Iphone 删除UIButton的子视图

当用户按下按钮时，我一遍又一遍地运行同一段代码。如果用户按下按钮，按钮上方会出现一个图像，如果再次按下按钮，图像将从按钮子视图中删除

这是我的密码：

 UIImageView *overlay = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"OverlayImage.png"]];

    NSString *senderstag = [NSString stringWithFormat:@"%i", buttonFromSender.tag];
    if([[dictonaryOfImagesToDelete allKeys] containsObject:senderstag]){
        [[buttonFromSender subviews]makeObjectsPerformSelector:@selector(removeFromSuperview)]; 
    }
    else{
    [buttonFromSender addSubview:overlay];
    }
    NSString *imageName = [[NSString alloc]init];
    imageName = [arrayWithImageNames objectAtIndex:buttonFromSender.tag];

    [imagesToDelete addObject:imageName];

    [dictonaryOfImagesToDelete setObject:imagesToDelete forKey:[NSString stringWithFormat:@"%i", buttonFromSender.tag]];

我用字典来记录哪些按钮被按下了。与其移除按钮上的imageview，不如移除整个按钮。如何仅删除imageview而不删除按钮

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谢谢：D

如果您想为按钮状态显示不同的图像，您可以直接初始化按钮以加载处于该状态的图片。 例如，启用/禁用或选择/取消选择（正常）

参考资料：

背景图像： :

按钮图像：

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：

我最终制作了覆盖图的UIImageview，一个UIButton。这允许为其设置操作。以下是使用的代码：

        UIImage *image = [UIImage imageNamed:@"OverlayImage.png"];
    UIButton *overlay = [[UIButton alloc]init];
    overlay.frame = CGRectMake(0, 0, 100, 150);
    [overlay setImage:image forState:UIControlStateNormal];
    [overlay addTarget:self action:@selector(removeSelectedImage:) forControlEvents:UIControlEventTouchUpInside];
    overlay.tag = buttonFromSender.tag;


    [buttonFromSender addSubview:overlay];

    NSString *imageName = [[NSString alloc]init];
    imageName = [arrayWithImageNames objectAtIndex:buttonFromSender.tag];

    [imagesToDelete addObject:imageName];

    [dictonaryOfImagesToDelete setObject:imageName forKey:[NSString stringWithFormat:@"%i", buttonFromSender.tag]];

这将设置新的UIButton

然后，为了摆脱UIButton，我做了以下操作：

-(IBAction)removeSelectedImage:(id)sender{
UIButton *button = (UIButton *)sender;
[button removeFromSuperview];
NSString *tag = [NSString stringWithFormat:@"%i", button.tag];
NSString *deleteWhat = [[NSString alloc]init];
deleteWhat = [dictonaryOfImagesToDelete objectForKey:tag];
[imagesToDelete removeObject:deleteWhat];
[dictonaryOfImagesToDelete removeObjectForKey:tag];
}

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图像只是一个覆盖。你仍然可以看到它背后的大部分原始图像。它们是用户图像，所以我无法对它们进行photoshop

-(IBAction)removeSelectedImage:(id)sender{
UIButton *button = (UIButton *)sender;
[button removeFromSuperview];
NSString *tag = [NSString stringWithFormat:@"%i", button.tag];
NSString *deleteWhat = [[NSString alloc]init];
deleteWhat = [dictonaryOfImagesToDelete objectForKey:tag];
[imagesToDelete removeObject:deleteWhat];
[dictonaryOfImagesToDelete removeObjectForKey:tag];
}