30 lines
917 B
Swift
30 lines
917 B
Swift
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import UIKit
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@objc(WMFGradient)
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public class Gradient: NSObject {
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fileprivate var r1: CGFloat = 0
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fileprivate var g1: CGFloat = 0
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fileprivate var b1: CGFloat = 0
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fileprivate var a1: CGFloat = 0
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fileprivate var r2: CGFloat = 0
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fileprivate var g2: CGFloat = 0
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fileprivate var b2: CGFloat = 0
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fileprivate var a2: CGFloat = 0
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init(startColor: UIColor, endColor: UIColor) {
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startColor.getRed(&r1, green: &g1, blue: &b1, alpha: &a1)
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endColor.getRed(&r2, green: &g2, blue: &b2, alpha: &a2)
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super.init()
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}
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@objc(colorAtPercentage:)
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public final func color(at percentage: CGFloat) -> UIColor {
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let r = r1 + percentage * (r2 - r1)
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let g = g1 + percentage * (g2 - g1)
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let b = b1 + percentage * (b2 - b1)
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let a = a1 + percentage * (a2 - a1)
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return UIColor(red: r, green: g, blue: b, alpha: a)
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}
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}
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