WikiServer shows a button bar above the keyboard. How this happens is by catching the NSNotification for keyboard will show
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setupKeyboardObservers
	| defaultCenter selectorString nameString |

		selectorString := 'keyboardWillShow:'.
		nameString := ObjectiveCBridge fetchObjectCObjectConstantCalled: 'UIKeyboardWillShowNotification'.
		defaultCenter :=  (ObjectiveCBridge classObjectForName: #NSNotificationCenter) defaultCenter.
		self squeakProxy addSigViaString: selectorString aSignature: 'v@:@'.
		defaultCenter addObserver: squeakProxy squeakProxy 
			selector: (ObjectiveCBridge findSelectorCalled: selectorString) 
			name: nameString 
			object: 0.
			
		selectorString := 'keyboardWillHide:'.
		nameString := ObjectiveCBridge fetchObjectCObjectConstantCalled: 'UIKeyboardWillHideNotification'.
		defaultCenter :=  (ObjectiveCBridge classObjectForName: #NSNotificationCenter) defaultCenter.
		defaultCenter addObserver: self prPageViewController
			selector: (ObjectiveCBridge findSelectorCalled: selectorString) 
			name: nameString 
			object: 0.
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In the proxy we have more work: 
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keyboardWillShow: aNotfication
	| keyboardKey keyboard keyboardSize |
	
	self keyboardShows: true.
	keyboardKey := ObjectiveCBridge fetchObjectCObjectConstantCalled: 'UIKeyboardBoundsUserInfoKey'.
	keyboard := aNotfication userInfo objectForKey: keyboardKey.
	keyboardSize := keyboard CGRectValue.
	 keyboardSize primitiveChangeClassTo: CGRect new.
	keyboardHeight := keyboardSize height.

? Actually we don't implement keyboardWillHide: in Smalltalk we cheat and implement in on the prPageViewController Objective-C class
We also then in postLockProcessing  call keyboardWillShowInPRPageEditView: keyboardHeightValue  which does the magic of moving the 
button bar into place. 



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