iOS设置view渐变

image.png

func setGradient(colors: [CGColor], startPoint: CGPoint ,endPoint: CGPoint) -> CAGradientLayer {
        let gradientLayer: CAGradientLayer = CAGradientLayer()
        gradientLayer.colors = colors
        gradientLayer.startPoint = startPoint
        gradientLayer.endPoint = endPoint
        return gradientLayer
    }

使用：

        let startColor = UIColor.init(red: 228/255.0, green: 203/255.0, blue: 170/255.0, alpha: 1)
        let endColor = UIColor.init(red: 203/255.0, green: 155/255.0, blue: 91/255.0, alpha: 1)
        let gradientColors: [CGColor] = [startColor.cgColor, endColor.cgColor]
        let startPoint = CGPoint(x: 0, y: 0)
        let endPoint = CGPoint(x: 0, y: 1)
        let gradientLayer = header.setGradient(colors: gradientColors, startPoint: startPoint, endPoint: endPoint)
        gradientLayer.frame = header.bounds
        header.layer.insertSublayer(gradientLayer, at: 0)

因为我的视图渐变都是一样的效果，最后改造，一句代码调用解决：

func setRedGradient() {
        let startColor = UIColor.init(red: 228/255.0, green: 203/255.0, blue: 170/255.0, alpha: 1)
        let endColor = UIColor.init(red: 203/255.0, green: 155/255.0, blue: 91/255.0, alpha: 1)
        let gradientColors: [CGColor] = [startColor.cgColor, endColor.cgColor]
        let startPoint = CGPoint(x: 0, y: 0)
        let endPoint = CGPoint(x: 0, y: 1)
        let gradientLayer = self.setGradient(colors: gradientColors, startPoint: startPoint, endPoint: endPoint)
        gradientLayer.frame = self.bounds
        self.layer.insertSublayer(gradientLayer, at: 0)

        let gradientLayer: CAGradientLayer = CAGradientLayer()
        gradientLayer.colors = colors
        gradientLayer.startPoint = startPoint
        gradientLayer.endPoint = endPoint
    }

注意：

startPoint与endPoint分别为渐变的起始方向与结束方向，它是以矩形的四个角为基础的，
（0，0）为左上角、
（1，0）为右上角、
（0，1）为左下角、
（1，1）为右下角，
默认是值是（0.5，0）和（0.5，1）