无法在 ipad 应用程序中设置方向

Posted 2023-03-12

【中文标题】无法在 ipad 应用程序中设置方向

【英文标题】：Not able to set orientation in ipad app

【发布时间】：2013-01-16 11:18:46

【问题描述】：

我正在使用 ios6 版本来生成新的 Ipad 应用程序。在我的应用程序中，我正在创建一个拆分视图。该拆分视图必须始终处于横向模式。应用程序在 ipad 6.0 模拟器中运行。但不适用于 ipad 5.0 模拟器。我想同时运行 ipad 6.0 和 ipad 5.0 的应用程序。

我正在使用此代码

-(NSUInteger)supportedInterfaceOrientations

     return UIInterfaceOrientationMaskLandscape;


-(BOOL) shouldAutorotate 
     return NO;

【参考方案1】：

你可以在 ios6 中这样做：-

-(BOOL)shouldAutorotate

    return YES;

-(NSUInteger)supportedInterfaceOrientations


    return UIInterfaceOrientationMaskAll;

并检查每次ViewWillApear设备方向，如：-

- (void)willRotateToOrientation:(UIInterfaceOrientation)newOrientation 
        if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation))
        
            if (newOrientation == UIInterfaceOrientationLandscapeLeft || newOrientation == UIInterfaceOrientationLandscapeRight) 

              //set your landscap View Frame
                [self supportedInterfaceOrientations];

            



        
        else if (UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation))
        
            if(newOrientation == UIInterfaceOrientationPortrait || newOrientation == UIInterfaceOrientationPortraitUpsideDown)
      //set your Potrait View Frame
                [self supportedInterfaceOrientations];

            
        
        // Handle rotation
    


    -(void)viewWillAppear:(BOOL)animated
    
        [self willRotateToOrientation:[[UIDevice currentDevice] orientation]];  
        [super viewWillAppear:YES];
    

更新

可能人们使用检查设备orientation 如下方式将此行放入ViewWillApear:-

[[UIApplication sharedApplication] statusBarOrientation];
    [[UIDevice currentDevice] orientation];
    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceRotated:) name:UIDeviceOrientationDidChangeNotification object:nil];

和

-(void)deviceRotated:(NSNotification*)notification


    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
    
        //Do your stuff for landscap
    
    else if(orientation == UIInterfaceOrientationPortrait || toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)
    
      //Do your stuff for potrait

    

仅在 IOS5 中您可以执行如下操作：

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 

    if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight) 


        return YES;
    
    else
    
        return NO;
    


if you wish to support all oriantation you need to just return YES  like:-

 -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 

            return YES;  
    

【参考方案2】：

在 iOS 5.0 中你应该使用：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

    return interfaceOrientation == UIInterfaceOrientationMaskLandscape;

【讨论】：

只需将其放在问题中描述的方法旁边即可。

我认为这行不通。那行应该是：return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);

UIInterfaceOrientationMaskLandscape 定义为 (UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight)。查看 UIApplication 类参考。