() / sqrtl() ----求平方根 fmax() / fmaxf() / fmaxl() ----求最大值 fmin() / fminf() / fminl() ----求最小值 hypot() / hypotf() / hypotl() ----求直角三角形斜边的长度 fmod() / fmodf() / fmodl() ----求两数整除后的余数 modf() / modff() / modfl() ----浮点数分解为整数和小数 frexp() / frexpf() / frexpl() ----浮点数分解尾数和二为底的指数 sin() / sinf() / sinl() ----求正弦值 sinh() / sinhf() / sinhl() ----求双曲正弦值 cos() / cosf() / cosl() ----求余弦值 cosh() / coshf() / coshl() ----求双曲余弦值 tan() / tanf() / tanl() ----求正切值 tanh() / tanhf() / tanhl() ----求双曲正切值 asin() / asinf() / asinl() ----求反正弦值 asinh() / asinhf() / asinhl() ----求反双曲正弦值 acos() / acosf() / acosl() ----求反余弦值 acosh() / acoshf() / acoshl() ----求反双曲余弦值 atan() / atanf() / atanl() ----求反正切值 atan2() / atan2f() / atan2l() ----求坐标值的反正切值 atanh() / atanhf() / atanhl() ----求反双曲正切值
判断手势方向:
CGPoint translation = [scrollView.panGestureRecognizer translationInView:scrollView.superview]; if (translation.y>0) { // NSLog(@"----------下-----------"); }else if(translation.y<0){ // NSLog(@"----------上-----------"); }
获取路径下文件大小
- (unsigned long long)fileSizes{ // 获得文件管理者 NSFileManager *mgr = [NSFileManager defaultManager]; // 是否为文件夹 BOOL isDirectory = NO; // 先判断路径的存在性 BOOL exists = [mgr fileExistsAtPath:self isDirectory:&isDirectory];// 路径不存在 if (!exists) return 0; // 如果是文件夹 if (isDirectory) { // 文件总大小 unsigned long long fileSize = 0; // 遍历所有文件 NSDirectoryEnumerator *enumerator = [mgr enumeratorAtPath:self]; for (NSString *subpath in enumerator) { // 完整的子路径 NSString *fullSubpath = [self stringByAppendingPathComponent:subpath]; fileSize += [mgr attributesOfItemAtPath:fullSubpath error:nil].fileSize; } return fileSize; } // 如果是文件 return [mgr attributesOfItemAtPath:self error:nil].fileSize; }
获取设备型号
+ (NSString *)platform{ size_t size; sysctlbyname("hw.machine", NULL, &size, NULL, 0); char *machine = malloc(size); sysctlbyname("hw.machine", machine, &size, NULL, 0); NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding]; free(machine); if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 1G"; if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G"; if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS"; if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4 (GSM)"; if ([platform isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (CDMA)"; if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S"; if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5 (GSM)"; if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (GSM+CDMA)"; if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (GSM)"; if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (GSM+CDMA)"; if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (GSM)"; if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5s (GSM+CDMA)"; if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6Plus GSM"; if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6 GSM+CDMA"; if ([platform isEqualToString:@"iPhone8,1"]) return @"iPhone 6s GSM"; if ([platform isEqualToString:@"iPhone8,2"]) return @"iPhone 6s Plus Global"; if ([platform isEqualToString:@"iPhone8,4"]) return @"iPhone SE"; if ([platform isEqualToString:@"iPod1,1"]) return @"iPod Touch 1G"; if ([platform isEqualToString:@"iPod2,1"]) return @"iPod Touch 2G"; if ([platform isEqualToString:@"iPod3,1"]) return @"iPod Touch 3G"; if ([platform isEqualToString:@"iPad2,1"]) return @"iPad 2 (WiFi)"; if ([platform isEqualToString:@"iPad2,2"]) return @"iPad 2 (GSM)"; if ([platform isEqualToString:@"iPad2,3"]) return @"iPad 2 (CDMA)"; if ([platform isEqualToString:@"iPad2,4"]) return @"iPad 2 (WiFi)"; if ([platform isEqualToString:@"iPad2,5"]) return @"iPad Mini (WiFi)"; if ([platform isEqualToString:@"iPad2,6"]) return @"iPad Mini (GSM)"; if ([platform isEqualToString:@"iPad2,7"]) return @"iPad Mini (GSM+CDMA)"; if ([platform isEqualToString:@"iPad3,1"]) return @"iPad 3 (WiFi)"; if ([platform isEqualToString:@"iPad3,2"]) return @"iPad 3 (GSM+CDMA)"; if ([platform isEqualToString:@"iPad3,3"]) return @"iPad 3 (GSM)"; if ([platform isEqualToString:@"iPad3,4"]) return @"iPad 4 (WiFi)"; if ([platform isEqualToString:@"iPad3,5"]) return @"iPad 4 (GSM)"; if ([platform isEqualToString:@"iPad3,6"]) return @"iPad 4 (GSM+CDMA)"; if ([platform isEqualToString:@"iPad4,1"]) return @"iPad Air (WiFi)"; if ([platform isEqualToString:@"iPad4,2"]) return @"iPad Air (GSM)"; if ([platform isEqualToString:@"iPad4,4"]) return @"iPad Mini Retina (WiFi)"; if ([platform isEqualToString:@"iPad4,5"]) return @"iPad Mini Retina (GSM)"; if ([platform isEqualToString:@"i386"]) return @"Simulator"; if ([platform isEqualToString:@"x86_64"]) return @"Simulator"; return platform; }
缓存处理
缓存路径 #define CacheFilePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] 清空缓存 +(BOOL)CleanCacheFilePath{ //拿到path路径的下一级目录的子文件夹 NSArray *subPathArr = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:CacheFilePath error:nil]; NSString *filePath = nil; NSError *error = nil; for (NSString *subPath in subPathArr) { filePath = [CacheFilePath stringByAppendingPathComponent:subPath]; //删除子文件夹 [[NSFileManager defaultManager] removeItemAtPath:filePath error:&error]; if (error) { NSLog(@"%@",error); continue; } } return YES; } 缓存计算 //转换B/KB/MB/GB +(NSString *)SetCacheSize:(unsigned long long)fileSize{ // 单位 double unit = 1000.0; // 标签文字 NSString *fileSizeText = nil; if (fileSize >= pow(unit, 3)) { // fileSize >= 1GB fileSizeText = [NSString stringWithFormat:@"%.2fGB", fileSize / pow(unit, 3)]; } else if (fileSize >= pow(unit, 2)) { // fileSize >= 1MB fileSizeText = [NSString stringWithFormat:@"%.2fMB", fileSize / pow(unit, 2)]; } else if (fileSize >= unit) { // fileSize >= 1KB fileSizeText = [NSString stringWithFormat:@"%.2fKB", fileSize / unit]; } else { // fileSize < 1KB fileSizeText = [NSString stringWithFormat:@"%zdB", fileSize]; } return fileSizeText; }
给TabBarController添加滑动切换
//添加滑动手势 UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedRightButton:)];[swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft];[self.view addGestureRecognizer:swipeLeft];UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedLeftButton:)];[swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];[self.view addGestureRecognizer:swipeRight]; - (void) tappedRightButton:(id)sender{ NSUInteger selectedIndex = [self.tabBarController selectedIndex]; NSArray *aryViewController = self.tabBarController.viewControllers; if (selectedIndex < aryViewController.count - 1) {[self.tabBarController setSelectedIndex:selectedIndex + 1];} } - (void) tappedLeftButton:(id)sender{NSUInteger selectedIndex = [self.tabBarController selectedIndex];if (selectedIndex > 0) {[self.tabBarController setSelectedIndex:selectedIndex - 1];} }
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