【代碼筆記】iOS-removeFromSuper

代碼：

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];
    
}
//當點擊任意處時，把UILabel去掉
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self removeFromView];
}
-(void)removeFromView
{
    //點擊後刪除之前的PickerView
    for (UIView *view in self.view.subviews) {
        if ([view isKindOfClass:[UILabel class]]) {
            [view removeFromSuperview];
        }
        
    }

}