Swift给View加上渐变色

怎么给view添加渐变色：

我们来创建一个View的扩展

extension UIView { 

//Colors：渐变色色值数组
func setLayerColors(_ colors:[CGColor])  {
        let layer = CAGradientLayer()
        layer.frame = bounds
        layer.colors = colors
        layer.startPoint = CGPoint(x: 0, y: 0)
        layer.endPoint = CGPoint(x: 1, y: 0)
        self.layer.addSublayer(layer)
    }
}

• 调用示例

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        let colors = [UIColor.red.cgColor,
                      UIColor.yellow.cgColor,
                      UIColor.blue.cgColor
        ]
        view.setLayerColors(colors)
    }
    
}

效果图