iOS-Charts 使用渐变填充 – 赵子一的博客

https://github.com/danielgindi/Charts/issues/186

chartDataSet.drawFilledEnabled = true
        let gradientColors = [UIColor.red.cgColor,UIColor.init(white: 1, alpha: 0).cgColor]
        let colorLocations:[CGFloat] = [1.0,0.0]
        let gradient = CGGradient.init(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: gradientColors as CFArray, locations: colorLocations)
        chartDataSet.fill = LinearGradientFill(gradient: gradient!,angle: 90)

chartDataSet.drawFilledEnabled = true

let gradientColors = [UIColor.red.cgColor,UIColor.init(white: 1, alpha: 0).cgColor]

let colorLocations:[CGFloat] = [1.0,0.0]

let gradient = CGGradient.init(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: gradientColors as CFArray, locations: colorLocations)

chartDataSet.fill = LinearGradientFill(gradient: gradient!,angle: 90)

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