-[UIViewController _keyboard]: unrecognized selector sent to instance 0x7b731ac0
I am writing an app with 3 viewControllers contained inside of a MainViewController. One of these is controlled through the storyboard and shows ads. The other two viewControllers are displaying information. Depending on the menu button pressed and the viewController to be presented the app determines which viewController to change. So far everything is working well except when ANY textField is selected. This causes the error to display. The instance is the viewController containing the textField, and is also the UIViewController named in the error. Also, the instance is not nil. I've placed a