ios - 从屏幕上删除UIViewController无效

我有一个带按钮的模式视图，单击后添加一个全屏视图控制器。在ios 4.3 sdk中，我被要求退出时已关闭(并使用push / pop控制器方法，并使用present / dismiss modalViews)。在新的ios 5 sdk中，它无法退出，viewController的parentViewController为nil并且卡住了。
有什么建议么？

添加代码:

 myTypeController* vc = [[myTypeController alloc] initWithSomeData:myData];
 vc.hidesBottomBarWhenPushed = YES
//This way
//[self.parentViewController presentModalViewController:vc animated:NO];
//Or that
 [self.parentViewController.navigationController pushViewController:vc animated:YES];
 [vc release];

和通常的删除方式

 [self.parentViewController dismissModalViewControllerAnimated:YES];

要么
[self.navigationController popViewControllerAnimated:YES];

最佳答案

iOS 5要求您使用presentingViewController:

if ([currentView parentViewController] != nil)
{
    // iOS 4
    self.isDismissingView = YES;
    [[currentView parentViewController] dismissModalViewControllerAnimated:animated];
}
else if ([currentView presentingViewController] != nil)
{
    // iOS5
    self.isDismissingView = YES;
    [[currentView presentingViewController] dismissModalViewControllerAnimated:animated];
}

ParentViewController

ios - 从屏幕上删除UIViewController无效