相关疑难解决方法(0)

我有一个启动一个UIViewController一个UITableViewController,每当后退按钮在子控制器,这是从"的UIViewController"派生类按我想的陷阱.我可以更改后退按钮标题,但设置backBarButtonItem时设置目标和操作值似乎被忽略.有什么方法可以接收点按"后退"按钮的某种通知？

- (void)showDetailView 
{
    // How I'm creating & showing the detail controller
    MyViewController *controller = [[MyViewController alloc] initWithNibName:@"MyDetailView" bundle:nil];   

    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Pages"
                            style:UIBarButtonItemStyleBordered 
                            target:self                                     
                            action:@selector(handleBack:)];

    self.navigationItem.backBarButtonItem = backButton;
    [backButton release];

    [self.navigationController pushViewController:controller animated:animated];
    [controller release];

}   

- (void)handleBack:(id)sender
{
    // not reaching here
    NSLog(@"handleBack event reached");
}