支持橫屏的設備才收到監聽，並準確判斷當前屏幕方向

// 監聽屏幕旋轉通知（因爲監聽的是狀態欄的方向變化，所以只有支持橫屏的設備纔會收到通知） [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(doRotateAction:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil]; #pragma mark - 屏幕旋轉監聽後方法 - (void)doRotateAction:(NSNotification *)notification { // 此時根據當前的設備方向來判斷是橫屏還是豎屏更加準確 if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) { // 豎屏 } else if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft || [[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight) { // 橫屏 } }