ios - 以编程方式截取图像
<p><p>我遇到了一种情况，我希望我的代码截取屏幕截图，但只截取屏幕的中间部分。</p>
<pre><code> @IBAction func savePhoto(_ sender: UIButton) {
// Does not go into program
let size = CGSize(width: view.frame.size.width, height: view.frame.size.height)
UIGraphicsBeginImageContextWithOptions(CGSize(width:1024.0,height: 1024.0), false, UIScreen.main.scale)
view.layer.render(in: UIGraphicsGetCurrentContext()!)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
UIImageWriteToSavedPhotosAlbum(newImage!, nil, nil, nil)
}
</code></pre>
<p>我确实尝试将其设置为 1024x1024 的屏幕截图，我认为这会起作用，但事实并非如此。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>试试这个，它对我有用。
希望，有帮助。 </p>
<pre><code>@IBAction func savePhoto(_ sender: UIButton) {
UIGraphicsBeginImageContextWithOptions(CGSize(width: self.view.frame.size.width, height: self.view.frame.size.height - 100), false, 0.0)
self.view.drawHierarchy(in: CGRect(x: 0, y: 0, width: 1024.0, height: 1024.0), afterScreenUpdates: true)
if let image = UIGraphicsGetImageFromCurrentImageContext() {
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
}
UIGraphicsEndImageContext();
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - 以编程方式截取图像，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/49865264/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/49865264/
</a>
</p>
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