Not work for app without storyboard/xib

[wizzardchao]

The -[UIApplication nextResponder] will not see an available window before didFinishLaunch if you start an app with manually window setup

[ian-mcdowell]

This should be an easy fix. We currently throw a fatal error if no windows are found. The easiest workaround is to silently fail, then require devs without a storyboard to call a method once they add their UIWindow.

[eholshouser]

The fix is to add a storyboard/xib to your project.