🐞Type 'WorkmanagerPlugin' has no member 'registerBGProcessingTask' and Type 'WorkmanagerPlugin' has no member 'registerPeriodicTask'

[Brechard]

• I have read the README
• I have done the setup for Android
• I have done the setup for iOS
• I have ran the sample app and it does not work there

Version

Technology	Version
Workmanager version	0.5.2
Xcode version	15.3
Swift version	5.10
iOS deployment target	12

Describe the error

I was following the setup for iOs and when reaching the "You MUST amend your AppDelegate.swift and Info.plist file to register your task ID." I receive those errors in Xcode.

I have cloned this repo and the same errors show on the example (on the flutter side there are 4 errors like: error: The method 'registerProcessingTask' isn't defined for the type 'Workmanager'. (undefined_method at [workmanager_example] lib/main.dart:266)

Output of flutter doctor -v

[✓] Flutter (Channel stable, 3.19.6, on macOS 14.4.1 23E224 darwin-arm64, locale en-US)
• Flutter version 3.19.6 on channel stable at ~/software/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 54e66469a9 (7 days ago), 2024-04-17 13:08:03 -0700
• Engine revision c4cd48e186
• Dart version 3.3.4
• DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at ~/Library/Android/sdk
• Platform android-34, build-tools 34.0.0
• Java binary at: ~/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11572160)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 15E204a
• CocoaPods version 1.15.2

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.2)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)

[✓] Android Studio (version 2023.3)
• Android Studio at ~/Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11572160)

[✓] IntelliJ IDEA Ultimate Edition (version 2024.1.1)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.88.0)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.84.0

[✓] Connected device (4 available)
• Pixel 8 (mobile) • 39011FDJH007KM • android-arm64 • Android 14 (API 34)
• iPhone 15 Pro (mobile) • 195714BD-9F6E-47A9-9886-313A3A97FC68 • ios • com.apple.CoreSimulator.SimRuntime.iOS-17-4 (simulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 14.4.1 23E224 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 124.0.6367.62

[✓] Network resources
• All expected network resources are available.

[Cmk427]

You may try to change the branch of the package in pubspec.yaml file:

  workmanager:
    git:
      url: https://github.com/absar/flutter_workmanager.git
      ref: ios-bg-tasks-enh-final

It may help you to solve your issue at this moment.

[joonne]

The above solution seems to work, I'm now able to build the app and triggering the background task from the debugger works. Could we get a comment whether this is the "correct" solution for making this plugin work on iOS at the moment?

[nk4n01]

I got the same error !!

[razumeiko]

Don't you think that it's weird? The official git link is https://github.com/fluttercommunity/flutter_workmanager
but you are pulling code from https://github.com/absar/flutter_workmanager.git who knows what he could code there.

[joonne]

I could have elaborated a bit, those changes from https://github.com/absar/flutter_workmanager.git are actually in main already and waiting to be released: b783000 👍

(or that is how I understood the situation)

[dario-digregorio]

I spend too much time figuring out why the described setup is not working with my project until I realized that the link to the iOS Setup brings you to the GitHub Repo, has a different version than the one that is published on pub.dev 🥲
So for others that are struggling use the right version in your pubspec.yml and read the Readme's from that commit b783000.

Pubspec

  workmanager:
    git:
      url: https://github.com/fluttercommunity/flutter_workmanager.git
      ref: b783000

[Kurokirisu]

Pubspec

  workmanager:
    git:
      url: https://github.com/fluttercommunity/flutter_workmanager.git
      ref: b783000

I am now using this version instead of the 0.5.2 version and at first it worked fine, but now I get an error on Android:

• What went wrong:
  Execution failed for task ':app:checkDebugDuplicateClasses'.

A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable
Duplicate class androidx.work.OneTimeWorkRequestKt found in modules work-runtime-2.8.1-runtime (androidx.work:work-runtime:2.8.1) and work-runtime-ktx-2.7.0-runtime (androidx.work:work-runtime-ktx:2.7.0)
Duplicate class androidx.work.PeriodicWorkRequestKt found in modules work-runtime-2.8.1-runtime (androidx.work:work-runtime:2.8.1) and work-runtime-ktx-2.7.0-runtime (androidx.work:work-runtime-ktx:2.7.0)

I really need the periodic tasks to work on iOS, so I hope someone can help me with this since they don't work in the 0.5.2 version.

[ghufrankhan]

Pubspec

  workmanager:
    git:
      url: https://github.com/fluttercommunity/flutter_workmanager.git
      ref: b783000

I am now using this version instead of the 0.5.2 version and at first it worked fine, but now I get an error on Android:

• What went wrong:
  Execution failed for task ':app:checkDebugDuplicateClasses'.

A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable
Duplicate class androidx.work.OneTimeWorkRequestKt found in modules work-runtime-2.8.1-runtime (androidx.work:work-runtime:2.8.1) and work-runtime-ktx-2.7.0-runtime (androidx.work:work-runtime-ktx:2.7.0)
Duplicate class androidx.work.PeriodicWorkRequestKt found in modules work-runtime-2.8.1-runtime (androidx.work:work-runtime:2.8.1) and work-runtime-ktx-2.7.0-runtime (androidx.work:work-runtime-ktx:2.7.0)

I really need the periodic tasks to work on iOS, so I hope someone can help me with this since they don't work in the 0.5.2 version.

Hi, try adding this line inside the dependencies array found in /android/app/build.gradle:

implementation("androidx.work:work-runtime-ktx:2.8.1")