设置横竖频设备方向 软件方向

[UIDevice currentDevice].orientation == UIDeviceOrientationPortrait

获取设备的方向方法

1、UIDeviceOrientation是设备的方向，只能读取不能设置,

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 };

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait];

设置软件方向

2UIInterfaceOrientation是软件的方向，可以读取可以设置。

typedefNS_ENUM(NSInteger,UIInterfaceOrientation){     UIInterfaceOrientationPortrait           =UIDeviceOrientationPortrait,     UIInterfaceOrientationPortraitUpsideDown=UIDeviceOrientationPortraitUpsideDown,     UIInterfaceOrientationLandscapeLeft      =UIDeviceOrientationLandscapeRight,     UIInterfaceOrientationLandscapeRight     =UIDeviceOrientationLandscapeLeft };

注意：UIInterfaceOrientation的横屏的左边和右边跟UIDeviceOrientation刚好相反。

2、如果需要获取设备方向变化（UIDeviceOrientation）的消息的话，需要注册UIDeviceOrientationDidChangeNotification通知。

在注册通知时，需要先调用UIDevice的beginGeneratingDeviceOrientationNotifications方法

[[UIDevicecurrentDevice]beginGeneratingDeviceOrientationNotifications]; [notificationCenter addObserver:selfselector:@selector(deviceOrientationDidChange)name:UIDeviceOrientationDidChangeNotificationobject:nil];

同时，在结束时，需要移除改通知消息

[notificationCenter removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil]; [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];