设备的方向

iOS方向

1、UIDeviceOrientation

设备方向，只读。

typedefNS_ENUM(NSInteger,UIDeviceOrientation) {   UIDeviceOrientationUnknown,    UIDeviceOrientationPortrait,     // Device oriented vertically, home button on the bottom    UIDeviceOrientationPortraitUpsideDown,// Device oriented vertically, home button on the top    UIDeviceOrientationLandscapeLeft,  // Device oriented horizontally, home button on the right    UIDeviceOrientationLandscapeRight, // Device oriented horizontally, home button on the left    UIDeviceOrientationFaceUp,      // Device oriented flat, face up    UIDeviceOrientationFaceDown     // Device oriented flat, face down}__TVOS_PROHIBITED;

获取当前设备的方向：[UIDevice currentDevice].orientation;

2、UIInterfaceOrientation

软件方向，可读可写。

typedef NS_ENUM(NSInteger, UIInterfaceOrientation) {    UIInterfaceOrientationUnknown            = UIDeviceOrientationUnknown,    UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,    UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,    UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight,    UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft} __TVOS_PROHIBITED;

获取当前软件的方向：UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];

3、使用

当设备横屏时UIDeviceOrientation与UIInterfaceOrientation的方向刚好相反。

监听设备方向变化：

 //注册通知监听设备方向变化（注册通知前需要先调用beginGeneratingDeviceOrientationNotifications，当然结束时也需要调用endGeneratingDeviceOrientationNotifications） [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil];