-(void)iteratorWithBlock
{
//////////處理數(shù)組//////////
NSArray *arrayM = @[@"1",@"2",@"3",@"4"];
[arrayM enumerateObjectsUsingBlock:^(id? _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"%zd--%@",idx,obj);
}];
//////////處理字典//////////
NSDictionary *dictM = @{@"1":@"one",@"2":@"two",@"3":@"three"};
[dictM enumerateKeysAndObjectsUsingBlock:^(id? _Nonnull key, id? _Nonnull obj, BOOL * _Nonnull stop) {
NSLog(@"%@:%@",key,obj);
}];
//////////處理集合//////////
NSSet * setM = [[NSSet alloc] initWithObjects:@"one",@"two",@"three",@"four", nil];
[setM enumerateObjectsUsingBlock:^(id? _Nonnull obj, BOOL * _Nonnull stop) {
NSLog(@"%@",obj);
}];
//////////反向遍歷----降序遍歷----以數(shù)組為例
NSArray *arrayM2 = @[@"1",@"2",@"3",@"4"];
[arrayM2 enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(id? _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"%zd--%@",idx,obj);
}];
}
