ios - UISlider 缩略图位置偏移
<p><p>我正在尝试使用自定义图像实现标准 UISlider。</p>
<p>目前看起来是这样</p>
<p> <a href="/image/bLQ9o.png" rel="noreferrer noopener nofollow"><img src="/image/bLQ9o.png" alt="enter image description here"/></a> </p>
<p>但我需要它看起来像这样</p>
<p> <a href="/image/lV0xZ.png" rel="noreferrer noopener nofollow"><img src="/image/lV0xZ.png" alt="enter image description here"/></a> </p>
<p>如何将缩略图向上偏移，以便只有尖端几乎不接触线？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>如果您想更改拇指图像的偏移量，您必须在自定义 <code>UISlider</code> 子类中覆盖 <code>thumbRectForBounds:trackRect:value:</code>。</p>
<pre><code>class CustomSlider: UISlider {
override func thumbRect(forBounds bounds: CGRect, trackRect rect: CGRect, value: Float) -> CGRect {
let originalRect = super.thumbRect(forBounds: bounds, trackRect: rect, value: value)
let yOffset: CGFloat = 16 // any value you want
let newY = originalRect.origin.y - yOffset
return CGRect(x: originalRect.origin.x, y: newY, width: originalRect.width, height: originalRect.height)
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - UISlider 缩略图位置偏移，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/45221860/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/45221860/
</a>
</p>
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