adding multiple views to view controller inside a tab controller

Question

I have a tabview controller to which I added a UIViewController to each tab. I want to have multiple UIViews inside the UIViewController.

So in the implementation of the UIViewController class I added [self.view addSubView:uiview1] and [self.view addSubView:uiview2]. The problem is that when I run the app, it crahes on load.

However, if I only used a single UIView and did: self.view = UIView1 that would work fine.

Does anyone know what is causing the problem? Or if I'm doing something fundamentally wrong?

Answer 1

There's no reason you can't have multiple views within your UIViewController's main view member variable. However, there are quite a few items left unanswered in your question:

• How are you obtaining view1 and view2?
• Are they outlets in your XIB file (are you using a XIB file, or creating everything in code), or are you creating them in code?
• Where in your UIViewController subclass are you adding them to your view member variable?
• What's the message printed to the console when it crashes?

Answer 2

Assuming you are doing this programmatically, you're supposed to create the view in the view controller's loadView method. So you must do this:

self.view = [[[UIView alloc] initWithFrame:someFrame] autorelease];

before you do this:

[self.view addSubview:uiview1];
[self.view addSubview:uiview2];

Otherwise, self.view would be nil.