Resizing a UIView on iPhone at run-time

I'm trying to resize my app's view whenever an iAd is scrolled down from the top. The problem is that in run-time, when i set the resized frame size of the relevant view, the resizing doesnt happen 9so the iAd is draw on top of the top 50 vertical pixels).

If I set the UIView size at design-time, then I see that the view is resized (when i run the app).

So what am i doing wrong at run-time that is causing my resizing to not occur?

The structure of my controller's NIB looks like this:

> > View

>   > View (associated with IB 'contentView')

>     > CustomView (UIView)

>        - ScrollView

>        - Toolbar (top)

>        - Toolbar (bottom)

In code the adBannerView is added like this: [self.view addSubView:adBannerView];

conteView's origin.y and size.height is what im updating (to make it y = 50, and开发者_如何学C height = original height - 50). This should scale it down so that enough room is made to dispaly the banner on top (50 pixels in height).

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Are you sure the view is not nil? Did you hook it up in Interface Builder? If you're calling -setFrame on the view and nothing is happening, it's likely the view is not valid.

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I resolved my issue, though in a work-around way. I think the problem was that my view layout tree was quite complicated. Ex, i had a scrollviewer within a custom UIView. The scrollviewer was adding a UIView as its content at run-time. And on top of all this I was trying to resize various views.

But for some reason, the view(s) never managed to be bottom-justified (its always top-justified).