RegisterViewController *registerViewController = [RegisterViewController new];
[self.NavigationController pushViewController:registerViewController animated:YES];

//返回到根視圖
[self.navigationController popToRootViewControllerAnimated:YES];
//返回到指定視圖
for (UIViewController *controller in self.navigationController.viewControllers) {
    if ([controller isKindOfClass:[LoginViewController class]]) {
       [self.navigationController popToViewController:controller animated:YES];
    }
}

這種采用壓棧和出棧進(jìn)行頁面跳轉(zhuǎn)的方式，就是出入棧跳轉(zhuǎn)。

SelectViewController * selectViewController = [[SelectViewController alloc] init];        
//把當(dāng)前控制器作為背景
self.definesPresentationContext = YES;
//設(shè)置模態(tài)視圖彈出樣式
selectViewController.modalPresentationStyle = UIModalPresentationOverFullScreen;
[self presentViewController:selectViewController animated:YES completion:nil];

[self dismissViewControllerAnimated:YES completion:NULL];

模態(tài)跳轉(zhuǎn)主要在：收集用戶輸入信息，臨時(shí)展示一些內(nèi)容，顯示一個(gè)新的view層級(jí)等時(shí)候會(huì)用到。