Qt defaults to creating a QWindow as offscreen surface if QPlatformIntegration::createPlatformOffscreenSurface returns 0. Using an offscreen surface is often done in a background thread, which is problematic, since then a QIOSWindow will also be created in a background thread. According to Apple docs, working with a UIView from other threads than the main thread should not be done. In our case, we instead hit an assert in QApplication that checks for the same. As a quick fix for Qt 5.2, we remove the offending call that causes the assert, since we anyway will call the same function lazily when becoming first responder. Task-number: QTBUG-35378 Change-Id: Id35462f99783a9748c688b163f6497de9bfff73e Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>