xcode 4.5.1中的uinavigationcontroller警告

Question

我在xcode-4.2中進行了編碼，並更新了xcode-4.5.1之后，我的應用運行完美，同時單擊窗口進行導航時顯示以下錯誤。

Warning: Attempt to present <learnview: 0x8876220> on <UINavigationController: 0x8866e10> whose view is not in the window hierarchy!

我將功能從viewdidload（）更改為viewdidappear（）仍然顯示相同的錯誤？請幫我解決

編輯：

    -(void)goright
   {
    CATransition* transition = [CATransition animation];
    transition.duration = 1.5;
   transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
    transition.type = kCATransitionPush;
    learnview *lview=[[learnview alloc]initWithNibName:@"learnview" bundle:nil];
    transition.subtype = kCATransitionFromRight; //kCATransitionFromLeft, kCATransitionFromRight, kCATransitionFromTop, kCATransitionFromBottom
    [self.navigationController.view.layer addAnimation:transition forKey:nil];
   [[self navigationController] pushViewController:lview animated:NO];

    [imagetim invalidate];    
    }     

Answer 1

在viewWillAppear:或viewDidAppear:調用此方法viewDidAppear:

與動畫嘗試下面的代碼...

-(void)goright
{
    CATransition *animation = [CATransition animation];
    [animation setDelegate:self];   
    [animation setType:kCATransitionPush];
    [animation setDuration:1.5];
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:
                                  kCAMediaTimingFunctionEaseInEaseOut]];
    [animation setSubtype:kCATransitionFromRight];
    [[self.view layer] addAnimation:animation forKey:@"transitionViewAnimation"];

    learnview *lview=[[learnview alloc]initWithNibName:@"learnview" bundle:nil];
    [[self navigationController] pushViewController:lview animated:NO];

    [imagetim invalidate];    
}

如果沒有動畫，請嘗試以下代碼...

-(void)goright
    {

        learnview *lview=[[learnview alloc]initWithNibName:@"learnview" bundle:nil];

        [self.navigationController pushViewController:lview animated:YES];

        [imagetim invalidate];    
    }     

嘗試這個