解雇一个视图控制器并提出另一个viewController

Question

In my application, I have 4 UIViewcontrollers - A, B, C and D.

From my UIViewController A , UIVIewControllers B or C or D can be presented. Suppose, from A, i have presented B. Then, on B, there is are two UIButtons , clicking on which, i need to dismiss B and Present C or dismiss B and Present D. This is happening successfully, but first, after dismissing B, the screen of A comes, and then it goes to C or D.

Here's what i did:

On Button Press On B, the action is:

{
    UINavigationController *controller = (UINavigationController *)self.parentViewController;
    NSLog(@"%@",[controller parentViewController]);
    UITabBarController *tabBarReference = (UITabBarController *)[controller parentViewController];

    HomePageViewController *presController = (HomePageViewController *)tabBarReference.presentingViewController;
    [presController dismissTabControllerWithHandlerWithSenderAtIndex:1];
}

In A, i have these methods:

-(void)dismissTabControllerWithHandlerWithSenderAtIndex:(NSInteger)index
{
    if(index == 0)
    {
        [self dismissViewControllerAnimated:NO completion:^{

            [self aboutButtonPressed:self];

        }];
    }

    else
    {
        [self dismissViewControllerAnimated:NO completion:^{

            [self settingsButtonPressed:self];

        }];
    }
}

Here's the method i am calling..

- (IBAction)settingsButtonPressed:(id)sender
{
    [self.contactUsView setHidden:YES];

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    NSString *deviceType = [prefs objectForKey:@"DeviceType"];
    NSString *iOSType = [prefs objectForKey:@"iOSType"];

    if([iOSType isEqualToString:@"iOS7"])
    {
        if([deviceType isEqualToString:@"iPad"])
        {
            SettingsViewController *settingsPage = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iPad" bundle:NULL];
            settingsPage.modalTransitionStyle = UIModalTransitionStylePartialCurl;
            [self presentViewController:settingsPage animated:YES completion:NULL];
        }

        else
        {
            SettingsViewController *settingsPage = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController" bundle:NULL];
            settingsPage.modalTransitionStyle = UIModalTransitionStylePartialCurl;
            [self presentViewController:settingsPage animated:YES completion:NULL];
        }
    }

    else
    {
        if([deviceType isEqualToString:@"iPad"])
        {
            SettingsViewController *settingsPage = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iPad_iOS6" bundle:NULL];
            settingsPage.modalTransitionStyle = UIModalTransitionStylePartialCurl;
            [self presentViewController:settingsPage animated:YES completion:NULL];
        }

        else
        {
            SettingsViewController *settingsPage = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iOS6" bundle:NULL];
            settingsPage.modalTransitionStyle = UIModalTransitionStylePartialCurl;
            [self presentViewController:settingsPage animated:YES completion:NULL];
        }
    }
}

Answer 1

Ok here goes:-

Suppose viewcontroller A is the base & it presents either view controllers B or C.

Implement delegate/notifications where the view controller B or C has to be dismissed.

After sending the delegate or posting the notification, dismiss the current view controller without animation, ie animation:NO .

This notification that was posted needs to be heard in view controller A.

Here you present the next view controller.

EDIT:-

-(void)dismissTabControllerWithHandlerWithSenderAtIndex:(NSInteger)index
{
    if(index == 0)
    {
        [self dismissViewControllerAnimated:NO completion:nil];
        [self aboutButtonPressed:self];

    }

    else
    {

        [self dismissViewControllerAnimated:NO completion:nil];
        [self settingsButtonPressed:self];
    }
}