Xcode9学习笔记8 - UIView视图添加阴影效果

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        let imageView = UIImageView(image: UIImage(named: "05"))
        imageView.frame = CGRect(x: 36, y: 80, width: 248, height: 164)

        let blackShadow = UIColor.black.cgColor  //设置图像视图的阴影颜色为黑色
        imageView.layer.shadowColor = blackShadow//设置图像视图的阴影颜色为黑色
        imageView.layer.shadowOffset = CGSize(width: 10.0, height: 10.0)//设置图像视图层阴影的横向和纵向偏移值
        imageView.layer.shadowOpacity = 0.45//设置图像视图层阴影透明度
        imageView.layer.shadowRadius = 5.0//设置图像视图层阴影半径大小

        self.view.addSubview(imageView)
    }