设置图片圆角加阴影效果

需要在我的界面将头像设置成悬浮阴影效果，但头像是圆角的，设置完成后发现要么有阴影无圆角，要么有圆角无阴影，查阅资料发现可以在layer上动手脚，代码如下：

CALayer *subLayer = [CALayerlayer];

    CGRect imgFrame =CGRectMake(SCREENWIDTH/2-40,20, 80,80);

    subLayer.frame = imgFrame;

    subLayer.cornerRadius =40;

    subLayer.backgroundColor = [UIColorblackColor].CGColor;

    subLayer.masksToBounds =YES;

    subLayer.shadowOffset =CGSizeMake(15,15);

    subLayer.shadowOpacity =0.8f;

    subLayer.shadowRadius =8;

    subLayer.masksToBounds =NO;

    

    [self.contentView.layeraddSublayer:subLayer];

    

    self.avatarImageView = [[UIImageViewalloc] initWithFrame:CGRectZero];

    UITapGestureRecognizer *tapGes = [[UITapGestureRecognizeralloc] initWithTarget:selfaction:@selector(imageTapAction)];

    self.avatarImageView.backgroundColor = [UIColorredColor];

    self.avatarImageView.layer.cornerRadius = 40;

    self.avatarImageView.layer.masksToBounds = YES;

    [self.avatarImageViewaddGestureRecognizer:tapGes];

    self.avatarImageView.userInteractionEnabled = YES;

    self.avatarImageView.layer.shadowColor = [UIColorblackColor].CGColor;

    self.avatarImageView.layer.shadowOffset = CGSizeMake(10,10);

    self.avatarImageView.layer.shadowOpacity = 0.8f;

    [self.contentViewaddSubview:self.avatarImageView];

上述代码中的 self 是自定义的一个 UITableViewCell，效果还可以。