用户点击注销按钮时如何弹出所有视图并返回登录视图

Question

I use a navigation controller for login view.From there i push to a tabbar controller using this code

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UITabBarController *obj=[storyboard instantiateViewControllerWithIdentifier:@"tab"];
self.navigationController.navigationBarHidden=YES;
[self.navigationController pushViewController:obj animated:YES];

How can navigate back to login view when user tap logout from profile screen (one of the tabbar controller view). I want a navigation bar in the login view. Can anyone please help. I am using Storyboard.

Answer 1

You could use the following :-

//This would pop to the given VC
[self.navigationController popToViewController:loginViewController animated:YES];

//This would pop to the root VC
[self.navigationController popToRootViewControllerAnimated:YES]

Update:-

- (IBAction)loginBtn{

  UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

  //U provided UITabBarController so replace at with your tabBar controller class like below ,TabViewController class is created.
  TabViewController *obj=[storyboard instantiateViewControllerWithIdentifier:@"tabBar"];

  self.navigationController.navigationBarHidden=YES;   //navigation bar hidden so won't appear when back again to login if want to see then make it true in viewWillAppear/viewWillLoad.

  [self.navigationController pushViewController:obj animated:YES];
 }

Also for coming back from tabBar to login VC follow below,

- (IBAction)popbtn:(id)sender{
 [self.navigationController popToRootViewControllerAnimated:YES];
}

Also assgin the class to tabBar controller in storyboard along with storyboard id as below:-

Answer 2

Try this:

[[self.parentViewController navigationController] popToRootViewControllerAnimated:YES];

Since you are pushing a TabBarController , you will need to pop using the TabBarController. self.parentViewController should give you the TabBarController.

Answer 3

您只能使用一行代码。

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

Answer 4

id rootController = [[[[[UIApplication sharedApplication] keyWindow] subviews] objectAtIndex:0] nextResponder];
if([rootController isKindOfClass:[LoginViewController class]]){
    //do something
    [self.navigationController popToRootViewControllerAnimated:YES];
}
else{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    UIViewController *rootViewController = [storyboard instantiateViewControllerWithIdentifier:@"login"];
    [[UIApplication sharedApplication].keyWindow setRootViewController:rootViewController];
}