Swift修改按钮背景颜色渐变

let layer = CAGradientLayer()

      layer.frame = CGRect(x: 0, y: 0, width: (ScreenWidth - 24.S)/2, height: 36.S)//按钮所在区域

        layer.startPoint = CGPoint(x: 0, y: 0)

        layer.endPoint = CGPoint(x: 1, y: 1)

        let starColor = rgba(183, 138, 94, 1)

        let endColor = rgba(230, 177, 94, 1)

        layer.colors = [starColor.cgColor, endColor.cgColor]

        layer.locations = [0, 1]

        btn.layer.addSublayer(layer)将自定义的layer添加在btn的layer上面

显示效果图一