Ios uibutton仅显示在新添加的uiview中

我无法显示uibutton*removeSticker，请帮忙

- (void)viewWillAppear:(BOOL)animated {

UIView *holderView = [[UIView alloc] initWithFrame:CGRectMake(0, 50, _imagePicker.selectedImage.size.width, _imagePicker.selectedImage.size.height)];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:[holderView frame]];
[imageView setImage:_imagePicker.selectedImage];
[holderView addSubview:imageView];

removeSticker = [UIButton buttonWithType:UIButtonTypeCustom];
removeSticker.frame = CGRectMake(0, 0, 32, 32);
[removeSticker setImage:[UIImage imageNamed:@"cancel-disabled.png"] forState:UIControlStateNormal];
[removeSticker addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchDown];
[holderView addSubview: removeSticker];
[removeSticker setHidden: YES];

UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scale:)];
[pinchRecognizer setDelegate:self];
[holderView addGestureRecognizer:pinchRecognizer];

UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];
[rotationRecognizer setDelegate:self];
[holderView addGestureRecognizer:rotationRecognizer];

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[holderView addGestureRecognizer:panRecognizer];

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped:)];
[tapRecognizer setNumberOfTapsRequired:1];
[tapRecognizer setDelegate:self];
[holderView addGestureRecognizer:tapRecognizer];

UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
[longPressRecognizer setDelegate:self];
[holderView addGestureRecognizer:longPressRecognizer];

[stickerView addSubview:holderView];

}

- (void)buttonClicked:(id)sender{
UIView *holderView = [(UIButton *)sender superview]; [holderView removeFromSuperview];
}

uibutton*removeSticker仅出现在最新添加的uiview*holderView上，如果我想编辑以前添加的uibutton*removeSticker一次，则不会发生任何操作。请帮忙，非常感谢

-(void)longPress:(id)sender {
[removeSticker setHidden:NO];
}

请查看随附的屏幕截图：

对于上面的屏幕截图，瓶子和西瓜是

*holderView

。 我先添加了瓶子，然后添加了西瓜，但是当我点击瓶子时，

[removeSticker setHidden:NO]出现在西瓜而不是瓶子里

[Removestcker setHidden:否]仅显示在最新添加的
*holderView
上，来自：

“一个视图同时只能有一个superview。”

因此，如果将一个视图作为子视图添加到另一个视图中，该子视图将从其以前的superview中删除并添加到新的superview中。（请参阅addSubview方法的文档）

（考虑一下为什么UIView有一个UIView*superview类型的@属性，而不是名为superviews的NSArray[复数]）

编辑：如果确实希望在多个超级视图中包含多个视图，则必须创建UIView的多个实例，并将多个实例添加到各个超级视图中。您还需要处理相应的UIView实例，因此您可以将它们添加到NSArray，并使用NSDictionary管理该阵列。
您所说的“仅出现在最新添加的UIView*holderView”是什么意思？你能解释更多吗？@Canopus我已经更新了我的问题，非常感谢。