IOS。如何在每个 UIViewController 上启用和禁用旋转？
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iOS. How to enable and disable rotation on each UIViewController?
提问by Bao Tuan Diep
I have an UIViewController, I want to disable or enable rotation of the screen in different scenarios
我有一个 UIViewController，我想在不同场景下禁用或启用屏幕旋转
Example:
例子：
if flag {
rotateDevice = false
}
else {
rotateDevice = true
}
How can I do that?
我怎样才能做到这一点？
回答by Bao Tuan Diep
I have the answer.
On AppDelegate, if you rotate device, push viewcontroller, etc. This function always call
我有答案。On AppDelegate，如果你旋转设备，推视图控制器等。这个函数总是调用
Update for swift 3/4
快速 3/4更新
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask
{
return self.restrictRotation
}
self.restrictRotationis a custom parameter.
self.restrictRotation是自定义参数。
How to use:
如何使用：
In Appdelegate:
在 Appdelegate 中：
var restrictRotation:UIInterfaceOrientationMask = .portrait
In ViewController:
在视图控制器中：
When method ViewDidLoad or viewWillAppear is called. We will change like this:
当调用方法 ViewDidLoad 或 viewWillAppear 时。我们会像这样改变：
(UIApplication.shared.delegate as! AppDelegate).restrictRotation = .all
and then this method on AppDelegate will be called.
然后将调用 AppDelegate 上的此方法。
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask
回答by Julien Quere
You simply have to implement shouldAutorotateand supportedInterfaceOrientationsinto your UIViewController. Take a look at this documentation. For example:
您只需实现shouldAutorotate并supportedInterfaceOrientations进入您的UIViewController. 看看这个文档。例如：
override func shouldAutorotate() -> Bool {
return true
}
You can also specify which orientations are available. Here is an example with only portraits orientations:
您还可以指定哪些方向可用。这是一个只有纵向方向的示例：
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return .Landscape
}
Edit: If you want to support different orientation regarding a flag, you just have to do something like this:
编辑：如果你想支持关于标志的不同方向，你只需要做这样的事情：
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
if myFlag {
return .Landscape
} else {
return .All
}
}
(If myFlagis true, it will allow Landscapeorientation. Otherwise, it will allow all orientations).
（如果myFlag为真，它将允许Landscape定向。否则，它将允许所有定向）。
回答by Baryon Lee
swift 4
迅捷 4
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
get {
return .portrait
}
}
回答by Reimond Hill
In swift 5, as from previous, if you want to allow (avoid others) a particular UIViewController to rotate in a certain orientation you have to override "supportedInterfaceOrientations" inside your UIViewController class like so:
在 swift 5 中，和以前一样，如果您想允许（避免其他人）特定的 UIViewController 以特定方向旋转，您必须像这样覆盖 UIViewController 类中的“supportedInterfaceOrientations”：
class MyViewController:UIViewController{
override var supportedInterfaceOrientations: UIInterfaceOrientationMask{
get{
return .portrait
}
}
}
Here there are the possible options:
这里有可能的选项：
public struct UIInterfaceOrientationMask : OptionSet {
public init(rawValue: UInt)
public static var portrait: UIInterfaceOrientationMask { get }
public static var landscapeLeft: UIInterfaceOrientationMask { get }
public static var landscapeRight: UIInterfaceOrientationMask { get }
public static var portraitUpsideDown: UIInterfaceOrientationMask { get }
public static var landscape: UIInterfaceOrientationMask { get }
public static var all: UIInterfaceOrientationMask { get }
public static var allButUpsideDown: UIInterfaceOrientationMask { get }
}
Extended
扩展
If you want to be able to distinguish between iPad or iPhone you could use UIUserInterfaceIdiom:
如果您希望能够区分 iPad 或 iPhone，您可以使用 UIUserInterfaceIdiom：
override var supportedInterfaceOrientations: UIInterfaceOrientationMask{
get{
return UIDevice.current.userInterfaceIdiom == .phone ? [.portrait, . portraitUpsideDown]:.all //OBS -> You can also return an array
}
}
where:
在哪里：
public enum UIUserInterfaceIdiom : Int {
case unspecified
@available(iOS 3.2, *)
case phone // iPhone and iPod touch style UI
@available(iOS 3.2, *)
case pad // iPad style UI
@available(iOS 9.0, *)
case tv // Apple TV style UI
@available(iOS 9.0, *)
case carPlay // CarPlay style UI
}
回答by catanore
An easy solution for the most common request (iPhone: portrait, iPad: all) in your AppDelegate:
最常见请求（iPhone：纵向，iPad：全部）的简单解决方案AppDelegate：
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
return UIDevice.current.userInterfaceIdiom == .phone ? .portrait : .all
}
回答by NGR
set device orientarion portrait in Target -> General -> Deployment Info -> Portrait
在 Target -> General -> Deployment Info -> Portrait 中设置设备方向肖像
