NSArray (API详解)

NSArray *addingAry = [NSArray array];NSArray *myAry = @[@"a",@"ちゃん",@"李",@"田",@"孔"];//- (NSArray<ObjectType> *)arrayByAddingObject:(ObjectType)anObject;//不可变数组添加单个元素addingAry = [myAry arrayByAddingObject:@"孙"];//- (NSArray<ObjectType> *)arrayByAddingObjectsFromArray:(NSArray<ObjectType> *)otherArray;//把另一数组元素拼接过来addingAry = [myAry arrayByAddingObjectsFromArray:@[@"赵",@"关",@"钱"]];NSLog(@"%@",addingAry);//- (NSString *)componentsJoinedByString:(NSString *)separator;//把元素根据指定字符分隔成 StringNSString *componentStr = [myAry componentsJoinedByString:@"-"];//- (BOOL)containsObject:(ObjectType)anObject;//是否包含某个元素BOOL isContains = [addingAry containsObject:@"陈"];//@property (readonly, copy) NSString *description;//元素当前编码格式的字符串NSString *descriptionStr = addingAry.description;//- (NSString *)descriptionWithLocale:(nullable id)locale;//TODO:本地化字符串//目前参考相关资料，NSArray 和 NSDictionary 分类重写时候用，这样在打印的时候本地化显示元素内容//重写方法在 分类 “NSArray+ArrayLocal.h”NSLocale *locale = [NSLocale currentLocale];
//    NSString *localeDescriptionStr = [addingAry descriptionWithLocale:locale];/*未重写前a,"\U5f20","\U674e","\U7530","\U5b54","\U8d75","\U5173","\U94b1"*//*重写后 打印数组a,ちゃん,李,田,孔,赵, 关, 钱,*///- (NSString *)descriptionWithLocale:(nullable id)locale indent:(NSUInteger)level;//本地化后，缩进值 （无语，只是本地化同时允许打印缩进）, 分类没重写带缩进方法，只是测试缩进效果NSString *localeAndLevDescriptionStr = [addingAry descriptionWithLocale:locale indent:3];/* indent 0(a,"\U3061\U3083\U3093","\U674e","\U7530","\U5b54","\U8d75","\U5173","\U94b1")*//* indent 3(a,"\U3061\U3083\U3093","\U674e","\U7530","\U5b54","\U8d75","\U5173","\U94b1")*///- (nullable ObjectType)firstObjectCommonWithArray:(NSArray<ObjectType> *)otherArray;//addingAry 首元素 与 另一数组的元素交集，如果有相同于首元素返回该元素值，如果不相同返回nilid commonObject = [addingAry firstObjectCommonWithArray:@[@"absdf",@"a"]];//- (void)getObjects:(ObjectType __unsafe_unretained [])objects range:(NSRange)range;//从range 范围获取元素赋值给 objects

检索Block方法、高效枚举方法

//- (NSUInteger)indexOfObjectIdenticalTo:(ObjectType)anObject;//- (NSUInteger)indexOfObject:(ObjectType)anObject;//返回相同值的最低索引NSUInteger i = [addingAry indexOfObjectIdenticalTo:@"田"];//3NSUInteger ii = [addingAry indexOfObject:@"田"];//3//- (NSEnumerator<ObjectType> *)objectEnumerator;//获取正序排列集合，通过 nextObject函数删除0下标元素NSArray *myAry1 = @[@"a",@"b",@"d",@"ff",@"c"];NSEnumerator *enumerator = [myAry1 objectEnumerator];id obj;while( obj=[enumerator nextObject]){//遍历完后，数组已经清空NSLog(@"%@",obj);/*a,b,d,ff,c*/}//执行一次删除下标0元素id enumObject = [enumerator nextObject];[enumerator nextObject];//返回数组NSArray *allAry = enumerator.allObjects;//- (NSEnumerator<ObjectType> *)reverseObjectEnumerator;//获取反序排列集合enumerator = [myAry1 reverseObjectEnumerator];allAry = enumerator.allObjects;/*c,ff,d,b,a*///自定义排序,混合使用比较复杂//@property (readonly, copy) NSData *sortedArrayHint;//- (NSArray<ObjectType> *)sortedArrayUsingFunction:(NSInteger (*)(ObjectType, ObjectType, void * __nullable))comparator context:(nullable void *)context;//- (NSArray<ObjectType> *)sortedArrayUsingFunction:(NSInteger (*)(ObjectType, ObjectType, void * __nullable))comparator context:(nullable void *)context hint:(nullable NSData *)hint;NSData *data = [allAry sortedArrayHint];NSArray *a = [allAry sortedArrayUsingFunction:sortType context:nil hint:data];//- (NSArray<ObjectType> *)subarrayWithRange:(NSRange)range;//截取range范围元素，返回一个新数组NSRange subRange = {1,3};NSArray *subAry = [allAry subarrayWithRange:subRange];//- (void)makeObjectsPerformSelector:(SEL)aSelector//- (void)makeObjectsPerformSelector:(SEL)aSelector withObject:(nullable id)argument//数组每一个元素执行一次 SEL ，元素只能是实例对象//*********************************//示例1 更改所有button selected 属性UIButton *btn1 = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];btn1.selected = NO;UIButton *btn2 = [[UIButton alloc]initWithFrame:CGRectMake(0, 200, 100, 100)];btn1.selected = NO;NSMutableArray *btnAry = [NSMutableArray arrayWithObjects:btn1,btn2,nil];[btnAry makeObjectsPerformSelector:@selector(setSelected:) withObject:@YES];//示例2 代替 for in 清空View[[self.view subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];//示例3 调用method__weak TRViewController *VC = self;SEL print = @selector(printfSomeTH);NSArray *objectAry = @[VC];[objectAry makeObjectsPerformSelector:print];//********************************//- (void)enumerateObjectsUsingBlock:(void (^)(ObjectType obj, NSUInteger idx, BOOL *stop))block//遍历数组，block返回每个数组元素、下标[allAry enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {;NSLog(@"block===obj:%@ idx:%ld stop:%s",obj,(unsigned long)idx,stop);if ([obj isEqualToString:@"b"]){*stop = YES; //停止循环}}];//- (void)enumerateObjectsWithOptions:(NSEnumerationOptions)opts usingBlock:(void (^)(ObjectType obj, NSUInteger idx, BOOL *stop))block//NSEnumerationConcurrent(正向遍历，同时回调两次打印)    NSEnumerationReverse(反向遍历，一次一次打印)__block NSUInteger num = 0;[allAry enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {num++;NSLog(@"Options===obj:%@ idx:%ld stop:%ud",obj,(unsigned long)idx,num);}];//- (void)enumerateObjectsAtIndexes:(NSIndexSet *)s options:(NSEnumerationOptions)opts usingBlock:(void (^)(ObjectType obj, NSUInteger idx, BOOL *stop))block//指定范围的数组元素遍历NSRange indexRange = {1,3};NSIndexSet *set = [NSIndexSet indexSetWithIndexesInRange:indexRange];[allAry enumerateObjectsAtIndexes:set options:NSEnumerationReverse usingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {NSLog(@"AtIndexes===obj:%@ idx:%ld stop:%s",obj,(unsigned long)idx,stop);}];//- (NSUInteger)indexOfObjectPassingTest:(BOOL (^)(ObjectType obj, NSUInteger idx, BOOL *stop))predicate//循环判断是否满足指定条件，满足返回 元素下标 结束遍历，不满足一直遍历完数组返回垃圾值NSUInteger passingTestNum = [allAry indexOfObjectPassingTest:^BOOL(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {if ([obj isEqualToString:@"ff"]){return YES;}return NO;}];if (passingTestNum==1){;}//- (NSUInteger)indexOfObjectWithOptions:(NSEnumerationOptions)opts passingTest:(BOOL (^)(ObjectType obj, NSUInteger idx, BOOL *stop))predicate//正反向遍历//- (NSUInteger)indexOfObjectAtIndexes:(NSIndexSet *)s options:(NSEnumerationOptions)opts passingTest:(BOOL (^)(ObjectType obj, NSUInteger idx, BOOL *stop))predicate//指定范围+正反向遍历//- (NSIndexSet *)indexesOfObjectsPassingTest:(BOOL (^)(ObjectType obj, NSUInteger idx, BOOL *stop))predicate//指定范围遍历数组元素,如果满足条件返回当前元素下标,NSIndexSet *indexSet = [allAry indexesOfObjectsAtIndexes:set options:NSEnumerationConcurrent passingTest:^BOOL(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {if ([obj isEqualToString:@"d"]){return YES;}return NO;}];NSUInteger fir = indexSet.firstIndex;

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