iOS 图片添加阴影效果

图片阴影

Code

    imageView.layer.shadowColor = [UIColor greenColor].CGColor;//阴影颜色
    imageView.layer.shadowOffset = CGSizeMake(0, 0);//偏移距离
    imageView.layer.shadowOpacity = 0.5;//不透明度
    imageView.layer.shadowRadius = 10.0;//半径
    

圆形图片设置阴影（补充）

超过子图层的部分裁减掉,所以给圆角的图片设置阴影会被裁掉
view.layer.masksToBounds=YES

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设置图片圆角阴影

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    
    self.view.backgroundColor = [UIColor whiteColor];
    
    UIView *view2 = [[UIView alloc] init];
    view2.backgroundColor = [UIColor clearColor];
    view2.frame = CGRectMake(90, 150, 200, 200);
    
    view2.layer.shadowOpacity = 0.8;
    view2.layer.shadowOffset = CGSizeMake(0, 3);
    view2.layer.shadowRadius = 10;

    
    UIView *view1 = [[UIView alloc] init];
    view1.frame = CGRectMake(0, 0, 200, 200);
    view1.layer.masksToBounds = YES;
    view1.layer.cornerRadius = view1.frame.size.width/2;
    view1.backgroundColor = [UIColor yellowColor];
    view1.layer.contents = (id)[UIImage imageNamed:@"wenli.png"].CGImage;;
    
    
    [self.view addSubview:view2];
    [view2 addSubview:view1];
    
    
}