Drew Olbrich
52 lines
1.6 KiB
Swift
52 lines
1.6 KiB
Swift
//
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// RoundedCornersImage.swift
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// Examples
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//
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// Created by Drew Olbrich on 12/24/18.
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// Copyright 2019 Oath Inc.
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//
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// Licensed under the terms of the MIT License. See the file LICENSE for the full terms.
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//
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import UIKit
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/// Returns an image containing a rounded corners rectangle with a filled region and
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/// outline.
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///
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/// - Parameters:
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/// - fillColor: The color to fill the rectangle with.
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/// - outlineColor: The color of the outline.
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/// - cornerRadius: The radius of the rounded corners.
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/// - outlineWidth: The stroke width of the outline.
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/// - Returns: A rounded corners rectangle image.
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func roundedCornersImage(fillColor: UIColor?, outlineColor: UIColor?, cornerRadius: CGFloat, outlineWidth: CGFloat = 1) -> UIImage? {
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let size = CGSize(width: cornerRadius*2, height: cornerRadius*2)
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let rect = CGRect(origin: .zero, size: size)
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UIGraphicsBeginImageContext(size)
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guard let context = UIGraphicsGetCurrentContext() else {
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return nil
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}
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context.clear(rect)
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if let fillColor = fillColor {
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context.setFillColor(fillColor.cgColor)
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context.fillEllipse(in: rect)
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}
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if let outlineColor = outlineColor {
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context.setStrokeColor(outlineColor.cgColor)
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context.strokeEllipse(in: rect.insetBy(dx: outlineWidth/2, dy: outlineWidth/2))
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}
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let image = UIGraphicsGetImageFromCurrentImageContext()
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UIGraphicsEndImageContext()
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let capInsets = UIEdgeInsets(top: cornerRadius, left: cornerRadius, bottom: cornerRadius, right: cornerRadius)
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return image?.resizableImage(withCapInsets: capInsets)
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}
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