Arrow功能与async和await in react native

本文介绍了Arrow功能与async和await in react native的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试在 react-native 中的 AsyncStorage 中保存数据。我想保存它是异步的，所以使用 async 和等待关键字。

I am trying to save data in AsyncStorage in react-native. I want to save it asynchronous so using async and await keyword.

async onPositiveClickListener = () => { // user has completed product tour_end try { await AsyncStorage.setItem("@ProductTour:key", "true"); const { navigate } = this.props.navigation; navigate("DashboardScreen"); } catch (error) { console.log(error); } };

我在保存程序时遇到错误

I am getting an error while saving program

SyntaxError: Unexpected token, expected ( (40:32) 38 | }; 39 | > 40 | async onPositiveClickListener = () => { | ^ 41 | // save user has completed product tour_end 42 | try { 43 | await AsyncStorage.setItem("@ProductTour:key", "true"); Hide Stack Trace SyntaxError: Unexpected token, expected ( (40:32) 38 | }; 39 | > 40 | async onPositiveClickListener = () => { | ^ 41 | // save user has completed product tour_end 42 | try {

推荐答案

异步命名箭头函数应声明为

Async named arrow function should be declared like

const onPositiveClickListener = async () => { // user has completed product tour_end try { await AsyncStorage.setItem("@ProductTour:key", "true"); const { navigate } = this.props.navigation; navigate("DashboardScreen"); } catch (error) { console.log(error); } };