UIDeviceOrientationDidChangeNotification和UIApplicationDidChangeStatusBarFrameNotification的區(qū)別

相同點：UIDeviceOrientationDidChangeNotification和UIApplicationDidChangeStatusBarFrameNotification一樣可以監(jiān)聽手機是否橫豎屏邦危。
區(qū)別： 當(dāng)全局禁掉自動旋轉(zhuǎn)屏幕的功能后府怯，手機旋轉(zhuǎn)UIApplicationDidChangeStatusBarFrameNotification不會再發(fā)出通知赘方。但UIDeviceOrientationDidChangeNotification會發(fā)出通知斑司，無論是否支持橫豎屏，都會發(fā)出通知昆稿。這樣可以方便的處理橫屏后的頁面顯示問題坊夫。
1.注冊通知

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(changeRotate:) name:UIApplicationDidChangeStatusBarFrameNotification object:nil];
- (void)changeRotate:(NSNotification*)noti {
    if ([[UIDevice currentDevice] orientation] == UIInterfaceOrientationPortrait
        || [[UIDevice currentDevice] orientation] == UIInterfaceOrientationPortraitUpsideDown) {
        //豎屏
        NSLog(@"豎屏");
    } else {
        //橫屏
         NSLog(@"橫屏");
    }
}

2.兩者在監(jiān)聽的方向的多少有區(qū)別
UIApplicationDidChangeStatusBarFrameNotification常見的幾種情況：

UIDeviceOrientationPortrait  
UIDeviceOrientationPortraitUpsideDown  
UIDeviceOrientationLandscapeLeft  
UIDeviceOrientationLandscapeRight 

UIDeviceOrientationDidChangeNotification

typedef enum {  
    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  
} UIDeviceOrientation; 

單頁面需要橫屏

//在UIApplication實現(xiàn)該方法
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    if(self.isFull){
        
        return UIInterfaceOrientationMaskAll;
    }
    return UIInterfaceOrientationMaskPortrait;
    
}

在需要支持橫屏的頁面修改isFull的值，并重寫方法

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(changeRotate:) name:UIApplicationDidChangeStatusBarFrameNotification object:nil];
    AppDelegate * appDelegate = [[UIApplication sharedApplication] delegate];
    appDelegate.isFull = YES;
    
 // 支持設(shè)備自動旋轉(zhuǎn)
- (BOOL)shouldAutorotate
{
    return YES;
}
// 支持橫豎屏顯示
-(UIInterfaceOrientationMask)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskAll;
}