视图控制器未收到 -shouldAutorotateToInterfaceOrientation：第二次加载时的消息？

我有一个UIViewController我用它来控制“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，因为无论方向如何，它都会自动调整图像大小以正确适合。这工作得很好，但只是在我第一次初始化并显示视图控制器时。当它关闭时，我将删除UIView从我的视图层次结构中释放视图控制器 - 但下次我实例化并将其添加到我的视图层次结构中时，它会停止接收-shouldAutorotateToInterfaceOrientation旋转手机时发送消息。

这就是我实例化和显示它的方式：

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

这就是我在完成后删除/释放它的方式：

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

我尝试过循环[[UIApplication sharedApplication] keyWindow]子视图以查看我的弹出视图是否不在顶部，但它总是在顶部。而且它每次都有不同的地址，所以我确实知道它是视图控制器类的不同实例。

根据要求，这里是完整的loadView方法来自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];
}

The shouldAutorotateToInterfaceOrientationhandler 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您的视图控制器可以旋转。如果您想要自定义代码来处理旋转事件，您应该覆盖 -didRotateFromInterfaceOrientation或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:

See 自动旋转视图 http://developer.apple.com/iphone/library/featuredarticles/ViewControllerPGforiPhoneOS/AutorotatingViews/AutorotatingViews.html#//apple_ref/doc/uid/TP40007457-CH11-SW1在开发人员文档中。