Question

i am a fairly new iOS programmer, and I’ve lately been having trouble with my multi view app. Im using a paged based application with two view. I just don’t seem to be able to make an IBAction that allows me to switch between each view. i tried using:

[self presentModalViewController: SecondViewController animated: YES];

but i keep getting an error that says:

“use of undeclared identifier ‘SecondViewController’

Answer 1

use of undeclared xxx

So you should declare that FIRST.

Please follow these steps:

1. Create new file named SecondViewController and xib

2. In your first view controller, add the code to the head of the FirstViewController.m file to import the second view controller:

   #import “SecondViewController.h”

3. When you present the second view controller, you should initialize it first, you should write:

   SecondViewController *secondVC = [[SecondViewController alloc] initWithNibName:nil bundle:nil];

4. Now you can invoke your code but with the instance:

   [self presentModalViewController: secondVC animated: YES];

5. Do not forget cleaning up:

   [secondVC release];

Hope to help:)