ios - 如何在所有 View Controller 中显示可自定义的 View ?
<p><p>这个问题有点详细,我真正想知道什么。我想做一个应用程序,它的某些功能看起来像 SoundCloud 和 gaana。下面我展示一些 gaana 的截图。</p>
<p> <a href="/image/NrYbD.png" rel="noreferrer noopener nofollow"><img src="/image/NrYbD.png" alt="enter image description here"/></a> </p>
<p>在这里,如果我们单击任何歌曲,它们会自动更新上面的 View 并播放歌曲,并且此 View 将显示到所有 ViewController 中。单击此向上箭头按钮,它们如何显示一个新 View ,而以前的小 View 不在其中并将 Collection View 加载到这个新 View 中。如何执行所有这些操作?新 View 就在这里。</p>
<p> <a href="/image/HZMEp.png" rel="noreferrer noopener nofollow"><img src="/image/HZMEp.png" alt="enter image description here"/></a> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您可以通过创建叠加层来做到这一点,即将一个 <code>UIView</code> 作为子元素添加到应用程序的主 <code>window</code> 中,如下所示:</p>
<pre><code>override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
showOverlay()
}
func showOverlay() {
guard let window = UIApplication.shared.keyWindow else {
//if this block runs we were unable to get a reference to the main window
print("you have probably called this method in viewDidLoad or at some earlier point where the main window reference might be nil")
return
}
//add some custom view, for simplicity I've added a black view
let blackView = UIView()
blackView.backgroundColor = .black
blackView.translatesAutoresizingMaskIntoConstraints = false
blackView.frame = CGRect(x: 0, y: window.frame.height - 100, width: window.frame.width, height: 100.0)
window.addSubview(blackView)
}
</code></pre>
<p>现在这个 View 应该总是 float 在当前的<code>UIViewController</code></p>之上</p>
<p style="font-size: 20px;">关于ios - 如何在所有 ViewController 中显示可自定义的 View ?,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/44226359/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/44226359/
</a>
</p>
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