How did iOS set UIViewController's view frame before shown? - ios

Question

I am not familiar with iOS UIViewController's detail implement. I have the following code to create a new UIViewController and show it, but the frame I set during initWithFrame method does not worked, the controller's view always is fullscreen(320*480).
UIViewController *viewController = [[UIViewController alloc] init];
// view
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 140, 130)];
viewController.view = view;
[view release];
AppController *app = (AppController*)[[UIApplication sharedApplication] delegate];
UINavigationController *nav = [app navController];
[nav pushViewController:viewController animated:YES];
[viewController release];
I search releative thoughts in apple developer documents, but I found nothing useful for this. How did UIViewController deal with its view frame property before show it? Where can I found useful documentation.
Thank you.
Update: In fact, the code is from cocos2d-iphone DirectorTest: https://github.com/cocos2d/cocos2d-iphone/blob/release-2.0-rc1/tests/DirectorTest.m#L143

Answer 1

You've got this all wrong - you really need to read (and understand) Apple's UIViewController docs:
View Controller Catalog
View Controller Programming Guide
View Controller Reference
If you're creating a view in code for a view controller, you should do it in the view controller's loadView method.
Directly from Apple's documentation:
Creating a View Programmatically
If you prefer to create views programmatically ...
you do so by overriding your view controller’s loadView
method. Your implementation of this method should do the following:
Create a root view object. The root view contains all other views
associated with your view controller. You typically define the frame
for this view to match the size of the app window, which itself should
fill the screen. However, the frame is adjusted based on how your view
controller is displayed. See “View Controller View Resizing.”
You can use a generic UIView object, a custom view you define, or any
other view that can scale to fill the screen.
Create additional subviews and add them to the root view. For each
view, you should do the following:
Create and initialize the view. For system views, you typically use
the initWithFrame: method to specify the initial size and position of
the view. Add the view to a parent view using the addSubview: method.
Assign the root view to the view property of your view controller.