Question

我有一个Flutter插件成功运行在我新创建的Flutter-plugin项目上。 iOS和Android都可以成功运行此Flutter插件的example / lib / main.dart示例代码。

但是，一旦我尝试在另一个Flutter项目中使用该插件，那就是事情崩溃了。

到目前为止，我已经尝试了两种方法将自己编写的插件集成到另一个Flutter项目中：

在我的Flutter项目（我尝试在其中使用该插件的项目）中，我转到pubspec.yaml文件，然后编写：

我尝试了...本地路径集成：

dependencies:
  flutter:
    sdk: flutter
  my_plugin_name:
    path: ../../../Flutter_plugins/my_plugin_name/

或者我尝试了...远程集成：

dependencies:
  flutter:
    sdk: flutter
  my_plugin_name:
    git:
      url: https://github.com/XXXX/my_plugin_name.git

两个集成都可以正常工作，并且VSCode似乎可以正确导入插件！

但是这是东西崩溃的地方！！只要我向dependencies添加任何东西，事后便会崩溃。

要测试它是否有效，我打开Flutter项目，然后转到lib / main.dart：

在要集成该插件的项目的lib / main.dart中，我写的内容与在plugin-project的plugin-example文件夹中写的内容几乎相同（请参见下文中的代码）。

或者换句话说，我尝试运行与plugin-example文件夹给出的代码完全相同的代码，但是这次是在另一个导入了插件的Flutter项目中。

因此，我将示例代码粘贴到Flutter项目的lib / main.dart文件中。

在main.dart内部，添加以下导入：

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:my_plugin_name/my_plugin_name.dart';

。然后将代码粘贴到main.dart中：

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      platformVersion = await MyPluginNameClass.getVersion;
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }
    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text('$_platformVersion\n'),
        ),
      ),
    );
  }
}

此时，编译器没有给我任何错误或警告。一切似乎都很好。

但是，如果我建立并运行，我会同时遇到世界，IOS和Android的错误例外情况-为什么?????

在iOS上，错误消息为：

2018-12-23 14:32:52.179 xcodebuild[56661:1181076] [MT] PluginLoading: Required plug-in compatibility UUID D76765677-CB11-4D25-A34B-E33DB5A7C231 for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/KZLinkedConsole.xcplugin' not present in DVTPlugInCompatibilityUUIDs
2018-12-23 14:32:52.179 xcodebuild[56661:1181076] [MT] PluginLoading: Required plug-in compatibility UUID D76765677-CB11-4D25-A34B-E33DB5A7C231 for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/ColorSenseRainbow.xcplugin' not present in DVTPlugInCompatibilityUUIDs
2018-12-23 14:32:52.179 xcodebuild[56661:1181076] [MT] PluginLoading: Required plug-in compatibility UUID D76765677-CB11-4D25-A34B-E33DB5A7C231 for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/BBUDebuggerTuckAway.xcplugin' not present in DVTPlugInCompatibilityUUIDs
2018-12-23 14:32:52.180 xcodebuild[56661:1181076] [MT] PluginLoading: Required plug-in compatibility UUID D76765677-CB11-4D25-A34B-E33DB5A7C231 for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/Alcatraz.xcplugin' not present in DVTPlugInCompatibilityUUIDs
** BUILD FAILED **
Xcode's output:
↳
=== BUILD TARGET sqflite OF PROJECT Pods WITH CONFIGURATION Debug ===
/Users/user/Documents/flutter/.pub-cache/git/my_plugin_name-5cc22b5c6d2345ba1ab23a44324b222c68d24ab4/ios/Classes/MyPluginName.m:2:9: fatal error: 'my_plugin_name/my_plugin_name-Swift.h' file not found
#import < my_plugin_name/my_plugin_name-Swift.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
Could not build the application for the simulator.
Error launching application on iPhone XS.
Exited (sigterm)

（...我已经尝试过flutter clean或pod update，就像其他stackoverflow条目中提到的那样-但错误没有改变...）

在Android上，错误消息为：

Launching lib/main.dart on Android SDK built for x86 in debug mode...
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:packageDebug'.
> Execution of compression failed.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 25s
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

有人在这里做什么有任何线索吗？

集成本地或远程Flutter插件时我会错过什么？

Answer 1

结果表明不是插件添加问题！

在Flutter应用程序中拥有的大量资产是导致异常的原因。

从我将插件添加到我的应用程序那一刻起，我的Flutter应用程序崩溃肯定是一个偶然的巧合。这是误导。（因此，我认为异常也可能发生过-稍后，当我构建Flutter应用并添加更多代码时，可能是某种内存问题...或者你告诉我！）

一旦我移除了很大的资产（665 MB），插件集成就会顺利进行，并且没有任何异常。

该问题的难度转为另一个stackoverflow问题：How to integrate a large asset in my Flutter app

此查询可以关闭。

如何创建可在另一个Flutter项目中使用的Flutter插件？

1 个答案: