1 #import <Foundation/Foundation.h>
 2
 3
 4
 5 typedef enum {
 6     ZLMessageTypeMe = 0, //0表示自己，并且系统默认的 也是0 ，然后递增加1
 7     ZLMessageTypeOther
 8 }ZLMessageType;
 9
10 @interface ZLMessage : NSObject
11
12 //时间
13 @property (nonatomic, strong) NSString *time;
14
15 //内容
16 @property (nonatomic, strong)NSString *text;
17
18 //类型
19 @property (nonatomic, assign)ZLMessageType type;
20
21 //是否显示时间
22 @property (nonatomic, assign)BOOL hideTime;
23
24 +(instancetype)messageWithDict:(NSDictionary *)dict;
25 -(instancetype)initWithDict:(NSDictionary *)dict;
26 @end

#import "ZLMessage.h"@implementation ZLMessage+(instancetype)messageWithDict:(NSDictionary *)dict{return [[self alloc] initWithDict:dict];
}
-(instancetype)initWithDict:(NSDictionary *)dict{if (self = [super init]) {[self setValuesForKeysWithDictionary:dict];}return self;}
@end

#import <Foundation/Foundation.h>
#import "UIKit/UIkit.h"
@class ZLMessage;@interface ZLMessageFrame : NSObject
// 头像的frame
@property (nonatomic, assign, readonly) CGRect iconF;//时间的frame
@property (nonatomic, assign, readonly) CGRect timeF;//正文的frame
@property (nonatomic, assign, readonly) CGRect textF;//cell的高度
@property (nonatomic, assign, readonly) CGFloat cellHeight;//数据模型
@property (nonatomic, strong) ZLMessage* message;@end

#define ZLTextFont [UIFont systemFontOfSize:15]

#import "ZLMessageFrame.h"

#import "ZLMessage.h"

@implementation ZLMessageFrame

/**

*  计算文字尺寸

*

*  @param text    需要计算尺寸的文字

*  @param font    文字的字体

*  @param maxSize 文字的最大尺寸

*/

- (CGSize)sizeWithText:(NSString *)text font:(UIFont *)font maxSize:(CGSize)maxSize

{

NSDictionary *attrs = @{NSFontAttributeName : font};

return [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrs context:nil].size;

}

-(void)setMessage:(ZLMessage *)message

{    _message = message;

//计算头像，正文，时间的Frame

CGFloat sreenW = [UIScreen mainScreen].bounds.size.width;

CGFloat padding = 10;

    //1.时间

  CGFloat timeX = 0;

CGFloat timeY = 0;

CGFloat timeW = sreenW;

CGFloat timeH = 40;

_timeF = CGRectMake(timeX, timeY, timeW, timeH);

//2.头像

CGFloat iconY = CGRectGetMaxY(_timeF);

CGFloat iconW = 40;

CGFloat iconH = 40;

CGFloat iconX;

if (message.type == ZLMessageTypeOther) {

iconX = padding;

} else {

iconX = sreenW - iconW - padding;

}

_iconF = CGRectMake(iconX, iconY, iconW, iconH);

//3.正文

CGFloat textY = iconY;

CGFloat textX;

//文字的尺寸

CGSize textMaxSize = CGSizeMake(150, MAXFLOAT);

CGSize textSize = [self sizeWithText:message.text font:ZLTextFont maxSize:textMaxSize];

if (message.type == ZLMessageTypeOther) {

textX = CGRectGetMaxX(_iconF) + padding;

} else {

textX = iconX - padding - textSize.width;

}

_textF = (CGRect){{textX,textY},textSize};

//cell 的高度

CGFloat textMaxY = CGRectGetMaxY(_textF);

CGFloat iconMaxY = CGRectGetMaxY(_iconF);

   _cellHeight = MAX(textMaxY, iconMaxY) + padding;

}

@end

- (NSMutableArray *)messagesFrames
{if (_messagesFrames == nil){//取出路径NSString *path = [[NSBundle mainBundle] pathForResource:@"messages.plist" ofType:nil];//取出该路劲下的数组NSArray *dictArray = [NSArray arrayWithContentsOfFile:path];NSMutableArray *mfArray = [NSMutableArray array];//遍历数组形成字典for (NSDictionary* dict  in dictArray) {//消息模型ZLMessage *msg = [ZLMessage messageWithDict:dict];//frame模型ZLMessageFrame *mgf =[[ZLMessageFrame alloc] init];mgf.message = msg;[mfArray addObject:mgf];}_messagesFrames = mfArray;}return _messagesFrames;
}

#import <UIKit/UIKit.h>@class ZLMessageFrame;@interface ZLMessageCell : UITableViewCell+(instancetype) cellWithTableView:(UITableView *)tableView;@property (nonatomic, strong) ZLMessageFrame* messageFrame;@end

#define ZLTextFont [UIFont systemFontOfSize:15]
#import "ZLMessageCell.h"
#import "ZLMessageFrame.h"
#import "ZLMessage.h"@interface ZLMessageCell()
//时间
@property (nonatomic, weak) UILabel *timeView;//头像
@property (nonatomic, weak) UIImageView *iconView;//正文
@property (nonatomic, weak) UIButton *textView;;@end@implementation ZLMessageCell+(instancetype) cellWithTableView:(UITableView *)tableView
{static NSString *ID = @"message";//先从缓存池中取cellZLMessageCell *cell = [tableView dequeueReusableCellWithIdentifier:ID ];//如果缓存池中没有就自己创建cell，并且要带有标记if (cell == nil) {cell = [[ZLMessageCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];}return cell;
}//做一次性的初始化
-(id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];if (self){//子控件的创建和初始化//1.时间UILabel *timeView = [[UILabel alloc] init];timeView.textColor = [UIColor grayColor];timeView.textAlignment = NSTextAlignmentCenter;timeView.font = [UIFont systemFontOfSize:13];[self.contentView addSubview:timeView];self.timeView = timeView;//2.头像UIImageView *iconView = [[UIImageView alloc] init];//iconView.backgroundColor = [UIColor redColor];
        [self.contentView addSubview:iconView];self.iconView = iconView;//3.正文UIButton *textView = [[UIButton alloc] init];textView.titleLabel.numberOfLines = 0;//自动换行textView.backgroundColor = [UIColor purpleColor];textView.titleLabel.font = ZLTextFont;[self.contentView addSubview:textView];self.textView = textView;}return self;}-(void)setMessageFrame:(ZLMessageFrame *)messageFrame
{_messageFrame = messageFrame;ZLMessage *message = messageFrame.message;//时间self.timeView.text = message.time;self.timeView.frame = messageFrame.timeF;//头像NSString *icon = (message.type == ZLMessageTypeMe) ? @"me" : @"other";self.iconView.image = [UIImage imageNamed:icon];self.iconView.frame = messageFrame.iconF;//正文
    [self.textView setTitle:message.text forState:UIControlStateNormal];self.textView.frame = messageFrame.textF;}
@end

在ZLMessage.h文件中添加属性//是否显示时间
@property (nonatomic, assign)BOOL hideTime;

在控制器.m文件中添加代码，即取出上一个模型和刚刚添加的模型的时间作比较，如果时间一样，就只显示上一个模型的time数据
//遍历数组形成字典for (NSDictionary* dict  in dictArray) {//消息模型ZLMessage *msg = [ZLMessage messageWithDict:dict];//取出上一个模型ZLMessageFrame *lastMf = [mfArray lastObject];ZLMessage *lastMg = lastMf.message;msg.hideTime = [msg.time isEqualToString:lastMg.

//设置图片if (message.type == MJMessageTypeMe) { // 自己发的,蓝色[self.textView setBackgroundImage:[UIImage resizableImage:@"chat_send_nor"] forState:UIControlStateNormal];} else { // 别人发的,白色[self.textView setBackgroundImage:[UIImage resizableImage:@"chat_recive_nor"] forState:UIControlStateNormal];}

//为了显示对话框背景图，需要设置正文按钮的内边距

textView.contentEdgeInsets = UIEdgeInsetsMake(ZLTextPadding, ZLTextPadding, ZLTextPadding, ZLTextPadding);

//文字计算的最大尺寸CGSize textMaxSize = CGSizeMake(150, MAXFLOAT);
//文字计算出来的真实尺寸(显示文字的尺寸)CGSize textSize = [self sizeWithText:message.text font:ZLTextFont maxSize:textMaxSize];//按钮最终的尺寸   CGSize textBtnSize = CGSizeMake(textSize.width +ZLTextPadding *2, textSize.height +ZLTextPadding *2);if (message.type == ZLMessageTypeOther) {textX = CGRectGetMaxX(_iconF) + padding;} else {textX = iconX - padding - textBtnSize.width;}
//    _textF = CGRectMake(textX, textY, textSize.width +40, textSize.height +40);_textF = (CGRect){{textX,textY},textBtnSize};

// 监听键盘的通知[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];//取消监听
- (void)dealloc
{[[NSNotificationCenter defaultCenter] removeObserver:self];
}/***  当键盘改变了frame(位置和尺寸)的时候调用*/
- (void)keyboardWillChangeFrame:(NSNotification *)note
{// 设置窗口的颜色self.view.window.backgroundColor = self.tableView.backgroundColor;// 0.取出键盘动画的时间CGFloat duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];// 1.取得键盘最后的frameCGRect keyboardFrame = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];// 2.计算控制器的view需要平移的距离CGFloat transformY = keyboardFrame.origin.y - self.view.frame.size.height;// 3.执行动画[UIView animateWithDuration:duration animations:^{self.view.transform = CGAffineTransformMakeTranslation(0, transformY);}];
}

//监听文本框#import "MJViewController.h"
#import "MJMessage.h"
#import "MJMessageFrame.h"
#import "MJMessageCell.h"@interface MJViewController () <UITableViewDataSource, UITableViewDelegate, UITableViewDelegate, UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *messageFrames;@property (weak, nonatomic) IBOutlet UITextField *inputView;@property (nonatomic, strong) NSDictionary *autoreply;
@end@implementation MJViewController- (void)viewDidLoad
{[super viewDidLoad];// 1.表格的设置// 去除分割线self.tableView.backgroundColor = [UIColor colorWithRed:235/255.0 green:235/255.0 blue:235/255.0 alpha:1.0];self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;self.tableView.allowsSelection = NO; // 不允许选中self.tableView.delegate = self;// 2.监听键盘的通知[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];// 3.设置文本框左边显示的viewself.inputView.leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 8, 0)];// 永远显示self.inputView.leftViewMode = UITextFieldViewModeAlways;self.inputView.delegate = self;
}
/***  发送一条消息*/
- (void)addMessage:(NSString *)text type:(MJMessageType)type
{// 1.数据模型MJMessage *msg = [[MJMessage alloc] init];msg.type = type;msg.text = text;// 设置数据模型的时间NSDate *now = [NSDate date];NSDateFormatter *fmt = [[NSDateFormatter alloc] init];fmt.dateFormat = @"HH:mm";// NSDate  --->  NSString// NSString ---> NSDate//    fmt.dateFormat = @"yyyy-MM-dd HH:mm:ss";//  2014-08-09 15:45:56// 09/08/2014  15:45:56msg.time = [fmt stringFromDate:now];// 看是否需要隐藏时间MJMessageFrame *lastMf = [self.messageFrames lastObject];MJMessage *lastMsg = lastMf.message;msg.hideTime = [msg.time isEqualToString:lastMsg.time];// 2.frame模型MJMessageFrame *mf = [[MJMessageFrame alloc] init];mf.message = msg;[self.messageFrames addObject:mf];// 3.刷新表格
    [self.tableView reloadData];// 4.自动滚动表格到最后一行NSIndexPath *lastPath = [NSIndexPath indexPathForRow:self.messageFrames.count - 1 inSection:0];[self.tableView scrollToRowAtIndexPath:lastPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}/***  根据自己发的内容取得自动回复的内容**  @param text 自己发的内容*/
- (NSString *)replayWithText:(NSString *)text
{for (int i = 0; i<text.length; i++) {NSString *word = [text substringWithRange:NSMakeRange(i, 1)];if (self.autoreply[word]) return self.autoreply[word];}return @"滚蛋";
}#pragma mark - 文本框代理
/***  点击了return按钮(键盘最右下角的按钮)就会调用*/
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{// 1.自己发一条消息
    [self addMessage:textField.text type:MJMessageTypeMe];// 2.自动回复一条消息NSString *reply = [self replayWithText:textField.text];[self addMessage:reply type:MJMessageTypeOther];// 3.清空文字self.inputView.text = nil;// 返回YES即可return YES;
}/***  当开始拖拽表格的时候就会调用*/
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{// 退出键盘
    [self.view endEditing:YES];
}