ios - UIImageView如何让图片自适应大小而且居右显示呢?

Question

如果我选择了UIViewContentModeScaleAspectFit这个自适应模式。大图图片正好自适应，但是居中显示了。

如果我选择UIViewContentModeRight居右模式。图片居右了。但是如果是大图。会超出容器，因为他没有自适应效果。

这个问题如何解决呢？

Answer 1

1. I don’t know if ContentMode supports OR operation, that is (you need to test this method),
   view.contentMode = UIViewContentModeScaleAspectFit|UIViewContentModeRight;

2. You can extend the UIImage method and crop the UIImage content starting from the right side,

   + (UIImage *)cropFromRight:(CGSize)size
   {
       // size是 UIImageView的大小
       // 根据宽高比,换算出裁剪区域大小,并执行裁剪然后返回 UIImage
   
   }
   

   Similarly, this method can be extended to center cropping, cropping from top, cropping from bottom, etc.

3. Settings:
   view.layer.masksToBounds = YES;//内容超出控件将不进行显示