Question

TypeError：未定义不是一个对象（评估'_pushNotifications.pushNotifications.configure'）React Native

2020-05-04

2546

ios react-native push-notification

我是 React Native 新手，正在尝试使用 push-notification-ios 和 react-native-push-notification 在 iOS 上创建推送通知。我正在关注一些不同的教程，因为我仍在学习它的工作原理。

当我运行我的应用程序时，我收到以下错误。

这是我的代码

const configure = async () => {
    console.log('push notification configured');
    PushNotificationIOS.addEventListener('registrationError', (e) => {

    PushNotifcation.configure({
        
        onRegister: function(token) {
            //process token
            alert('Token!' + JSON.stringify(token));
            console.log('[CATCHED] onRegister:', token);
            db.setToken(token).catch(
               console.log('[ERROR] device push token has not been saved on the database'), 
            );
        },
        onNotification: async function(notification) {
            console.log('[CATCHED] onNotification:' + JSON.stringify(notification));
            let notifType = '';
            if (Platform.OS === 'ios') {
                notifType = getNotificationType(
                    JSON.parse(notification.data.data).type,
                );
            } else {
                notifType = getNotificationType(
                    notification.type,
                );
            }
            //process the notification
            //required on iOS only
            if (Platform.OS === 'ios') {
            notification.finish(PushNotificationIOS.FetchResult.NoData);
            }
            },
            senderID: '-----',

        permissions: {
            alert: true,
            badge: true,
            sound: true
        },

        popInitialNotification: true,
        requestPermissions: true,
    });
    });
}

export {
    configure,
};

Answer 1

第 5 行：您输入的是 PushNotifcation ，而不是 PushNotification 。

修复后的代码在这里：

const configure = async () => {
    console.log('push notification configured');
    PushNotificationIOS.addEventListener('registrationError', (e) => {

    PushNotification.configure({

        onRegister: function(token) {
            //process token
            alert('Token!' + JSON.stringify(token));
            console.log('[CATCHED] onRegister:', token);
            db.setToken(token).catch(
               console.log('[ERROR] device push token has not been saved on the database'), 
            );
        },
        onNotification: async function(notification) {
            console.log('[CATCHED] onNotification:' + JSON.stringify(notification));
            let notifType = '';
            if (Platform.OS === 'ios') {
                notifType = getNotificationType(
                    JSON.parse(notification.data.data).type,
                );
            } else {
                notifType = getNotificationType(
                    notification.type,
                );
            }
            //process the notification
            //required on iOS only
            if (Platform.OS === 'ios') {
                notification.finish(PushNotificationIOS.FetchResult.NoData);
            }
            },
            senderID: '-----',

        permissions: {
            alert: true,
            badge: true,
            sound: true
        },

        popInitialNotification: true,
        requestPermissions: true,
    });
    });
}

export {
    configure,
};

Answer 2

您已重新构建应用程序，请尝试：

yarn android

或者

cd android && ./gradlew clean && cd .. && react-native run-android

祝你好运 :)

Answer 3

你导入的路径肯定是错的

试试这个：

import PushNotification from 'react-native-push-notification';
import PushNotificationIOS from '@react-native-community/push-notificatio-ios';