Question

// when i click the button i want an alert view to appear and then entring the login details , if the details are correct then move to next view else not. how to do this ?

// now when i click on the button alert view appears when myButton method ends. how to control the flow ?

- (IBAction)myButton:(id)sender
    {
        flag= [self alertview];

        if (flag)
        {
            SecondViewController *svc =[self.storyboard instantiateViewControllerWithIdentifier:@"vinay"];
            [svc setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
            [self presentViewController:svc animated:YES completion:nil];
        }
    }

-(int)alertview
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Login"
                                                    message:[NSString stringWithFormat:@"Enter Login ID and Password:"]
                                                   delegate:self cancelButtonTitle:@"Ok"
                                          otherButtonTitles:nil];
    flag=1;

    [alert setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput];
    [alert show];
    return flag;

}

Answer 1

What I have done to solve this is as below :

1. Need to conforms to the UIAlertViewDelegate protocol in your .h file
2. Then need to implement the delegate method for UIAlertView. Method is alertView:clickedButtonAtIndex:.
3. Then in method have to track down the button tapped using the button index and to access the text fields of alert view use NSString *pass = [alertView textFieldAtIndex:0].text; code. (Here the 0 is the first textbox)

Enjoy coding 🙂