Xamarin iOS - Navigate to next text field with return key

Question

I couldn't find anything in the Xamarin documentation about navigating to the next text field in a series of text fields on a form, only a small tutorial on removing the keyboard.

To keep things simple I am using a txtUsername(tag 1) text field and a txtPassword(tag 2) text field. When I implement the following code, it isn't transferring to Xamarin Studio. Does anyone know the way this can be done code in Xamarin Studio, or alternatively if I can transfer the code from XCode to Xamarin Studio.

I am using the following code:

- (BOOL)textFieldShouldReturn:(UITextField *)txtUsername{
    NSLog(@"textFieldShouldReturn:");
    if (txtUsername.tag == 1) {
        UITextField *txtPassword= (UITextField *)[self.view viewWithTag:2];
        [txtPassword becomeFirstResponder];
    }
    else {
        [txtUsername resignFirstResponder];
    }
    return YES;
}

Thanks in advance

Answer 1

I think that the simplest way to do this is using the ShouldReturn method on your UITextFields with the BecomeFirstResponder method. For example, for a login form with Username and Password UITextFields, as follows (in your ViewDidLoad method):

Username = new UITextField();
Username.ReturnKeyType = UIReturnKeyType.Next;
Username.KeyboardType = UIKeyboardType.EmailAddress;
Username.ShouldReturn = (tf) =>
    {
        Password.BecomeFirstResponder();
        return true;
    };
View.Add(Username);

Password = new UITextField();
Password.SecureTextEntry = true;
Password.ReturnKeyType = UIReturnKeyType.Go;
Password.ShouldReturn = (tf) =>
    {
        // Do your login
        return true;
    };
View.Add(Password);

When you click next when the Username is active, it moves to the Password field. Clicking Go in the password field submits the form.