为 UIImageVIew 添加圆角并显示阴影效果

Question

我和这里的链接有同样的问题： Can't add a corner radius and a shadow

如果我设置 maskToBounds = YES，我得到圆角，但没有阴影 如果我设置 maskToBounds = NO，我会得到阴影，但没有圆角。

然后我按照上面链接中的说明设置 maskToBounds = NO，“而是设置角半径并使用圆角矩形设置阴影的贝塞尔路径。保持两者的半径相同”。但是，我没有得到圆角，也没有得到任何阴影！ （即没有阴影的方形图像）你能帮我解决这个问题吗？我不知道我做错了什么。提前致谢。

self.userImageView.backgroundColor = [UIColor redColor]; 
self.userImageView.clipsToBounds = NO; 
self.userImageView.contentMode = UIViewContentModeCenter; 
self.userImageView.layer.masksToBounds = NO; 

self.userImageView.layer.borderWidth = 1; 
self.userImageView.layer.borderColor = [[UIColor grayColor] CGColor]; 

self.userImageView.layer.shadowOpacity = 1; 
self.userImageView.layer.shadowColor = [[UIColor blackColor] CGColor]; 
self.userImageView.layer.shadowRadius = 8.0f; 
self.userImageView.layer.shadowOffset = CGSizeMake(-3, 0);
self.userImageView.layer.shouldRasterize = YES; 

self.userImageView.layer.shadowPath = [[UIBezierPath bezierPathWithRoundedRect:[self.userImageView bounds] cornerRadius:10.0f] CGPath]; 

[self addSubview:self.userImageView]; 

Answer 1

很遗憾，我认为 UIImageView 不能同时支持圆角和阴影。

但是，您可以在 UIImageView 的超级视图中制作阴影。

CGFloat cornerRadius = 3.0

UIView *container = [[UIView alloc] initWithFrame:aRect];
container.layer.shadowOffset = CGSizeMake(0, 0);
container.layer.shadowOpacity = 0.8;
container.layer.shadowRadius = 5.0;
container.layer.shadowColor = [UIColor redColor].CGColor;
container.layer.shadowPath = [[UIBezierPath bezierPathWithRoundedRect:container.bounds cornerRadius:cornerRadius] CGPath];

self.userImageView.layer.cornerRadius = cornerRadius;
self.userImageView.layer.masksToBounds = YES;
self.userImageView.frame = container.bounds;
[container addSubview:self.userImageView];
[self addSubview:container];