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 { //點擊后刪除之前的PickerView for (UIView *view in self.view.subviews) { if ([view isKindOfClass:[UILabel class]]) { [view removeFromSuperview]; } } }

轉載于:https://www.cnblogs.com/yang-guang-girl/p/6991253.html

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