Undefined不是对象(评估'_PushTokenManager.default.getDevicePushTokenAsync [REACT NATIVE EXPO]

lsmepo6l 于 2022-12-14 发布在 React

关注(0)|答案(5)|浏览(172)

无法在Expo-notifications API上使用getExpoPushTokenAsync（）函数获取令牌。以下函数与Expo文档完全相同：

import Constants from "expo-constants";
import * as Notifications from "expo-notifications";
import * as Permissions from "expo-permissions";

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;
}

博览会：~37.0.3应用程序：

"expo": {
        "android": {
          "useNextNotificationsApi": true
        }
      }

似乎在调用该函数时，得到了下一个警告：

[Unhandled promise rejection: TypeError: undefined is not an object (evaluating '_PushTokenManager.default.getDevicePushTokenAsync')]

react-native

来源：https://stackoverflow.com/questions/62748328/undefined-is-not-an-object-evaluating-pushtokenmanager-default-getdevicepusht

5条答案

按热度按时间

wi3ka0sx1#

请确定您是从“expo”汇入{Notifications}，而不是从“expo-notifications”汇入{Notifications}。之前也有相同的问题，但尝试从“expo”汇入，结果成功了。Check out this image

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kiz8lqtg2#

请确保您处于托管工作流中，如果您处于裸工作流中，则应指定{ experienceId}
文档中的代码示例：

import Constants from 'expo-constants';
import * as Notifications from 'expo-notifications';

export async function registerForPushNotificationsAsync(userId: string) {
  let experienceId = undefined;
  if (!Constants.manifest) {
    // Absence of the manifest means we're in bare workflow
    experienceId = '@username/example';
  }
  const expoPushToken = await Notifications.getExpoPushTokenAsync({
    experienceId,
  });
  await fetch('https://example.com/', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      userId,
      expoPushToken,
    }),
  });
}

experienceId（字符串）--令牌应归属的体验ID。默认为Constants.manifest.idexpo-constants公开的www.example.com。在bare工作流中，您必须提供一个采用@username/projectSlug形式的值，其中username是与项目关联的Expo帐户，projectSlug是app.json中的slug
更多信息：https://docs.expo.io/versions/latest/sdk/notifications/#dailytriggerinput

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ftf50wuq3#

我得到这个错误，因为我没有登录到博览会（使用博览会客户端）.

赞(0）回复(0）举报 2022-12-14

5lhxktic4#

上面的答案对我都没有帮助。我不得不将我的import语句从

import { Notifications } from 'expo';

至

import * as Notifications from 'expo-notifications';

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mpbci0fu5#

您应该使用

import * as Notifications from 'expo-notifications';

这应该可以

赞(0）回复(0）举报 2022-12-14

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Undefined不是对象(评估'_PushTokenManager.default.getDevicePushTokenAsync [REACT NATIVE EXPO]

5条答案

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