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September 25, 2019 14:14
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Handling keyboard position - React Native
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| import React, { useEffect } from 'react' | |
| import { runTiming } from 'utils/animations' | |
| import Animated from 'react-native-reanimated' | |
| import { | |
| Dimensions, | |
| Keyboard, | |
| UIManager, | |
| TextInput, | |
| Platform | |
| } from 'react-native' | |
| const KeyboardAware: React.FC<{}> = (props) => { | |
| const isIOS = Platform.OS === 'ios' | |
| const show = isIOS ? 'keyboardWillShow' : 'keyboardDidShow' | |
| const hide = isIOS ? 'keyboardWillHide' : 'keyboardDidHide' | |
| const shiftValue = new Animated.Value<number>(0) | |
| const animationClock = new Animated.Clock() | |
| const paddingFromKeyboard = 10 | |
| const translateY = runTiming({ | |
| clock: animationClock, | |
| value: new Animated.Value(0), | |
| dest: shiftValue, | |
| duration: 200 | |
| }) | |
| const handleShow = (event: any) => { | |
| const keyboardSize = event.endCoordinates.height | |
| const deviceSize = Dimensions.get('window').height | |
| const focusedField = TextInput.State.currentlyFocusedField() | |
| focusedField && UIManager.measure(focusedField, ( | |
| originX, | |
| originY, | |
| width, | |
| height, | |
| pageX, | |
| pageY | |
| ) => { | |
| const fieldHeight = height + pageY | |
| const visibleScreen = deviceSize - keyboardSize - (isIOS ? 0 : 20) | |
| const gap = visibleScreen - fieldHeight - paddingFromKeyboard | |
| gap < 0 && shiftValue.setValue(gap) | |
| }) | |
| } | |
| useEffect(() => { | |
| Keyboard.addListener(show, handleShow) | |
| Keyboard.addListener(hide, () => shiftValue.setValue(0)) | |
| return () => { | |
| Keyboard.removeListener(show) | |
| Keyboard.removeListener(hide) | |
| } | |
| }, []) | |
| return ( | |
| <Animated.View style={{ flex: 1, transform: [{ translateY }] }}> | |
| {props.children} | |
| </Animated.View> | |
| ) | |
| } | |
| export default KeyboardAware |
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