怎么給view添加漸變色：

我們來創(chuàng)建一個(gè)View的擴(kuò)展

extension UIView { 

//Colors：漸變色色值數(shù)組
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)
    }
}

• 調(diào)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)
    }
    
}

效果圖

效果圖