導航欄丟失

Question

在按鈕單擊時推動kalviewcontroller時導航欄丟失。如何添加導航欄？這樣它可以彈出來查看控制器在哪裏按下按鈕點擊。

kal = [[[KalViewController alloc] init]autorelease]; 
kal.title = @"Calendar of game"; 

kal.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] 
initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self 
action:@selector(addEvent)] autorelease]; 
kal.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" 
style:UIBarButtonItemStyleBordered target:self action:@selector(backToPrevious)] 
autorelease]; 

kal.delegate = self; 
dataSource = [self init]; 
kal.dataSource = dataSource; 
[self.navigationController pushViewController:kal animated:YES]; 

Answer 1

把[self.navigationController setNavigationBarHidden:FALSE]你viewDidLoad（假設你已經創建導航控制器）。