Question

The application which runs smoothly on 4.0.1 when was tried on run on 4.2.1 produced distorted screen i.e., screen somewhat moved to left by 20%. Phones on which iOS 4.0.1 and 4.2.1 are installed are 2 different phones. What could be the problem?

We observed that wherever we have added as subview this problem is occurring.

Thanks,
Satish

Answer 1

From your description, I think it is either that you are not setting the correct view.autoresizingMask properly or there is a subtle change in how views are being laid out.

Try setting the frame of the view that moved explicitly and see what happens.

[view setFrame:CGRectMake(0, 0, 320, 460)]

Some related piece of code and/or screenshots would definitely help. Also, is it a UIKit application or a Cocos2D game?

---

EDIT: Since you can’t provide code (or a stripped-down example version) I’ll just post some code that I’ve been using.

Usually when I add subviews to “fill” a parent view, I had do the following:

UIView *parent = nil; // find parent view
UIView *child = nil; // child view to add to parent

[parent addSubview:child];

CGRect frame = [parent frame];
frame.origin.x = 0;
frame.origin.y = 0;
[child setFrame:frame];

If you have done that and it still does not work I believe the problem might lies somewhere else (i.e. have you overridden layoutSubviews by any chance? or was the phone jailbroken?)

I highly doubt it’ll be a UIKit bug though but it is totally possible.