Simulator Screen Shot - iPhone 11 Pro Max - 2020-01-07 at 15.54.28.png

iOS Swift 圆角阴影效果

 let yellowView = UIView.init(frame: CGRect(x: 30, y: 100, width: 200, height: 200))
        view.addSubview(yellowView)
        yellowView.backgroundColor = UIColor.yellow
        // 阴影不透明度
        yellowView.layer.shadowOpacity = 1.0
        // 阴影颜色
        yellowView.layer.shadowColor = UIColor.red.cgColor
        // 阴影的半径
        yellowView.layer.shadowRadius = 20.0
        // 阴影偏移量:正数向右 向下，负数向左向上
        yellowView.layer.shadowOffset = CGSize(width: 0, height: 0)
        // 圆角半径
        yellowView.layer.cornerRadius = yellowView.bounds.width / 2