iOS手机屏幕朝向和简单的获取屏幕方向的方法

1、对于iOS手机屏幕，苹果公司给出了一个枚举。

如：typedefNS_ENUM(NSInteger, UIDeviceOrientation) {

    UIDeviceOrientationUnknown,

    UIDeviceOrientationPortrait,           // 竖向，home键向下

    UIDeviceOrientationPortraitUpsideDown, // 竖向，home键向上

    UIDeviceOrientationLandscapeLeft,      // 横向，home键向右

    UIDeviceOrientationLandscapeRight,     // 横向，home键向左

    UIDeviceOrientationFaceUp,             // 屏幕平放，向上

    UIDeviceOrientationFaceDown            // 屏幕平放，向下

}

typedef NS_ENUM(NSInteger, UIInterfaceOrientation) {

    UIInterfaceOrientationUnknown            = UIDeviceOrientationUnknown,

    UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,

    UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,

    UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight,

    UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft

}

2、对于获取手机屏幕

（1） [[UIDevicecurrentDevice]beginGeneratingDeviceOrientationNotifications];

    dispatch_async(dispatch_get_main_queue(), ^{

        NSLog(@"=========%zd",[[UIDevicecurrentDevice]orientation]);

    });

    [[UIDevicecurrentDevice]endGeneratingDeviceOrientationNotifications];

（2）UIInterfaceOrientation orientation = [UIApplicationsharedApplication].statusBarOrientation;

3、对于当前手机是不是横屏或者竖屏的判断

（1）判断是否是竖屏

staticinlineBOOL UIDeviceOrientationIsPortrait(UIDeviceOrientation orientation){

    return ((orientation) ==UIDeviceOrientationPortrait || (orientation) ==UIDeviceOrientationPortraitUpsideDown);

}

（2）判断是否是横屏

staticinlineBOOL UIDeviceOrientationIsLandscape(UIDeviceOrientation orientation){

    return ((orientation) ==UIDeviceOrientationLandscapeLeft || (orientation) ==UIDeviceOrientationLandscapeRight);

}