Slavik Manukyan ec6e274172 relativeKeyboardHeight works wrong in some cases ...

Summary:
relativeKeyboardHeight calculation is wrong when frame.y < keyboardFrame.y

Let's look at an example:

``` jsx
import React, { Component } from 'react';
import {
  KeyboardAvoidingView,
  TextInput,
  AppRegistry,
  Text,
  View
} from 'react-native';

export default class Test extends Component {
  constructor(props, context) {
    super(props, context);
  }

  render() {
    return (
      <View style={{flex: 1, marginTop: 20}}>
          <Text style={{ flex: 1, alignItems: 'center'}}>
            Hi! This is test.
          </Text>

          <KeyboardAvoidingView behavior={'position'} keyboardVerticalOffset={-20} >
            <TextInput
              style={{height: 40, borderColor: 'gray', borderWidth: 1}}
            />
          </KeyboardAvoidingView>
      </View>
    );
  }
}

AppRegistry.registerComponent('Test', () => Test);
```

![rn-relativekb](https://cloud.githubusercontent.com/assets/13254349/17298119/b2192830-5819-11e6-968c-d9e95b6e4aba.gif)

How _relativeKeyboardHeight_ calculates positio
Closes https://github.com/facebook/react-native/pull/9139

Differential Revision: D4168431

Pulled By: hramos

fbshipit-source-id: 9181276355490452071b51b51ed7dc9ab80b2444

2016-11-14 11:58:58 -08:00

..

Keyboard.js

Fix missing methods in Keyboard module

2016-11-01 08:58:39 -07:00

KeyboardAvoidingView.js

relativeKeyboardHeight works wrong in some cases

2016-11-14 11:58:58 -08:00