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视图控制器未获取-shouldautorotatePointerFaceOrientation:messages on second load?

rotation uiviewcontroller iphone

pix0r · 技术社区 · 15 年前

我有一个 UIViewController 我用来控制“弹出”视图,以便在整个应用程序中查看图像。它支持自动旋转,因为它会自动调整图像大小,以适合任何方向。这很好地工作,但只有在我第一次初始化和显示视图控制器时。当它关闭时,我将移除 UIView 从我的视图层次结构并释放视图控制器-但下次我实例化并将其添加到视图层次结构时,它将停止接收 -shouldAutorotateToInterfaceOrientation 手机旋转时的信息。

这就是我如何实例化和显示它:

popupVC = [[PopupVC alloc] init];
[popupVC viewWillAppear:NO];
[[[UIApplication sharedApplication] keyWindow] addSubview:popupVC.view];
[popupVC viewDidAppear:NO];

这是我在完成后移除/释放它的方式:

[popupVC viewWillDisappear:NO];
[popupVC.view removeFromSuperview];
[popupVC viewDidDisappear:NO];
[popupVC release];
popupVC = nil;

我试过循环通过 [[UIApplication sharedApplication] keyWindow] 子视图查看我的弹出视图是否不在顶部,但它总是在顶部。它每次都有不同的地址,所以我知道它是视图控制器类的不同实例。

按要求,这是完整的 loadView 方法从 PopupVC :

- (void)loadView {

    UIView *myView = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
    myView.backgroundColor = self.overlayColor;
    myView.autoresizesSubviews = NO;
    myView.hidden = YES;
    myView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    self.view = myView;
    [myView release];

    _isVisible = NO;

    UIView *myMaskView = [[UIView alloc] initWithFrame:self.view.bounds];
    myMaskView.backgroundColor = [UIColor clearColor];
    myMaskView.clipsToBounds = YES;
    myMaskView.hidden = YES;
    myMaskView.autoresizesSubviews = NO;
    myMaskView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    [self.view addSubview:myMaskView];
    self.imageMaskView = myMaskView;
    [myMaskView release];

    UIImageView *myImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
    myImageView.center = self.view.center;
    myImageView.hidden = NO;
    myImageView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleHeight;
    [self.imageMaskView addSubview:myImageView];
    self.imageView = myImageView;
    [myImageView release];

    UIButton *myImageButton = [UIButton buttonWithType:UIButtonTypeCustom];
    myImageButton.frame = self.view.frame;
    myImageButton.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleHeight;
    [myImageButton addTarget:self action:@selector(clickImage:) forControlEvents:UIControlEventTouchUpInside];
    [self.imageMaskView addSubview:myImageButton];
    self.imageButton = myImageButton;

    UIActivityIndicatorView *myActivityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    myActivityView.hidden = YES;
    [self.view addSubview:myActivityView];
    myActivityView.center = self.view.center;
    self.activityView = myActivityView;
    [myActivityView release];
}

3 回复 | 直到 15 年前

Jason Jenkins 15 年前

这个 shouldAutorotateToInterfaceOrientation 处理程序不是自定义代码响应旋转事件的地方。它的目的只是告诉操作系统你的视图控制器可以旋转。如果您希望有自定义代码来处理旋转事件,那么应该覆盖- didRotateFromInterfaceOrientation 或者其他类似的回调方法之一,具体取决于您的需要:

willRotateToInterfaceOrientation:duration:
willAnimateRotationToInterfaceOrientation:duration:
didRotateFromInterfaceOrientation:
willAnimateFirstHalfOfRotationToInterfaceOrientation:duration:
didAnimateFirstHalfOfRotationToInterfaceOrientation:
willAnimateSecondHalfOfRotationFromInterfaceOrientation:duration:

见 Autorotating Views 在开发人员文档中。

Jonathan Reyes 15 年前

我认为这可能是新的OS3.0中的一个bug。解决方法是在打开BeginGeneratingDeviceOrientationNotifications之后使用nsNotificationCenter。

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receivedRotate:) name:UIDeviceOrientationDidChangeNotification object:nil]; 
}

-(void) receivedRotate: (NSNotification *) notification {
    DebugLog(@"ORIENTATION CHANGE");

    UIDeviceOrientation interfaceOrientation = [[UIDevice currentDevice] orientation];

        if(interfaceOrientation == UIDeviceOrientationPortrait) {
            self.view.transform = CGAffineTransformMakeRotation(degreesToRadian(0));
            self.view.bounds = CGRectMake(0, 0, 320, 480);
        }
        else if(interfaceOrientation == UIDeviceOrientationLandscapeLeft) {
            self.view.transform = CGAffineTransformMakeRotation(degreesToRadian(90));
            self.view.bounds = CGRectMake(0, 0, 480, 320);
        }
        else if(interfaceOrientation == UIDeviceOrientationLandscapeRight) {
            self.view.transform = CGAffineTransformMakeRotation(degreesToRadian(-90));
            self.view.bounds = CGRectMake(0, 0, 480, 320);
        }
}

mobibob 15 年前

我的问题是,我得到了rootviewcontroller的旋转事件,但一旦我启动了第二个viewcontroller,它将不会得到任何信号,除了运动(震动)和触摸。这是不是和原来的帖子一样——当然是相似的??

我跟进了上面的建议,但没有正确地对选择器进行编码,所以当我尝试旋转时,它就会抛出一个异常。同时,我在网上发现了另一个讨论,它证实了这个问题是在3.0中引入的。 link text