react-native 键盘遮盖底部输入框问题修复

当最底部的输入框在安卓端会被遮住，而不会跟随键盘往上移动，

input.tsx
首先在input获取焦点的是，获取它在屏幕的位置

import { Platform, StyleSheet, Text, TouchableOpacity, TouchableWithoutFeedback, View, TextInput, findNodeHandle, UIManager, DeviceEventEmitter } from 'react-native'

  onInputLayout = (target: number | React.ComponentClass<any, any> | React.Component<any, any, any> | null): any => {
    if (!target) {
      return false
    }
    const handle: any = findNodeHandle(target)
    handle &&
      UIManager.measure(handle, (x, y, width, height, pageX, pageY) => {
        // console.log('相对父视图位置x:', x)
        // console.log('相对父视图位置y:', y)
        // console.log('组件宽度width:', width)
        // console.log('组件高度height:', height)
        // console.log('距离屏幕的绝对位置x:', pageX)
        // console.log('距离屏幕的绝对位置y:', pageY)
        DeviceEventEmitter.emit('onInputLayout', {
          x,
          y,
          width,
          height,
          pageX,
          pageY
        })
      })
  }
  onInputFocus = e => {
    console.log('args', e.nativeEvent.target)
    this.onInputLayout(e.nativeEvent.target)
    this.props.onFocus && this.props.onFocus(e)
  }

CommentKeyboardAvoidingView.tsx

import React from 'react'
import { KeyboardAvoidingView, Platform, Keyboard, View, Dimensions, DeviceEventEmitter } from 'react-native'
import debounce from 'lodash.debounce'
import { BottomTabBarHeightContext } from '@react-navigation/bottom-tabs'
import { ClassuseEngineOptionsContext } from '../../hooks/useEngineOptionsContext'
import { EdgeInsets, withSafeAreaInsets } from 'react-native-safe-area-context'

interface StateProps {
  keyboardHeight: number
  isKeyBoardShow: boolean
}
interface PropsType {
  children?: any
}

interface InputEventPropsType {
  x: number
  y: number
  width: number
  height: number
  pageX: number
  pageY: number
}

class CommentKeyboardAvoidingView extends ClassuseEngineOptionsContext {
  keyboardDidShowListener: any = null
  keyboardDidHideListener: any = null
  inputListener: any = null
  inputEvent: InputEventPropsType = {
    x: 0,
    y: 0,
    width: 0,
    height: 0,
    pageX: 0,
    pageY: 0
  }
  insets: EdgeInsets = {
    top: 0,
    right: 0,
    bottom: 0,
    left: 0
  }
  constructor(props: PropsType) {
    super(props)
    this.state = {
      keyboardHeight: 0,
      isKeyBoardShow: false,
      enabled: true
    }
  }
  setKeyboardHeight = (num: number) => {
    this.setState({ keyboardHeight: num })
  }

  componentDidMount() {
    this.addKeyEvent()
    this.addInputEvent()
  }

  componentWillUnmount() {
    this.removeKeyEvent()
    this.removeInputEvent()
  }

  setIsKeyBoardShow(isKeyBoardShow: boolean) {
    this.setState({
      isKeyBoardShow: isKeyBoardShow
    })
  }

  addInputEvent = () => {
    try {
      this.inputListener = DeviceEventEmitter.addListener('onInputLayout', (inputEvent: InputEventPropsType) => {
        console.log('onInputLayout-inputEvent', inputEvent)
        this.inputEvent = inputEvent
      })
    } catch {}
  }

  removeInputEvent = () => {
    try {
      this.inputListener && this.inputListener.remove()
    } catch {}
  }

  addKeyEvent = () => {
    try {
      this.keyboardDidShowListener = Keyboard.addListener('keyboardDidShow', this.keyboardDidShow)
      this.keyboardDidHideListener = Keyboard.addListener('keyboardDidHide', this.keyboardDidHide)
    } catch {}
  }
  removeKeyEvent = () => {
    try {
      this.keyboardDidShowListener && this.keyboardDidShowListener.remove()
      this.keyboardDidHideListener && this.keyboardDidHideListener.remove()
    } catch (err) {
      console.log('keyboardDidShowListener')
    }
  }

  getShengyuHeight = (): number => {
    const screenHeight = Dimensions.get('window').height
    const pageY = this.inputEvent.pageY
    const shengyuHeight = screenHeight - pageY

    return shengyuHeight
  }

  // 键盘弹出
  keyboardDidShow = debounce(
    (e: any) => {
      let height = Math.ceil(e?.endCoordinates?.height || 0)
      console.log(`e---`, e)
      console.log('onInputLayout-inputEvent2', this.inputEvent)
      const shengyuHeight = this.getShengyuHeight()
      let enabled: Boolean = true
      if (shengyuHeight < height + this.insets.bottom) {
        height = height + this.insets.bottom
        enabled = true
      } else {
        height = 0
        enabled = false
      }
      if (Platform.OS == 'ios') {
        enabled = false
      }
      this.setKeyboardHeight(height)
      this.setIsKeyBoardShow(true)
      this.setState({
        enabled: enabled
      })
    },
    30,
    null,
    {
      leading: false,
      trailing: true
    }
  )

  // 键盘隐藏
  keyboardDidHide = debounce(
    (e: any) => {
      this.setKeyboardHeight(0)
      this.setIsKeyBoardShow(false)
      this.setState({
        enabled: false
      })
    },
    300,
    null,
    {
      leading: true,
      trailing: false
    }
  )

  render(): React.ReactNode {
    const { keyboardHeight, engineOptionContext, enabled } = this.state
    console.log(`keyboardHeight`, keyboardHeight)
    const { insets } = this.props

    return (
      <KeyboardAvoidingView behavior={Platform.OS == 'ios' ? 'padding' : 'padding'} enabled={enabled}>
        {this.props.children}
        {enabled && <View style={{ paddingBottom: 30 }}></View>}
      </KeyboardAvoidingView>
    )
  }
}

export default withSafeAreaInsets(CommentKeyboardAvoidingView)

直接使用

            <CommentKeyboardAvoidingView>
                  {children}
            </CommentKeyboardAvoidingView>