Update README.md

[shatran]

add a condition to 'keyboardWillShow' to fix the example

[johanneslumpe]

@shatran just because i'm curious: when are there events for the keyboard which do not have endCoordinates? Does it fire multiple events where one has beginCoordinates? (Haven't used the native version)

[shatran]

I'm not sure when exactly these events are being fired, but more than one keyboardWillShow event is being fired when keyboard is shown, and not all of them has 'endCoordinates' as a field of the event.

[johanneslumpe]

@shatran Ok - seems rather weird though. Are you sure that you are not using the keyboard events module? If you take a look at https://github.com/facebook/react-native/blob/060664fd3d9331f062696e68179bac9cd4544a06/React/Base/RCTKeyboardObserver.m#L90 you will see that all events are processsed in the same manner and all receive a dictionary for startCoordinates and endCoordinates.

[shatran]

It does seem weird. but maybe the 'endCoordinates' value can be null? IDK..
I did use the keyboard events module, but i've deleted it from the js section and in the build phase of the xcode project so i'm not sure how can i still be using it..
anyway it's up to you if you want to add it to the docs or not, i can only share what happened to me, not if it will definitely happen to anyone else.

[johanneslumpe]

@shatran Would be great if you were able to confirm this issue with a clean project and report back here if you have the time :)