根据方向在 XIB 中切换视图

Posted 2023-03-10

【中文标题】根据方向在 XIB 中切换视图

【英文标题】：Switch View in XIB based on orientation

【发布时间】：2011-05-05 22:43:56

【问题描述】：

对于每个方向，我的 XIB 中有两个视图。它们相似但不同，所以我不能依赖自动调整大小。我想根据方向切换这些视图。当我使用方法 didRotateFromInterfaceOrientation 时，当它从 Portrait 旋转时，它将显示横向视图，当它旋转到 PortraitUpsideDown 时，这是一个问题。 如果我修改 willRotateToInterfaceOrientation 的代码，那么在 LandscapeView 中，PortraitView 对用户隐藏，但是当用户单击按钮时，它们不会显示为灰色以显示它们已被单击，并且它的应用程序响应就像用户正在单击按钮一样在纵向视图中。

我是否以正确的方式解决这个问题？我需要做什么来修复这些错误。我更喜欢使用 willRotateToInterfaceOrientation 方法。

谢谢，

代码：

- (void)viewDidLoad 
... 
    for (UIView *v in self.view.subviews) 
        v.autoresizingMask = UIViewAutoresizingNone;
    
...


- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
        return YES;
    

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation 

    if(fromInterfaceOrientation == UIInterfaceOrientationPortrait 
       || fromInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) 
        //Add landscape view
        if(![landscapeView superview])
            for (UIView *v in landscapeView.subviews) 
                v.autoresizingMask = UIViewAutoresizingNone;
            
            //No effect after testing
            [UIView beginAnimations:nil context:nil];
            [UIView setAnimationDuration:0.33];
            [self.view addSubview:landscapeView];
            [UIView commitAnimations];
        
    else 
        if([landscapeView superview])
            [landscapeView removeFromSuperview];
        
    


- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

    if(toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft 
       || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) 
        //Add landscape view
        if(![landscapeView superview])
            for (UIView *v in landscapeView.subviews) 
                v.autoresizingMask = UIViewAutoresizingNone;
            
            //No effect after testing
            [UIView beginAnimations:nil context:nil];
            [UIView setAnimationDuration:0.33];
            [self.view addSubview:landscapeView];
            [UIView commitAnimations];
        
    else 
        if([landscapeView superview])
            [landscapeView removeFromSuperview];
        

【参考方案1】：

在你看来确实加载了

[[NSNotificationCenter defaultCenter] addObserver:self
           selector:@selector(willRotateToInterfaceOrientation:)
           name:@"UIDeviceOrientationDidChangeNotification" object:nil];

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration 
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft) 
        viewControllerName *newView = [[viewControllerName alloc] initWithNibName:nil bundle:nil];
        newView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        [self presentModalViewController:newView animated:YES];
        [newView release];

    

    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight) 
        viewControllerName *newView = [[viewControllerName alloc] initWithNibName:nil bundle:nil];
        newView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        [self presentModalViewController:newView animated:YES];
        [newView release];

    

    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait) 
        viewControllerName *newView = [[viewControllerName alloc] initWithNibName:nil bundle:nil];
        newView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        [self presentModalViewController:newView animated:YES];
        [newView release];

    

    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) 
        viewControllerName *newView = [[viewControllerName alloc] initWithNibName:nil bundle:nil];
        newView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        [self presentModalViewController:newView animated:YES];
        [newView release];

    

【讨论】：

我应该保留我以前的代码吗？收到此错误：2011-08-17 19:56:13.527 Fraction Calculator Pro[3406:13103] -[Fraction_CalculatorViewController didRotate:]: unrecognized selector sent to instance 0x6341d50

对不起，我在[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willRotateToInterfaceOrientation:) name:@"UIDeviceOrientationDidChangeNotification" object:nil]; 中打错了，用更新版本的代码替换你之前的代码

并没有真正按照我的需要工作。始终以纵向显示应用程序而不显示横向视图。我有一个非常高级的设置。请求 Apple 的技术人员帮助我。不过感谢您的尝试。