react native输入框 输入金额等数据后如何格式化显示

import React ,{ Component } from 'react';import {View} from 'react-native';import {  Cells,  Cell,  CellHeader,  CellBody,  CellFooter,  CellText,  Input,  Label,} from 'rn-weui/src';export class InputBox extends Component{    constructor(props) {      super(props);      this.state = {            money:'',            endEdit:true        };        this.fmoney = this.fmoney.bind(this);    }        /**     * 格式化money     * s为要格式化的money     * n为小数位数     */    fmoney(s, n){            if(s==='')            return;       n = n > 0 && n <= 20 ? n : 2;          s = parseFloat((s + "").replace(/[^\d\.-]/g, "")).toFixed(n) + "";          var l = s.split(".")[0].split("").reverse(),          r = s.split(".")[1];          var t = "";          for(let i = 0; i < l.length; i ++ ) {             t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");          }          return t.split("").reverse().join("") + "." + r;       }     render(){        return (            <Cells>             <Cell>          <CellHeader><Label>单价</Label></CellHeader>          <CellBody>            <View>              <Input style={{height:40}}                 underlineColorAndroid="transparent"                placeholder="请输入金额"                keyboardType='numeric'                value={this.state.endEdit?this.fmoney(this.state.money,2):this.state.money+''}                            onChangeText={(text)=>{                                this.setState({money:text});                                }}                                  onFocus={()=>{                                // this.setState({endEdit:false});                                this.setState({endEdit:false,money:''});                            }}                            onEndEditing={(event) => {                                this.setState({endEdit:true});                            }}                          ></Input>                        </View>          </CellBody>          <CellFooter>元</CellFooter>        </Cell>        <Cell>        <CellHeader><Label>单价</Label></CellHeader>          <CellBody>            <View>              <Input style={{height:40}}                 underlineColorAndroid="transparent"                placeholder="请输入物品单价"                keyboardType='numeric'                          ></Input>                        </View>          </CellBody>          <CellFooter>元</CellFooter>        </Cell>        </Cells>        );    }}

首先，state声明一个输入框是否正在输入的状态endEdit和一个用来表示输入框中显示的值money; 然后，在onblue获得焦点的实践中，将是否正在输入的状态改为false，输入框中的显示money;输入完成，将endEdit改为出，输入框中的值改为格式化后的值。