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);
}