react-natie 删除提示怎么实现

import React from "react";import {    Alert,Button,View,Text,TouchableOpacity,StyleSheet} from "react-native";export default class App extends React.Component{   showAlert=()=>{       Alert.alert("点击了弹出框")    };    showConfirm=()=>{        Alert.alert("警告","确认删除",[            {text:"确认",onPress:() =>  Alert.alert("点击了确认") },            {text:"取消",style:"cancel"}        ],{cancelable:false});    };    render(){        return (          <View style={styles.container}>              <View style={styles.buttonView}><Button  onPress={this.showAlert} title={"点击显示alert"} /></View>              <View style={styles.buttonView}><Button  onPress={this.showConfirm} title={"点击显示确认框"} /></View>           </View>        )    }}const styles=StyleSheet.create({    container:{        marginTop:20,        marginHorizontal:10    },    buttonView:{        margin: 10,        height: 40    }});