Question

我试图同时为图像添加角落和阴影。如果我删除但我不能显示阴影。我删除了styles: []，但后来我失去了角落。如何解决？

masksToBonds

Answer 1

您可以设置 shadowPath属性来跟踪iconView路径的内容，并设置其角半径，如下所示：

UIImageView * iv = [UIImageView new];
iv.frame = CGRectMake(0, 0, 100, 50);
iv.backgroundColor = [UIColor redColor];
iv.layer.cornerRadius = 10.0f;
iv.image = [UIImage imageNamed:@"settings-120.png"];
iv.layer.cornerRadius = 10.0f;
iv.layer.shadowColor = [UIColor blackColor].CGColor;
iv.layer.shadowOffset = CGSizeZero;
iv.layer.shadowRadius = 3.0f;
iv.layer.shadowOpacity = 1.0f;
iv.layer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:iv.bounds cornerRadius:iv.layer.cornerRadius].CGPath;
[self.view addSubview:iv];

如果你想用 UIViewContentModeScaleAspectFill 设置一个图像（并没有溢出），那么将它嵌入一个支架，在支架上设置阴影并剪切图像：

UIView * holder = [UIView new];
holder.frame = CGRectMake(0, 0, 100, 50);
holder.layer.cornerRadius = 10.0f;
holder.layer.shadowColor = [UIColor whiteColor].CGColor;
holder.layer.shadowOffset = CGSizeZero;
holder.layer.shadowRadius = 3.0f;
holder.layer.shadowOpacity = 1.0f;
holder.layer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:holder.bounds cornerRadius:holder.layer.cornerRadius].CGPath;
[self.view addSubview:holder];

UIImageView * iv = [UIImageView new];
iv.frame = holder.bounds;
iv.layer.cornerRadius = holder.layer.cornerRadius;
iv.image = [UIImage imageNamed:@"settings-120.png"];
iv.contentMode = UIViewContentModeScaleAspectFill;
iv.clipsToBounds = true;
[holder addSubview:iv];

带角的UIImageView阴影不可见

1 个答案: