NavigationController推出下一控制器同時pop自己本身

在UINavigationController中,經常會遇到在push下一級控制器時pop自己本身,這樣在下一控制器pop時,就會直接回到上上級的控制器.

UIViewController *newVC = [[UIViewController alloc] init];
NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:[[self navigationController] viewControllers]];
[viewControllers removeLastObject];
[viewControllers addObject:newVC];
[[self navigationController] setViewControllers:viewControllers animated:YES];