點擊NavigationView中嵌入的彈出窗口後，如何看到最新的子視圖？

Question

單擊按鈕時，出現嵌入NavigationView中的popoverView。 我的代碼如下：

-(IBAction)myStuffPOP:(id)sender 
    { 
    if(myStuffListViewController ==nil) 
    {   
     myStuffListViewController = [[MyStuffListViewController alloc] init]; 
    } 
    UINavigationController *navcontroller=[[[UINavigationController alloc] initWithRootViewController:myStuffListViewController] autorelease]; 
// Here we create popover controller. 
    mystuffPopoverView = [[UIPopoverController alloc] initWithContentViewController:navcontroller] ; 
    CGRect popoverRect = [self.view convertRect:[sender frame] fromView:[sender superview]]; 

    popoverRect.size.width = MIN(popoverRect.size.width, 100); 
    popoverRect.size.height = 40; 

    [mystuffPopoverView presentPopoverFromRect:popoverRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES]; 

    [navcontroller setNavigationBarHidden:NO]; 

} 

在PopoverView的NavigationView：

1st subView ---> 2nd SubView ---> 3rd Subview 

如果我摸到3rd SubView，PopoverView消失。

我的問題是：

當我再次點擊按鈕，我想看到最新的視圖 - 3rd SubView not 1st SubView.

Answer 1

1. 聲明UINavigationController *navcontroller;在.h文件中

2. 僅創建與您的根視圖控制器， 在viewDidLoad方法onсenavcontroller，例如。

   - (void)viewDidLoad {  
       myStuffListViewController = [[MyStuffListViewController alloc] init]; 
       navcontroller=[[UINavigationController alloc] initWithRootViewController:myStuffListViewController]; } 
   

3. 顯示UIPopoverController與存在導航堆棧

   -(IBAction)myStuffPOP:(id)sender { 
       //Here we create popover controller. 
       mystuffPopoverView = [[UIPopoverController alloc] initWithContentViewController:navcontroller] ; 
       CGRect popoverRect = [self.view convertRect:[sender frame] fromView:[sender superview]]; 
   
       popoverRect.size.width = MIN(popoverRect.size.width, 100); 
       popoverRect.size.height = 40; 
   
       [mystuffPopoverView presentPopoverFromRect:popoverRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp 
   animated:YES]; 
       [navcontroller setNavigationBarHidden:NO]; } 
   

4. 不要忘記release對象

   - (void)dealloc { 
       [myStuffListViewController release]; 
       [navcontroller release]; 
   } 
   

Answer 2

無需創建每次UINavigationController。保存它以同樣的方式作爲MyStuffListViewController

if (myNavigationController == nil) 
    myNavigationController = [[[UINavigationController alloc]  initWithRootViewController:myStuffListViewController] autorelease];