(React Native - 使用 AWS Amplify) - 不变违规：本机模块不能为空

Question

问题描述：

我正在使用此 AWS Amplify doc 在我的 React-Native 应用程序中实现推送通知，并且使用 iOS 部分进行测试失败并出现错误“Invariant Violation: Native module cannot为空”，但是如果我测试（即获取设备令牌并发送推送通知）Android部分它工作。我在 iOS 上看到的错误截图如下：

到目前为止我尝试了什么：

正在将 react-native 版本从 0.59.10 升级到 0.61.5
根据这个 github post，我还尝试安装以下内容：

@react-native-community/push-notification-ios

npm 安装 aws-amplify@unstable

这个模块 (aws-amplify@unstable) 引入了一个错误说 TypeError: undefined is not an object (evaluating '_core.Amplify.register') 所以我决定去掉它。

使用 "@aws-amplify/pushnotification" 的最新软件包："^3.0.13" 适用于 Android 但在 iOS 我' m 回到原来的错误：“不变违规：本机模块不能为空”

目前我的 package.json 如下：

"dependencies": {
"@aws-amplify/pushnotification": "^1.1.4",
"@aws-amplify/analytics": "^1.3.3",
"@react-native-community/netinfo": "^5.7.0",
"@react-native-community/push-notification-ios": "^1.2.0",
"amazon-cognito-identity-js": "^4.2.1",
"aws-amplify": "^1.2.4",
"aws-amplify-react-native": "^4.2.0",
"axios": "^0.19.2",
"cache": "^2.3.1",
"react": "16.9.0",
"react-native": "^0.62.2"
}

先睡一觉，明天早上继续调试..

Answer 1

经过几个小时的调试，似乎有些版本不能很好地相互配合，我已经设法修复错误 "Invariant Violation: Native module cannot be null" 并获得 Android & iOS 推送通知使用以下版本 aws amplify lib 和 @react-native-community/push-notification-ios:

"dependencies": {
"@aws-amplify/pushnotification": "^3.0.13",
"@aws-amplify/analytics": "^1.3.3",
"@react-native-community/netinfo": "^5.7.0",
"@react-native-community/push-notification-ios": "^1.0.2",
"amazon-cognito-identity-js": "^4.2.1",
"aws-amplify": "^3.0.13",
"aws-amplify-react-native": "^4.2.0",
"axios": "^0.19.2",
"cache": "^2.3.1",
"react": "16.9.0",
"react-native": "^0.62.2"
},

或

"dependencies": {
"@react-native-community/push-notification-ios": "^1.2.0",
"@react-native-community/netinfo": "^5.7.0",
"@aws-amplify/pushnotification": "^3.1.2",
"@aws-amplify/analytics": "^1.3.3",
"@aws-amplify/core": "^3.3.2",
"amazon-cognito-identity-js": "^4.2.1",
"aws-amplify-react-native": "^4.2.0",
"aws-amplify": "^3.0.16",
"axios": "^0.19.2",
"cache": "^2.3.1",
"react": "16.9.0",
"react-native": "^0.62.2"
},

AWS Amplify（iOS 的推送通知模块）似乎已从 react-native 核心切换到@react-native-community/push-notification-ios。因此，由于这次迁移，这里有一些变化，如果你运行遇到这个问题，可能需要交叉检查：

第 1 步：更新 Podfile

从您的 Podfile（您可以在 ios 文件夹中找到）中删除 'React-RCTPushNotification'。:

pod 'React-RCTPushNotification', :path => '../node_modules/react-native/Libraries/PushNotificationIOS'

步骤 2：Link PushNotificationIOS 库

步骤 2.1：自动 Linking

将以下 RNCPushNotificationIOS 添加到您的 podfile（您可以在 ios 文件夹中找到）。

pod 'RNCPushNotificationIOS', :path => '../node_modules/@react-native-community/push-notification-ios/RNCPushNotificationIOS.podspec'

然后通过运行ning 以下命令安装 pod 依赖项：cd ios && pod install

步骤 2.2：手动 Linking（如果自动链接对您不起作用，请考虑此选项）

将此 PushNotificationIOS.xcodeproj 文件 (node_modules/@react-native-community/push-notification-ios/ios) 拖到 [=119 上的项目中=]（通常在 Xcode 的图书馆组下）：

通过选择 Project Navigator -> Target -> Build Phrases -> Linked Binary with Libraries，将 libRNCPushNotificationIOS.a 添加到链接的二进制文件中（确保libRNCPushNotificationIOS.a 有）

步骤 3：扩充 AppDelegate

步骤 3.1：更新 AppDelegate.h

在文件顶部添加以下内容：

#import <UserNotifications/UNUserNotificationCenter.h>

然后，将“UNUserNotificationCenterDelegate”添加到协议中，如下所示：

@interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate, UNUserNotificationCenterDelegate>

步骤 3.2：更新 AppDelegate.m

在文件顶部添加以下内容：

#import <UserNotifications/UserNotifications.h>
#import <RNCPushNotificationIOS.h>

用 RNCPushNotificationIOS

替换 RCTPushNotificationManager 的 AppDelegate.m 中的所有条目

然后，根据 react-native-community.push-notification-ios

在 @end 之前添加以下代码片段

// Required to register for notifications
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings
{
  [RNCPushNotificationIOS didRegisterUserNotificationSettings:notificationSettings];
}
// Required for the register event.
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
  [RNCPushNotificationIOS didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
}
// Required for the notification event. You must call the completion handler after handling the remote notification.
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
  [RNCPushNotificationIOS didReceiveRemoteNotification:userInfo fetchCompletionHandler:completionHandler];
}
// Required for the registrationError event.
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
  [RNCPushNotificationIOS didFailToRegisterForRemoteNotificationsWithError:error];
}
// Required for the localNotification event.
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
  [RNCPushNotificationIOS didReceiveLocalNotification:notification];
}

其他有用的提示！

whenever you update your package.json, do the following :

rm -rf -rf node_modules
yarn cache clean --force
yarn install
cd ios && pod install
React-native start -- --reset-cache

希望这对某人有所帮助！

(React Native - 使用 AWS Amplify) - 不变违规：本机模块不能为空

(React Native - Using AWS Amplify) - Invariant Violation: Native module cannot be null

react-native

aws-pinpoint

aws-amplify

其他有用的提示！