【代码笔记】iOS-removeFromSuper

代码：

RootViewController.m

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        self.title=@"removeFromSuperView";            UILabel *tryLabel=[[UILabel alloc]initWithFrame:CGRectMake(50, 150, 200, 50)];    tryLabel.backgroundColor=[UIColor redColor];    [self.view addSubview:tryLabel];    }//当点击任意处时，把UILabel去掉-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    [self removeFromView];}-(void)removeFromView{    //点击后删除之前的PickerView    for (UIView *view in self.view.subviews) {        if ([view isKindOfClass:[UILabel class]]) {            [view removeFromSuperview];        }            }}