Perform segue from delegate method - objective-c

Question

I have a segmented control which when clicked the user will be forced to enter a password.
After a successful check the modal screen should dismiss and in the controller with the segmented control a method is called and a segue should be performed to another controller.
The segue itself works but not after the login check. I think this is a problem with the "self"...
Code of delegate class:
#protocol LoginUserControllerDelegate
- (void)proceedAfterLogin:(BOOL)proceedToNextController;
#end
#interface LoginUserController : UIViewController {
IBOutlet UITextField *loginPWD;
id<LoginUserControllerDelegate> _delegate;
}
#property (nonatomic, retain) UITextField *loginPWD;
#property (nonatomic, assign) id<LoginUserControllerDelegate> delegate;
- (void)checkLogindata; // checks for correct password
#end
#implementation LoginUserController
#synthesize loginPWD;
#synthesize delegate = _delegate;
- (void)checkLogindata {
...
if ([tempDBPWD isEqualToString:tempLoginPWD]) {
if (_delegate != nil) {
[self dismissModalViewControllerAnimated:YES];
[_delegate proceedAfterLogin:YES];
}
}
...
}
#end
The segmented controller with the method:
#interface StartViewController : UIViewController <LoginUserControllerDelegate> {
UISegmentedControl *segmentedControl;
LoginUserController *_loginUserController;
}
#property (nonatomic,retain) IBOutlet UISegmentedControl *segmentedControl;
#property (nonatomic, retain) LoginUserController *loginUserController;
- (IBAction)segmentedControlIndexChanged:(id)sender;
#end
#implementation StartViewController
#synthesize segmentedControl;
#synthesize loginUserController = _loginUserController;
- (IBAction)segmentedControlIndexChanged:(id)sender
{
if (self.segmentedControl.selectedSegmentIndex == 0) {
// get delegate
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
UIStoryboard *storyboard = appDelegate.window.rootViewController.storyboard;
LoginUserController *loginUserControllerView = [storyboard instantiateViewControllerWithIdentifier:#"LoginUserViewID"];
loginUserControllerView.delegate = self;
// now show screen
[self presentModalViewController:loginUserControllerView animated:YES];
} else {
}
}
- (void)proceedAfterLogin:(BOOL)proceedToNextController
{
if (proceedToNextController) {
// yes, correct login now perform the segue to the controller
[[self segmentedControl] setSelectedSegmentIndex:UISegmentedControlNoSegment];
[self performSegueWithIdentifier:#"NextControllerSegueID" sender:self];
}
}
#end
I think the [self performSegueWithIdentifier:#"NextControllerSegueID" sender:self]; is the problem, because self is not correct. Is this where the error arises and how can I achieved my desired behaviour?

Answer 1

You're close, but you need to return to the delegate, and then call dismissModalViewControllerAnimated:YES. A modal controller can't dismiss itself, so you need to do your login, call back to the delegate, and have the delegate dismiss the modal controller.