🐞[iOS] MissingPluginException in example app #189

gebsl · 2020-07-15T22:04:53Z

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	0.2.3
Xcode version	11.5
Swift version	5.0
iOS deployment target	13.5.1 (iPhone SE 1st Generation)

Describe the error

When running the example app on a real iOS device through XCode (by pressing the "Run" icon), the app throws an exception when pressing the "Start the Flutter background service" button. Subsequently, background fetch won't work and the dispatch method is never called.

The exception in XCode's console is:

2020-07-15 23:46:23.059914+0200 Runner[9411:4096136] [VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method initialize on channel be.tramckrijte.workmanager/foreground_channel_work_manager)
#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7)
<asynchronous suspension>
#1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
#2      Workmanager.initialize (package:workmanager/src/workmanager.dart:100:30)
#3      _MyAppState.build.<anonymous closure> (package:workmanager_example/main.dart:87:33)
#4      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:779:19)
#5      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:862:36)
#6      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
#7      TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:504:11)
#8      BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:282:5)
#9      BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:217:7)
#10     PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:475:9)
#11     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12)
#12     PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:122:9)
#13     _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8)
#14     PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:120:18)
#15     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:106:7)
#16     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19)
#17     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
#18     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
#19     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
#20     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
#21     _rootRunUnary (dart:async/zone.dart:1196:13)
#22     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
#23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:987:7)
#24     _invoke1 (dart:ui/hooks.dart:275:10)
#25     _dispatchPointerDataPacket (dart:ui/hooks.dart:184:5)

Unfortunately I can not provide any debug information, when starting the app through flutter run, as there seems to be a bug with iOS hiding important exceptions from frameworks like flutter (see flutter/flutter#41133), so the only way to fetch information (at least the one I know about) is through XCode.

Except from running flutter pub get and flutter build ios (to resolve initial build error in XCode) I didn't changed anything in the example app.

Though, there is one thing I noticed that's different from the iOS setup guide: After unchecking and re-checking the capability "Background fetch" in XCode, following block is not added to file project.pbxproj (which, as I understood, should be added automatically by XCode):

SystemCapabilities = {
	com.apple.BackgroundModes = {
		enabled = 1;
	};
};

Unfortunately, adding it manually does not seem to have any effect.

Output of flutter doctor -v

[✓] Flutter (Channel stable, v1.17.5, on Mac OS X 10.15.5 19F101, locale en-GB)
    • Flutter version 1.17.5 at /opt/flutter
    • Framework revision 8af6b2f038 (2 weeks ago), 2020-06-30 12:53:55 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4

[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from:
      https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK
      components.
      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup
      for detailed instructions).
      If the Android SDK has been installed to a custom location, set
      ANDROID_SDK_ROOT to that location.
      You may also want to add it to your PATH environment variable.


 
[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.3

[!] Android Studio (not installed)
    • Android Studio not found; download from
      https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup
      for detailed instructions).

[✓] VS Code (version 1.47.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.12.2

 
[✓] Connected device (1 available)            
    • iPhone xxx xxxxxxxx • a196bfcb78b38a0f88a8xxxxxxxxxxxxxxxxxxx • ios •
      iOS 13.5.1

The text was updated successfully, but these errors were encountered:

lymanlai · 2020-07-16T09:14:10Z

I have the same issue, I just read over the apple's https://developer.apple.com/documentation/backgroundtasks doc, I think the example missing the "Permitted background task scheduler identifiers" part,will test this tomorrow

gebsl · 2020-07-16T09:19:15Z

As I understood, those identifiers are only needed for the API that was introduced in iOS 13 (Background Task API), which lets you specify tasks similar to Android's WorkManager. But for simple Background Fetch, those identifiers should not be needed.
But as I'm not a native iOS developer, my understanding might be wrong.

Kymer · 2020-07-16T11:08:09Z

Indeed, the identifier isn’t necessary because the plug-in uses the older background fetch API, not the iOS 13 task based API.

I’ll look into this next week.

MuhammedRefaat · 2020-07-22T08:41:33Z

@Kymer This iOS issue is not related to the example app only, I'm facing it in my app after implementation for the whole functionality, and when I tried with the example app I found it happening there also.
Worth to mention that in Android it's working perfectly.

danielbruni · 2020-07-23T09:57:19Z

Same problem here.

gebsl · 2020-07-24T07:34:54Z

Please just thumb up the initial bug report instead of posting "Same here". This only pollutes the conversation and makes tracing important questions/answers difficult. Thanks!

mamedshahmaliyev · 2020-07-24T17:27:42Z

Finally i have found solution:

Make sure you have the followings in ios/Runner/GeneratedPluginRegistrant.m

#if __has_include(<workmanager/WorkmanagerPlugin.h>)
#import <workmanager/WorkmanagerPlugin.h>
#else
@import workmanager;
#endif

and inside (void)registerWithRegistry:(NSObject*) function:
[WorkmanagerPlugin registerWithRegistrar:[registry registrarForPlugin:@"WorkmanagerPlugin"]];

Keep in mind that ios/Runner/GeneratedPluginRegistrant.m file resets after every clean and build, so make sure that above is present before running app.

Also enable debug mode, when simulating background fetch from xcode.

cormalenv · 2020-07-25T10:59:39Z

[WorkmanagerPlugin registerWithRegistrar:[registry registrarForPlugin:@"WorkmanagerPlugin"]];

I can confirm this works in XCode. Thanks! However....If we run it from another IDE such as AS, GeneratedPluginRegistrant.m is automatically rebuilt, even without clean, so the workaround fails. I don't know enough to correct this at the plugin level.

mamedshahmaliyev · 2020-07-25T13:29:05Z

[WorkmanagerPlugin registerWithRegistrar:[registry registrarForPlugin:@"WorkmanagerPlugin"]];

I can confirm this works in XCode. Thanks! However....If we run it from another IDE such as AS, GeneratedPluginRegistrant.m is automatically rebuilt, even without clean, so the workaround fails. I don't know enough to correct this at the plugin level.

You can do it from another IDE as well, after run wait for pod install to finish, then manually edit GeneratedPluginRegistrant.m before build has been finished.

mamedshahmaliyev · 2020-07-25T15:36:24Z

Found better and permanent solution:

add following inside AppDelegate.swift

WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin"))

this is how my ios/Runner/AppDelegate.swift looks like:

import Flutter
import workmanager
import devicelocale
import flutter_local_notifications
import shared_preferences

@UIApplicationMain

@objc class AppDelegate: FlutterAppDelegate {

    override func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        GeneratedPluginRegistrant.register(with: self)
        
        WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin"))
        
        UNUserNotificationCenter.current().delegate = self

        UIApplication.shared.setMinimumBackgroundFetchInterval(TimeInterval(60*15))

        WorkmanagerPlugin.setPluginRegistrantCallback { registry in
            // registry in this case is the FlutterEngine that is created in Workmanager's performFetchWithCompletionHandler
            // This will make other plugins available during a background fetch
            //GeneratedPluginRegistrant.register(with: registry)
            
            DevicelocalePlugin.register(with: registry.registrar(forPlugin: "com.example.devicelocale.DevicelocalePlugin"))
            FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin"))
            FLTSharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin"))
            
        }

        return super.application(application, didFinishLaunchingWithOptions: launchOptions)

    }
    
    override func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert, .sound, .badge]) // shows banner even if app is in foreground
    }

}

cormalenv · 2020-07-26T02:27:14Z

Thanks @mamedshahmaliyev. Extending your results to AppDelegate.m (Obj-C), add:

#include "WorkmanagerPlugin.h"

and

[WorkmanagerPlugin registerWithRegistrar:[self registrarForPlugin:@"be.tramckrijte.workmanager.WorkmanagerPlugin"]];

AppDelegate.m ends up like this

#include "AppDelegate.h"
#include "GeneratedPluginRegistrant.h"
#include "WorkmanagerPlugin.h"

@implementation AppDelegate

void registerPlugins(NSObject<FlutterPluginRegistry>* registry) {
  [GeneratedPluginRegistrant registerWithRegistry:registry];
}

- (BOOL)application:(UIApplication *)application
    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   ...
    [GeneratedPluginRegistrant registerWithRegistry:self];
    [WorkmanagerPlugin registerWithRegistrar:[self registrarForPlugin:@"be.tramckrijte.workmanager.WorkmanagerPlugin"]];
    [WorkmanagerPlugin setPluginRegistrantCallback:registerPlugins];
   ...
  return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

@end

All seems to be good so far.

gebsl · 2020-07-26T20:36:22Z

@mamedshahmaliyev's solution for swift works like a charm, thank you a lot!

gareth-del · 2020-08-03T14:40:34Z

Found better and permanent solution:

add following inside AppDelegate.swift

WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin"))

this is how my ios/Runner/AppDelegate.swift looks like:

import Flutter
import workmanager
import devicelocale
import flutter_local_notifications
import shared_preferences

@UIApplicationMain

@objc class AppDelegate: FlutterAppDelegate {

    override func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        GeneratedPluginRegistrant.register(with: self)
        
        WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin"))
        
        UNUserNotificationCenter.current().delegate = self

        UIApplication.shared.setMinimumBackgroundFetchInterval(TimeInterval(60*15))

        WorkmanagerPlugin.setPluginRegistrantCallback { registry in
            // registry in this case is the FlutterEngine that is created in Workmanager's performFetchWithCompletionHandler
            // This will make other plugins available during a background fetch
            //GeneratedPluginRegistrant.register(with: registry)
            
            DevicelocalePlugin.register(with: registry.registrar(forPlugin: "com.example.devicelocale.DevicelocalePlugin"))
            FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin"))
            FLTSharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin"))
            
        }

        return super.application(application, didFinishLaunchingWithOptions: launchOptions)

    }
    
    override func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert, .sound, .badge]) // shows banner even if app is in foreground
    }

}

Based on your solution I get "No such module 'workmanager'. Do you know why? Thanks alot!

ivanjpg · 2020-08-10T22:51:53Z

Same issue as @gareth-del.

I would like to add that even if platform :ios is set to 10.0 or 11.0 (as I had first), the pod for workmanager will not install. It is not present under Local Podspecs folder neither listed in Podfile.lock.

I already try to delete Podfile.lock and then pod install, refreshing flutter packages using flutter pub cache repair and did a cleaning with flutter clean; nothing works. I'm running Flutter 1.20.1

suhail-zartek · 2020-08-11T08:31:48Z

@ivanjpg same issue here.Did you get the solution?

suhail-zartek · 2020-08-11T09:01:39Z

@mamedshahmaliyev please give me a solution for no such module

mamedshahmaliyev · 2020-08-11T12:03:54Z

@suhail-zartek , unfortunately i have no such problem, the only thing that comes to my mind is, make sure that there is workmanager folder inside ios/.symlinks/plugins folder, i think import module_name should be the same as in ios/.symlinks/plugins folder. If there is no such ios/.symlinks/plugins/workmanager folder search for similar name otherwise it means pod install does not install the workmanager plugin...

proninyaroslav · 2020-08-15T11:23:05Z

I have the same problem with unavailable workmanager import in AppDeletage.swift

cormalenv · 2020-08-15T11:55:13Z

@suhail-zartek , unfortunately i have no such problem, the only thing that comes to my mind is, make sure that there is workmanager folder inside ios/.symlinks/plugins folder, i think import module_name should be the same as in ios/.symlinks/plugins folder. If there is no such ios/.symlinks/plugins/workmanager folder search for similar name otherwise it means pod install does not install the workmanager plugin...

Try running pod install from the ios folder in terminal if its not there.

proninyaroslav · 2020-08-15T12:13:32Z

Try running pod install from the ios folder in terminal if its not there.

It doesn't work. .symlink/plugins dir doesn't contain workmanager dir. I also clean build and repair package cache.

proninyaroslav · 2020-08-15T14:43:19Z

It doesn't work. .symlink/plugins dir doesn't contain workmanager dir. I also clean build and repair package cache.

It's also not contained in Podfile.lock.

2math · 2020-08-19T10:42:51Z

same here, happens after upgraded Flutter from 1.17.5 to 1.20

cormalenv · 2020-08-19T12:18:09Z

same here, happens after upgraded Flutter from 1.17.5 to 1.20

Agree. I upgraded to 1.20.x and ended up with so many problems I went back to 1.17.x.

2math · 2020-08-19T13:28:34Z

Small fix on my side was to force the register as non optional ! as the plugin expects. It appears on 1.20 this self.registrar returns optional ?

WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin")!)

proninyaroslav · 2020-08-19T14:18:07Z

@2math
But this will not solve the problem of missing .symlink/plugins/workmanager dir

2math · 2020-08-19T14:26:51Z

for some reason after upgrading again to 1.20 I had the plugin. Need to mention that this time didn't call rm ios/Podfile Now when I run the project from android studio it hangs on sync with device for 5-6 min :) , when I run from XCode is OK, but not hot reload there. I'm right before releasing to production and can not afford v1.20+ :(

…

On Wed, Aug 19, 2020 at 5:18 PM Yaroslav Pronin ***@***.***> wrote: @2math <https://github.com/2math> But this will not solve the problem of missing .symlink/plugins/workmanager dir — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#189 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG5B7J2YQZHFHJSUA2VNPQDSBPNLBANCNFSM4O3BPGKA> .

-- Regards, Galeen

cormalenv · 2020-08-23T08:02:41Z

Is this a podfile related issue associated with flutter 1.20.x?. Creating a new podfile (flutter build iOS) in 1.20.x results in no reference to symlinks in the podfile. Whilst running pod install seems to set up all my other plugins in the symlinks folder it doesn't set up workmanager. When migrating to 1.20 you might receive an error that your podfile was outdated. Removing and rebuilding has the same effect as creating a new. Restoring to my old podfile even under 1.20.x placed workmanager back into symlinks and then runs fine.

I dont know enough to say how this should be resolved but it seems the new podfile format works fine for most of the plugins I am using just not workmanager so could this be resolved by a plugin fix? For reference I am still using mamedshahmaliyev's fix to make this work also.

gebsl · 2020-08-24T12:56:08Z

@cormalenv: Can described confirm your behaviour. New Podfile breaks compatibility with Workmanager. Using Podfile from Flutter 1.17 resolves the issue. However, Flutter 1.20 also seems to break compatibility with @mamedshahmaliyev fix.

cormalenv · 2020-08-24T14:03:27Z

@gebsl Ill run some more tests tomorrow and get back to you. Reading your flutter 1.20 thread, it looks like we are now hitting the same issue. @mamedshahmaliyev's fix is a workaround for the original bug here which still exists so it shouldnt be closed but the thread seems to be migrating now to a 1.20 issue so we probably can move over to there.

Adem68 · 2020-08-24T19:14:56Z

If anyone needs old Podfile (before Flutter 1.20 version) you can look to example app's Podfile.

cormalenv · 2020-08-25T00:13:51Z

@gebsl the only modification I made to @mamedshahmaliyev 's fix was @2math 's addition to register as non-optional

WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin")!)

Relevant sections of flutter doctor for reference in case.

[✓] Flutter (Channel stable, 1.20.2, on Mac OS X 10.15.6 19G73, locale en-AU)
    • Flutter version 1.20.2 at /.../development/flutter
    • Framework revision bbfbf1770c (11 days ago), 2020-08-13 08:33:09 -0700
    • Engine revision 9d5b21729f
    • Dart version 2.9.1

[✓] Xcode - develop for iOS and macOS (Xcode 11.6)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.6, Build version 11E708
    • CocoaPods version 1.9.3

I still think everything here might be workarounds given I am not seeing these same issue in other plugins. If I get time I will look further at PR options.

gebsl · 2020-08-25T06:01:53Z

@cormalenv: Thanks for the hint! Build seems to work on my side.

Summing up:

Using Podfile shipped with Flutter 1.17 (instead of upgrading to 1.20's Podfile) (thanks to @Adem68)
Registering the plugin as optional -> WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin")!) (thanks to @2math and @mamedshahmaliyev)

This seems to do the trick.

But totally agree with you, @cormalenv, this can only be temporary hacks for the plugin.

Unfortunately I'm too unexperienced in iOS development, so I won't be able to assist in finding the underlying problem in this plugin. Really appreciate your efforts!

proninyaroslav · 2020-08-25T08:38:48Z

If anyone needs old Podfile (before Flutter 1.20 version) you can look to example app's Podfile.

This issue is also with the connectivity package. Looks like 1.20 made changes to the plugin system, now requires action from plugin developers.

barrinhos123 · 2020-09-03T21:06:49Z

When I add
WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin")!) to AppDelgate.swift i get this error

Xcode build done.                                           35,8s
Failed to build iOS app
Exited (sigterm)
Could not build the application for the simulator.
Error launching application on iPhone 11 Pro Max.

Anyone has the same issue?

proninyaroslav · 2020-09-04T08:07:55Z

@barrinhos123
You should look at the build log in Xcode, Flutter is not verbose.

barrinhos123 · 2020-09-04T10:29:50Z

@barrinhos123
You should look at the build log in Xcode, Flutter is not verbose.

Problem solved thank you!

Masumi-M · 2020-09-16T04:32:11Z

For me, the code bellow appeared in GeneratedPluginRegistrant.m by downgrading the "workmanager" to ^0.1.5.

#if __has_include(<workmanager/WorkmanagerPlugin.h>)
#import <workmanager/WorkmanagerPlugin.h>
#else
@import workmanager;
#endif

More specifically I executed the next command after changing the dependencies inside pubspec.yaml to workmanager: ^0.1.5.

$ rm -rf ios/Podfile.lock
$ rm -rf ios/Pods
$ rm -rf pubspec.lock
$ flutter clean
$ flutter pub get
$ flutter build ios --release

=====

[My Environments]

$ flutter --version
Flutter 1.20.4 • channel stable • https://github.com/flutter/flutter.git
Framework • revision fba99f6cf9 (33 hours ago) • 2020-09-14 15:32:52 -0700
Engine • revision d1bc06f032
Tools • Dart 2.9.2

Masumi-M · 2020-09-16T04:36:59Z

In addition, I will share my AppDelegate.swift script too.
(Thanks to @mamedshahmaliyev.)

I add the ! after registrar like this.
WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin")!)

import Flutter
import workmanager
import shared_preferences

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    
    GeneratedPluginRegistrant.register(with: self)
    WorkmanagerPlugin.register(with: self.registrar(forPlugin: "be.tramckrijte.workmanager.WorkmanagerPlugin")!)
    UNUserNotificationCenter.current().delegate = self
    UIApplication.shared.setMinimumBackgroundFetchInterval(TimeInterval(60*10))

    WorkmanagerPlugin.setPluginRegistrantCallback { registry in        
        FLTSharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin")!)
        
    }

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

Theunodb · 2020-10-27T05:00:56Z

I've tried all suggestions above to no avail.

ngothanhtai · 2020-11-01T04:38:52Z

I tried this PR and it works for me. #218

MiguelSOliveira · 2020-11-02T22:10:48Z

That PR does not work for me.. Same "no such module.... " error on xcode..

May I ask how you're using it @ngothanhtai ?

I've done the following

on pubspec.yaml:

workmanager:
    git:
      url: git@github.com:ened/flutter_workmanager.git

Then remove pods and pod install and it still does not appear on Podfile.lock.

ngothanhtai · 2020-11-03T05:13:40Z

@MiguelSOliveira I specified the commit ref in the pubspec

workmanager:
    git:
      url: git@github.com:ened/flutter_workmanager.git
      ref: 1c4e162ea4e71855856fb9e55a1545b3dae9a25d

ujnamss · 2020-11-03T19:16:24Z

I am getting a permission error when trying to get this PR:

`pub get failed (server unavailable) -- attempting retry 6 in 32 seconds...

Git error. Command: git clone --mirror git@github.com:ened/flutter_workmanager.git /Users/ux/work/flutter/.pub-cache/git/cache/flutter_workmanager-b145eb908d4135eaccf9e2d27cfe2100402b3876

stdout:

stderr: Cloning into bare repository '/Users/ux/work/flutter/.pub-cache/git/cache/flutter_workmanager-b145eb908d4135eaccf9e2d27cfe2100402b3876'...

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.`

ivanjpg · 2020-11-18T19:31:13Z

Hi @ujnamss:

You can avoid that error if you change the url from git@github.com:ened/flutter_workmanager.git to https://github.com/fluttercommunity/flutter_workmanager.

I hope this helps.

ujnamss · 2020-11-25T01:23:40Z

Hi @ujnamss:

You can avoid that error if you change the url from git@github.com:ened/flutter_workmanager.git to https://github.com/fluttercommunity/flutter_workmanager.

I hope this helps.

Doesn't seem to work @ivanjpg - i still get Exception
Unhandled Exception: PlatformException(unhandledMethod("registerOneOffTask") error, Unhandled method registerOneOffTask, null, null)
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:582:7)
#1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:159:18)

#2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:332:12)
#3 Workmanager.registerOneOffTask (package:workmanager/src/workmanager.dart:124:32)
#4 registerPoppinsRefreshTask (package:poppins/main.dart:49:15)
#5 main (package:poppins/main.dart:66:3)

Tienisto · 2020-11-25T16:08:57Z

Hi @ujnamss:
You can avoid that error if you change the url from git@github.com:ened/flutter_workmanager.git to https://github.com/fluttercommunity/flutter_workmanager.
I hope this helps.

Doesn't seem to work @ivanjpg - i still get Exception
Unhandled Exception: PlatformException(unhandledMethod("registerOneOffTask") error, Unhandled method registerOneOffTask, null, null)
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:582:7)
#1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:159:18)

#2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:332:12)
#3 Workmanager.registerOneOffTask (package:workmanager/src/workmanager.dart:124:32)
#4 registerPoppinsRefreshTask (package:poppins/main.dart:49:15)
#5 main (package:poppins/main.dart:66:3)

"One Off Tasks" and "Periodic Tasks" only works on Android. See https://github.com/fluttercommunity/flutter_workmanager/blob/master/IOS_SETUP.md

As @ngothanhtai said, this is the fix for now:

workmanager:
    git:
      url: git@github.com:ened/flutter_workmanager.git
      ref: 1c4e162ea4e71855856fb9e55a1545b3dae9a25d

2math · 2020-12-21T15:39:39Z

I was pushed to migrate into new iOS build system and confirm this is the only solution for now to have workmanager in the symlink

  #currently ^0.2.3 not working with new build system
  workmanager:
    git:
      url: https://github.com/fluttercommunity/flutter_workmanager
      ref: 1c4e162ea4e71855856fb9e55a1545b3dae9a25d

rahulzs · 2021-03-01T17:14:31Z

Finally i have found solution:

Make sure you have the followings in ios/Runner/GeneratedPluginRegistrant.m

#if __has_include(<workmanager/WorkmanagerPlugin.h>)
#import <workmanager/WorkmanagerPlugin.h>
#else
@import workmanager;
#endif

and inside (void)registerWithRegistry:(NSObject*) function:
[WorkmanagerPlugin registerWithRegistrar:[registry registrarForPlugin:@"WorkmanagerPlugin"]];

Keep in mind that ios/Runner/GeneratedPluginRegistrant.m file resets after every clean and build, so make sure that above is present before running app.

Also enable debug mode, when simulating background fetch from xcode.

GeneratedPluginRegistrant

Can you please share the GeneratedPluginRegistrant.m file.

julianknaup · 2021-03-24T15:32:52Z

Since the WorkManager is described in this way: "Flutter WorkManager is a wrapper around Android's WorkManager and iOS' performFetchWithCompletionHandler" and performFetchWithCompletionHandler is deprecated for apps supporting iOS 13 and higher (replaced by BGAppRefreshTask), am I correct that there is no way for implementing WorkManager on iOS 13 and higher, because it uses the wrong/outdated API?

kimmy-wang · 2021-04-29T01:27:25Z

Why is there no SystemCapabilities attribute in this file project.pbxproj in my project？

ened · 2021-04-29T19:39:10Z

I have just verified this ticket can be closed - please see the Xcode screenshots:

And the resulting console logs after pressing that one:

Therefore closing this issue. Please open single, separate issues for specific questions or problems.

gebsl added the bug Something isn't working label Jul 15, 2020

Kymer added the iOS iOS specific label Jul 16, 2020

Kymer self-assigned this Jul 16, 2020

gebsl mentioned this issue Jul 16, 2020

🐞[Android] Getting a MissingPluginException for method registerOneOffTask while trying to chain multiple background task #187

Closed

4 tasks

gebsl mentioned this issue Aug 24, 2020

No support for flutter 1.20 #188

Closed

gebsl mentioned this issue Sep 5, 2020

MissingPluginException Exception in iOS - No implementation found for method registerPeriodicTask on channel be.tramckrijte.workmanager/foreground_channel_work_manager #209

Closed

4 tasks

futurelucas4502 mentioned this issue Feb 26, 2021

[QUESTION] Is this package still maintained? #246

Closed

ened closed this as completed Apr 29, 2021

jafitz26 mentioned this issue May 20, 2022

iOS set up error: type 'WorkmanagerPlugin' has no member 'registerTask' #391

Open

4 tasks

🐞[iOS] MissingPluginException in example app #189

🐞[iOS] MissingPluginException in example app #189

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