如何為UIPopOverController的導航欄設置標題？

Question

我正在使用iPad應用程序，它由PopOver組成。我需要顯示相機並捕獲圖像。為此，我正在使用AVFoundation Framework，其中沒有出現默認導航欄。因此，我按照以下步驟進行操作

cameraVC = [[CameraViewController alloc] initWithNibName:@"CameraViewController" bundle:nil ];
cameraVC.navigationItem.title = @"Take Photo";

UINavigationController *naviCon = [[UINavigationController alloc]initWithRootViewController:cameraVC];

UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:naviCon];
 self.popoverController = popover;
 self.popoverController.delegate = self;
 self.popover.popoverContentSize = CGSizeMake(450, 350);

[self.popoverController presentPopoverFromRect:CGRectMake(295, 40, 0, 0) inView:appDelegate.splitview.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

如果您曾經嘗試過，請告訴我哪里錯了。

Answer 1

如下修改代碼並檢查

cameraVC = [[CameraViewController alloc] init];

UINavigationController *naviCon = [[UINavigationController alloc]initWithRootViewController:cameraVC];

UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:naviCon];
 [self.presentPopOverController presentPopoverFromBarButtonItem:self.yourBarButton permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

然后在CameraViewController viewDidLoad方法中編寫以下代碼

self.navigationItem.title = @"your title";

Answer 2

如果沒有出現導航欄，請在cameraViewController中添加UIToolBar以執行所需的功能。

我在項目中執行了類似的操作，並在popOVer中獲得了NavigationBar。

        PageSelectorViewController *pageSelector=[[PageSelectorViewController  alloc]initWithStyle:UITableViewStylePlain] ;
        UINavigationController *navControl=[[UINavigationController alloc]initWithRootViewController:pageSelector];

        self.selectedPagesPopOver=[[UIPopoverController alloc]initWithContentViewController:navControl];
        [self.selectedPagesPopOver presentPopoverFromBarButtonItem:showPages permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

我想從自定義矩形中呈現popOver是問題，請嘗試從BarButton呈現，然后嘗試。

Answer 3

這可以幫助您...

MyController* controller = [[MyController alloc] initWithNibName:@"MyController" bundle:nil];
UINavigationController* navController = [[UINavigationController alloc] initWithRootViewController:controller];

controller.title = @"My Title"; //or you can put this line in MyController class viewDidLoad method as self.title = @"My Title";

controller.contentSizeForViewInPopover = CGSizeMake(320.0, 480.0);

_myPopover = [[UIPopoverController alloc] initWithContentViewController:navController];

[_myPopover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];