Question

When click button, a popoverView embedded in NavigationView appear. My code is as follows:

  -(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];

}

导航 Popover的看法观点:

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

如果我触及3rdView Sub,Popover 观点消失了。

My Question is :

当我再次点击纽子时,我就看到最后的观点――3rd SubView notst SubView.。

Answer 1

Declare UINavigationController *navcontroller; in .h file

Create only onсe navcontroller with your root view controller, in viewDidLoad method, for example.

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

Show UIPopoverController with exist navigation stack

-(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]; }

Don tabes to release 物体

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

Answer 2

无需每次创建<条码>。删除与<代码>相同的方式。 MyStuffListViewController

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

友情链接