swift - layer - 渐变色 - CAGradientLayer

 

1。创建 渐变色

   /// 渐变色：默认从上到下
    private var gradientLayer: CAGradientLayer = {
        let g = CAGradientLayer()
        g.colors = [UIColor.init(hexColor: "DBB479").cgColor,UIColor.init(hexColor: "F7E1B3").cgColor]
        //改为从左到右 的渐变
        g.startPoint = CGPoint(x: 0,y: 0)
        g.endPoint = CGPoint(x: 1,y: 0)
        return g
    }()

　　

2.给指定view 添加渐变色

    /// 荣誉背景图
    private lazy var credibilityBgView : UIView = {
        let v = UIView()
        v.layer.addSublayer(self.gradientLayer)
        v.translatesAutoresizingMaskIntoConstraints = false
        v.layer.cornerRadius = 5
        v.layer.masksToBounds = true
        v.isUserInteractionEnabled = true
        v.addGestureRecognizer(UITapGestureRecognizer(target: self,action: #selector(clcikCredibilityBgView)))
        return v
    }()

　　

3. 设置 渐变色frame

    override func draw(_ rect: CGRect) {
        super.draw(rect)
        gradientLayer.frame = credibilityBgView.bounds
    }