如何以编程方式确定iPhone界面方向？ [英] How to programmatically determine iPhone interface orientation?

问题描述

为 UIDevice.orientation 可能的值包括 UIDeviceOrientationFaceUp 和 UIDeviceOrientationFaceDown 。虽然知道设备是平的可能是有用的，但这并不告诉我们它是平面的，显示以纵向或横向模式定向的接口。在设备返回歧义信息的情况下，有没有办法找到GUI的当前方向？我想我可以跟踪定位的改变事件记得上次纵向/横向或检查的主要的UIView的边界高度和宽度，但似乎kludgey。 ？有没有我缺少的设备或UIView的一个属性。

The possible values for UIDevice.orientation include UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown. While it might be useful to know that the device is flat, this doesn't tell us whether it's flat displaying an interface oriented in portrait or landscape mode. Is there a way to find the current orientation of the GUI in cases where the device is returning ambiguous information? I suppose I could track orientation change events to remember the last portrait/landscape orientation or check the main UIView's bounds height and width, but that seems kludgey. Is there a property on the device or UIView that I'm missing?

推荐答案

在一个的ViewController你可以简单地使用的代码：

In a viewcontroller you can simply use the code:

UIInterfaceOrientation interfaceOrientation = self.interfaceOrientation;

的

UIInterfaceOrientation是一个枚举：

The UIInterfaceOrientation is an enum:

typedef enum {
  UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,
  UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,
  UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeLeft,
  UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeRight
} UIInterfaceOrientation;

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