Question

I’m a new iOS developer with a simple question: I want to programmatically move from one view controller to the next, how do I write this code?

So far I have:

UINavigationController *navigationController;
    navigationController = [[UINavigationController alloc] init];
    [self.view addSubview:navigationController.view];
    [navigationController pushViewController:viewController animated:NO];

I’m not even sure if this will work, ultimately, but my main question is “viewController” in line 4. The program doesn’t know what that is. It is the name of my current view controller, but how do I set it up so that it knows what I mean by viewController?

As an aside, the above is part of an if/else statement that occurs and is connected to the NSUserDefaults class to make it such that the view controller I am referring to only loads if terms and conditions have not previously been accepted. Will that work? Thanks.

Answer 1

First the simple answer: pass self when you want to pass the “current” object.

The more important consideration is: is that nav controller on screen? It’s likely that your code won’t do much unless you use a navigation controller which is (probably) the window’s root view controller.

This is fairly easy to setup in your storyboard (“embed in”->”navigation controller”) and then you don’t need to instantiate it in code, you simply use self.navigationController (usually).