以编程方式通过 uibutton 删除 uiview

Question

我被困在如何通过用户单击 uibutton 来删除 uiview，uibutton 在场景加载后立即加载。 uibutton 也没有得到响应。 我应该如何设置？请帮忙，非常感谢。

- (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];

    UIButton *removeSticker = [UIButton buttonWithType:UIButtonTypeCustom];
    removeSticker.frame = CGRectMake(0, 0, 200, 100);
    [removeSticker setImage:[UIImage imageNamed:@"cancel-disabled.png"] forState:UIControlStateNormal];
    [removeSticker addTarget:holderView action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [holderView addSubview: removeSticker];

    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];

    [parentPreviewView addSubview:holderView];
}

- (void) buttonClicked: (id)sender
{
    [self.view removeFromSuperview];
}

Answer 1

将目标从 holderView 更改为 self:

[removeSticker addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

并将删除视图的代码更改为以下内容：

[holderView removeFromSuperview];

Answer 2

使用以下技术。指定视图中每个控件的标签。

假设我将标签指定为 100，那么您可以从这个“标签”属性中受益。然后

 UIButtom *buttonToRemove=(UIButton*)[self.view   viewWithTag:100];

现在要删除它（按钮），请使用它

[buttonToRemove removeFromSuperview];