problem with navigation based template

hii every one

i am creating a navigation based application &a开发者_高级运维mp; i am designing screens programatically , i need to have 2 bar buttons ie left barbutton item & right bar button item so i have used following code in - (void)loadView method but its crashing when controller enters loadview method,,can any one tell me whats wrong in this code, thanx in advance

  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];

---

Try this code

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

---

Try following code,

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];

same way create for rightBarButtonItem

---

 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];