给UIImageview 平添边框 或者设置成圆角

给UIImageview 添加边框 或者设置成圆角
代码如下

//给iamgeview添加阴影  和边框UIImageView * imgvPhoto = [UIImageView alloc] init];//添加边框CALayer * layer = [_imgvPhoto layer];layer.borderColor = [    [UIColor whiteColor] CGColor];layer.borderWidth = 5.0f;//添加四个边阴影_imgvPhoto.layer.shadowColor = [UIColor blackColor].CGColor;_imgvPhoto.layer.shadowOffset = CGSizeMake(0, 0);_imgvPhoto.layer.shadowOpacity = 0.5;_imgvPhoto.layer.shadowRadius = 10.0;给iamgeview添加阴影 < wbr > 和边框//添加两个边阴影_imgvPhoto.layer.shadowColor = [UIColor blackColor].CGColor;_imgvPhoto.layer.shadowOffset = CGSizeMake(4, 4);_imgvPhoto.layer.shadowOpacity = 0.5;_imgvPhoto.layer.shadowRadius = 2.0;