pop到某一個特定的view

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]
NSMutableArray *allViewControllers = [NSMutableArray arrayWithArray:[appDelegate.navigationController viewControllers]];
for (UIViewController *aViewController in allViewControllers) {
    if ([aViewController isKindOfClass:[RequiredViewController class]]) {
        [self.navigationController popToViewController:aViewController animated:NO];
    }
}

自定義NavigationBar的Back鍵文字

UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil];

        [self.navigationItem setBackBarButtonItem:backItem];

        

        [self.navigationController pushViewController:detailViewController animated:YES];