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Keyboard spacing solution for react-native based on the stackoverflow answer http://stackoverflow.com/a/33585501/1783214
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// Based on dbasedow/KeyboardHandler.js | |
/** | |
* Based on http://stackoverflow.com/a/33585501/1783214 | |
* | |
* Handle resizing enclosed View and scrolling to input | |
* Usage: | |
* <KeyboardHandler ref='kh' offset={50} > | |
* <View> | |
* ... | |
* <TextInput ref='username' | |
* onFocus={()=>this.refs.kh.inputFocused(this,'username')}/> | |
* ... | |
* </View> | |
* </KeyboardHandler> | |
* | |
* offset is optional and defaults to 34 | |
* Any other specified props will be passed on to ScrollView | |
*/ | |
'use strict'; | |
import React, { Component } from 'react'; | |
import ReactNative, { | |
ScrollView, | |
View, | |
Keyboard, | |
Platform | |
// DeviceEventEmitter, | |
} from 'react-native'; | |
class KeyboardHandler extends Component { | |
constructor(props) { | |
super(props); | |
this.state = {keyboardSpace: 0}; | |
this.focused = null; | |
this._didShowListener = null; | |
this._willHideListener = null; | |
this._listeners = null; | |
} | |
onKeyboarDidShow(frames) { | |
if (!frames.endCoordinates || !this.focused) { | |
return; | |
} | |
this.setState({keyboardSpace: frames.endCoordinates.height}); | |
let scrollResponder = this.refs.scrollView.getScrollResponder(); | |
scrollResponder.scrollResponderScrollNativeHandleToKeyboard( | |
this.focused, | |
this.props.offset, //additionalOffset | |
true | |
); | |
} | |
onKeyboardWillHide() { | |
this.setState({keyboardSpace: 0}); | |
} | |
componentWillMount() { | |
let _this=this; | |
const updateListener = Platform.OS === 'android' ? 'keyboardDidShow' : 'keyboardWillShow'; | |
const resetListener = Platform.OS === 'android' ? 'keyboardDidHide' : 'keyboardWillHide'; | |
this._listeners = [ | |
Keyboard.addListener(updateListener, this.onKeyboarDidShow.bind(this)), | |
Keyboard.addListener(resetListener, this.onKeyboardWillHide.bind(this)) | |
]; | |
//i've added the ability to overwrite the keyboardShouldPersistTaps props | |
//when you use this component in a page that can be reached by navigation | |
//you have to overwrite this props to false | |
//this update will fix the onBlur event bug of this component: | |
/* Usage: | |
* <KeyboardHandler ref='kh' offset={50} keyboardShouldPersistTaps={false}> | |
* <View> | |
* ... | |
* <TextInput ref='username' | |
* onFocus={()=>this.refs.kh.inputFocused(this,'username')}/> | |
* ... | |
* </View> | |
* </KeyboardHandler> | |
*/ | |
this.scrollviewProps = { | |
automaticallyAdjustContentInsets: true, | |
keyboardShouldPersistTaps: _this.props.keyboardShouldPersistTaps || true, | |
scrollEventThrottle: 200, | |
}; | |
// pass on any props we don't own to ScrollView | |
Object.keys(this.props).filter((n) => { | |
return n != 'children' | |
}) | |
.forEach((e) => { | |
this.scrollviewProps[e] = this.props[e] | |
}); | |
} | |
componentWillUnmount() { | |
this._listeners.forEach(listener => listener.remove()); | |
} | |
render() { | |
return ( | |
<ScrollView ref='scrollView' {...this.scrollviewProps}> | |
{this.props.children} | |
<View style={{ height: this.state.keyboardSpace }}/> | |
</ScrollView> | |
); | |
} | |
inputFocused(_this, refName) { | |
this.focused = ReactNative.findNodeHandle(_this.refs[refName]); | |
} | |
scrollToFocusedInput(event, reactNode) { | |
this.focused = reactNode; | |
} | |
static propTypes = { | |
offset: React.PropTypes.number | |
}; | |
static defaultProps = { | |
offset: 0 | |
}; | |
} | |
export default KeyboardHandler; |
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_this.props.keyboardShouldPersistTaps || true
will always evaluate to true.