ios - 如何在 Swift 中制作渐变圆形路径
<p><p>我想创建一个如下图所示的渐变圆形路径:</p>
<p> <a href="/image/66iwr.png" rel="noreferrer noopener nofollow"><img src="/image/66iwr.png" alt="enter image description here"/></a> </p>
<p>我有以下代码:</p>
<pre><code> circularPath = UIBezierPath(arcCenter: .zero, radius: radius, startAngle: 0, endAngle: .pi * 2, clockwise: true)
outerTrackShapeLayer = CAShapeLayer()
outerTrackShapeLayer.path = circularPath.cgPath
outerTrackShapeLayer.position = position
outerTrackShapeLayer.strokeColor = outerTrackColor.cgColor
outerTrackShapeLayer.fillColor = UIColor.clear.cgColor
outerTrackShapeLayer.lineWidth = lineWidth
outerTrackShapeLayer.strokeEnd = 1
outerTrackShapeLayer.lineCap = CAShapeLayerLineCap.round
outerTrackShapeLayer.transform = rotateTransformation
addSublayer(outerTrackShapeLayer)
innerTrackShapeLayer = CAShapeLayer()
innerTrackShapeLayer.strokeColor = innerTrackColor.cgColor
innerTrackShapeLayer.position = position
innerTrackShapeLayer.strokeEnd = progress
innerTrackShapeLayer.lineWidth = lineWidth
innerTrackShapeLayer.lineCap = CAShapeLayerLineCap.round
innerTrackShapeLayer.fillColor = UIColor.clear.cgColor
innerTrackShapeLayer.path = circularPath.cgPath
innerTrackShapeLayer.transform = rotateTransformation
let gradient = CAGradientLayer()
gradient.frame = circularPath.bounds
gradient.colors =
gradient.position = innerTrackShapeLayer.position
gradient.mask = innerTrackShapeLayer
addSublayer(gradient)
</code></pre>
<p>但它不能正常工作，你可以在下图中看到结果:</p>
<p> <a href="/image/iveeN.png" rel="noreferrer noopener nofollow"><img src="/image/iveeN.png" alt="enter image description here"/></a> </p>
<p>如果有人帮助我，我将不胜感激，谢谢。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>看起来渐变层框架设置为等于路径框架，不包括 CAShapeLayer 的笔划厚度，这就是为什么它被截断为正方形。我无法从代码中看到 subview 上是否有圆形路径，但是如果将渐变框架设置为与应该对截断进行排序的 subview 框架相同，以及轨道上进度 View 的错位.</p>
<p>希望对您有所帮助。</p></p>
<p style="font-size: 20px;">关于ios - 如何在 Swift 中制作渐变圆形路径，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/54223709/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/54223709/
</a>
</p>
页:
[1]