iOS 返回到根目录实现

//返回到上一个视图，比如用户单击导航栏的Back按钮
[[self navigationController] popViewControllerAnimated:YES]
//返回到根视图
[[self navigationController] popToRootViewControllerAnimated:YES];
//返回到任意视图
[[self navigationController] popToViewController:destiationViewController animated:YES];

或者说要从一个viewctrollerA中的一个按钮跳转到别的viewcrollerB中，然后从viewcrollerB可以点击返回后返回到主页，

实现方法就是先强制转换到根目录，然后利用根目录的方法调用，进入别的页面

AppDelegate *app = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[self backToFront];
UINavigationController *nav = (UINavigationController *)app.window.rootViewController;
[nav popToRootViewControllerAnimated:NO];
IndexViewController *index=(IndexViewController *)nav.topViewController;
UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
btn.tag=3;
[index menuAction:btn];

- (void)backToFront {
[self dismissModalViewControllerAnimated:YES];
}