ios - 默认纵向，一些特殊屏幕如何自动旋转或强制某些屏幕横向？
<p><p>在我的应用中，方向默认为纵向，但在某些特殊屏幕中，我希望 ViewController 自动旋转或强制方向为横向。</p>
<p>在 <strong>AppDelegate.swift</strong> 中:</p>
<pre><code>class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
// portrait by default
var interfaceOrientations:UIInterfaceOrientationMask = .portrait {
didSet{
// force to portrait
if interfaceOrientations == .portrait {
UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue,
forKey: "orientation")
}
// force to landscape
else if !interfaceOrientations.contains(.portrait){
UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue,
forKey: "orientation")
}
}
}
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
return interfaceOrientations
}
</code></pre>
<p>仅在纵向 vc 中:</p>
<pre><code>override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
appDelegate.interfaceOrientations = .portrait
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
appDelegate.interfaceOrientations = .portrait
}
</code></pre>
<p>在自动旋转的vc中:</p>
<pre><code>override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
appDelegate.interfaceOrientations = .allButUpsideDown
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
appDelegate.interfaceOrientations = .portrait
}
</code></pre>
<p>仅在横向 vc 中:</p>
<pre><code>override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
appDelegate.interfaceOrientations = [.landscapeLeft, .landscapeRight]
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
appDelegate.interfaceOrientations = .portrait
}
</code></pre>
<p>但它仍然有错误...帮助我</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>你应该强制旋转:</p>
<pre><code>UIDevice.current.setValue(UIInterfaceOrientation.landscapeLeft.rawValue, forKey: "orientation")
</code></pre>
<p>您还必须启用自动旋转</p>
<pre><code>override var shouldAutorotate: Bool{
return true
}
</code></pre>
<p>当然，在您的项目设置中，您必须同时启用纵向和横向模式。</p></p>
<p style="font-size: 20px;">关于ios - 默认纵向，一些特殊屏幕如何自动旋转或强制某些屏幕横向？，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/53205704/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/53205704/
</a>
</p>
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