[英]React Native fetch error: “[Unhandled promise rejection: TypeError: Network request failed]”
[英]react-native error:[Unhandled promise rejection: Error: Error encountered while fetching Expo token: TypeError: Network request failed.]
Error logs: [Unhandled promise rejection: Error: Error encountered while fetching Expo token: TypeError: Network request failed.]
* [native code]:null in construct
- node_modules\@babel\runtime\helpers\construct.js:19:9 in _construct
- node_modules\@babel\runtime\helpers\wrapNativeSuper.js:26:22 in Wrapper
* [native code]:null in construct
* http://192.168.1.4:19015/node_modules%5Cexpo%5CAppEntry.bundle?platform=android&dev=true&minify=false&hot=false:107658:321 in _createSuperInternal
- node_modules\@unimodules\react-native-adapter\build\errors\CodedError.js:8:8 in constructor
- node_modules\expo-notifications\build\getExpoPushTokenAsync.js:35:22 in fetch._catch$argument_0
- node_modules\promise\setimmediate\core.js:37:13 in tryCallOne
- node_modules\promise\setimmediate\core.js:123:24 in setImmediate$argument_0
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:135:14 in _callTimer
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:183:16 in _callImmediatesPass
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:446:30 in callImmediates
* [native code]:null in callImmediates
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:396:6 in __callImmediates
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:144:6 in __guard$argument_0
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:373:10 in __guard
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:143:4 in flushedQueue
* [native code]:null in flushedQueue
* [native code]:null in callFunctionReturnFlushedQueue
我的代码:
import Constants from "expo-constants";
import * as Notifications from "expo-notifications";
import * as Permissions from "expo-permissions";
import React, { useState, useEffect, useRef } from "react";
import { MainLayout } from "./src/MainLayout";
//TODO import fonts
/*var uuid = require('react-native-uuid');
console.log(uuid.v4())*/
export default function App() {
registerForPushNotificationsAsync().then((token) => console.log(token));
return <MainLayout />;
}
async function registerForPushNotificationsAsync() {
let token;
if (Constants.isDevice) {
const { status: existingStatus } = await Permissions.getAsync(
Permissions.NOTIFICATIONS
);
let finalStatus = existingStatus;
if (existingStatus !== "granted") {
const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS);
finalStatus = status;
}
if (finalStatus !== "granted") {
alert("Failed to get push token for push notification!");
return;
}
token = (await Notifications.getExpoPushTokenAsync()).data;
console.log(token);
} else {
alert("Must use physical device for Push Notifications");
}
if (Platform.OS === "android") {
Notifications.setNotificationChannelAsync("default", {
name: "default",
importance: Notifications.AndroidImportance.MAX,
vibrationPattern: [0, 250, 250, 250],
lightColor: "#FF231F7C",
});
}
return token;
}
我想实现一个通知推送机制,从这个网站https://docs.expo.io/push-notifications/overview/ 获取代码
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