問題與基於導航模板

Question

HII每一個

我創建一個基於導航應用&我正在編程設計的屏幕，我需要有2個欄按鈕，即左barbutton項目&右側欄按鈕的項目，所以我必須使用以下在代碼 - （空）的loadView方法，但是當控制器進入的loadView方法，其崩潰,,任何一個可以告訴我，什麼是錯在這段代碼中，感謝名單提前

self.title = @"Add Item"; 
self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] 
initWithBarButtonSystemItem:UIBarButtonSystemItemCancel 
target:self action:@selector(cancel_Clicked:)] autorelease]; 

self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] 
initWithBarButtonSystemItem:UIBarButtonSystemItemSave 
target:self action:@selector(save_Clicked:)] autorelease]; 
self.view.backgroundColor = [UIColor groupTableViewBackgroundColor]; 

Answer 1

試試這個代碼

UIBarButtonItem *flipButton = [[UIBarButtonItem alloc] 
          initWithTitle:@"Flip"            
          style:UIBarButtonItemStyleBordered 
          target:self 
          action:@selector(flipView)]; 
self.navigationItem.rightBarButtonItem = flipButton; 
[flipButton release]; 

Answer 2

嘗試下面的代碼，

UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom]; 
[btn addTarget:self action:@selector(yourfunctionToCall:) forControlEvents:UIControlEventTouchUpInside]; 
btn.frame=CGRectMake(3, 2, 53, 30); 
UIBarButtonItem *btnBack=[[UIBarButtonItem alloc] initWithCustomView:btn]; 
self.navigationItem.leftBarButtonItem=btnBack; 
[btnBack release]; 
[btn release]; 

同樣的方式創建rightBarButtonItem

Answer 3

self.title = @"Add Item"; 
    UIBarButtonItem *cancelbutton = [[[UIBarButtonItem alloc] 
    initWithBarButtonSystemItem:UIBarButtonSystemItemCancel 
    target:self action:@selector(cancel_Clicked:)] autorelease]; 
self.navigationItem.leftBarButtonItem=cancelbutton; 
[cancelbutton release]; 

    UIBarButtonItem *savebutton = [[[UIBarButtonItem alloc] 
    initWithBarButtonSystemItem:UIBarButtonSystemItemSave 
    target:self action:@selector(save_Clicked:)] autorelease]; 
self.navigationItem.rightBarButtonItem=savebutton; 
[savebutton release];