NSThread and UIViewController Interaction

Question

If I create a new stream and then inside it, I push the new controller to my UINavigationController using such code ...

(a) does not work

-(void)myCallbackInThread
{
    // move on...
    UIApplication* app = [UIApplication sharedApplication];
    [app changeView];
}

then I find that the view appears, but does not respond to user input.

If I changed code like this

(b) works

-(void)myCallbackInThread
{
    // move on...
    UIApplication* app = [UIApplication sharedApplication];
    [app performSelectorOnMainThread:@selector(moveToMain) withObject:nil waitUntilDone:FALSE];
}

Then everything works fine.

Any clues on why?

Answer 1

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, GUI . . ( , ..), (. NSRunLoop .)

Answer 2

iPhone

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, -, , .

Answer 3

: " , ".

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Answer 4

UI- UIKit AppKit . , , , , , -, , .

- , , .