Error when adding input view to textfield iOS 8

Question

I'm having an issue when I add a custom input view to my app on iOS 8. This was working perfectly fine on iOS 7 but when switching to iOS 8 everything fails.

This is the stack trace:

2014-06-03 21:23:54.237 MyApp[1910:47245] *** Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency', reason: 'child view controller:<UICompatibilityInputViewController: 0x1103f9d40> should have parent view controller:<StopChooser: 0x11083e200> but requested parent is:<UIInputWindowController: 0x110858800>' *** First throw call stack: (     0   CoreFoundation                      0x00000001042eee35 __exceptionPreprocess + 165     1   libobjc.A.dylib                     0x0000000103b919a0 objc_exception_throw + 45     2   CoreFoundation                      0x00000001042eed6d +[NSException raise:format:] + 205     3   UIKit                               0x00000001023d94cd -[UIViewController _addChildViewController:performHierarchyCheck:notifyWillMove:] + 184     4   UIKit                               0x0000000102977a2b -[UIInputWindowController changeToInputViewSet:] + 416     5   UIKit                               0x0000000102973f56 -[UIInputWindowController moveFromPlacement:toPlacement:starting:completion:] + 185     6   UIKit                               0x000000010297826a -[UIInputWindowController setInputViewSet:] + 526     7   UIKit                               0x0000000102973c97 -[UIInputWindowController performOperations:withAnimationStyle:] + 50     8   UIKit                               0x00000001027559bb -[UIPeripheralHost(UIKitInternal) setInputViews:animationStyle:] + 1054     9   UIKit                               0x0000000102422afd -[UIResponder becomeFirstResponder] + 468     10  UIKit                               0x00000001023235d3 -[UIView(Hierarchy) becomeFirstResponder] + 99     11  UIKit                               0x00000001029cdbfb -[UITextField becomeFirstResponder] + 51     12  UIKit                               0x0000000102655d61 -[UITextInteractionAssistant(UITextInteractionAssistant_Internal) setFirstResponderIfNecessary] + 177 lib: terminating with uncaught exception of type NSException     (lldb)  

The relevant part being the top few lines. Can someone explain this? All I'm calling is myTextview.inputView = keyboard; Keyboard being a UIView created in the storyboard and linked via IBOutlet.

Answer 1

I encountered this problem before.

Problem:

• You have to ensure that the view you will assign to inputView or inputAccessoryView doesn't belong to any parent view. When you create these views from a xib inside a ViewController, by default they are set as subviews of a superview.

Solution Tips:

• Use the method removeFromSuperview on the view you will assign to inputView or inputAccessoryView