xcode back button

回上ㄧ頁

  

-(void) popCurrentViewController
{
    [self.navigationController popViewControllerAnimated: YES];
}

回指定頁

  

- (void) backToAnotherViewController

    NSLog(@"%@",self.navigationController.viewControllers); //see array ex: home:1 menu:2
    
    [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];
}