支持横屏的设备才收到监听，并准确判断当前屏幕方向

// 监听屏幕旋转通知（因为监听的是状态栏的方向变化，所以只有支持横屏的设备才会收到通知） [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(doRotateAction:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil]; #pragma mark - 屏幕旋转监听后方法 - (void)doRotateAction:(NSNotification *)notification { // 此时根据当前的设备方向来判断是横屏还是竖屏更加准确 if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) { // 竖屏 } else if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft || [[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight) { // 横屏 } }