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43 lines
1.3 KiB
Swift
43 lines
1.3 KiB
Swift
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// GradientButton.swift
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// CovidSafe
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//
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// Copyright © 2020 Australian Government. All rights reserved.
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//
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import UIKit
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@IBDesignable
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class GradientButton: UIButton {
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let gradientLayer = CAGradientLayer()
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@IBInspectable
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var topGradientColor: UIColor?
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@IBInspectable
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var bottomGradientColor: UIColor?
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private func setGradient(topGradientColor: UIColor?, bottomGradientColor: UIColor?) {
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if let topGradientColor = topGradientColor, let bottomGradientColor = bottomGradientColor {
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gradientLayer.frame = bounds
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gradientLayer.colors = [topGradientColor.cgColor, bottomGradientColor.cgColor]
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gradientLayer.borderColor = layer.borderColor
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gradientLayer.borderWidth = layer.borderWidth
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gradientLayer.cornerRadius = layer.cornerRadius
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gradientLayer.startPoint = CGPoint(x: 0, y: 0)
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gradientLayer.endPoint = CGPoint(x: 1, y: 0)
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gradientLayer.locations = [0.0, 1.0]
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layer.insertSublayer(gradientLayer, at: 0)
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} else {
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gradientLayer.removeFromSuperlayer()
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}
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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setGradient(topGradientColor: topGradientColor, bottomGradientColor: bottomGradientColor)
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}
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}
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