找不到Flutter插件`geolocator-Swift.h`文件

Question

我创建了一个小的Flutter插件，可用于监视Flutter应用程序中的位置变化（来源：https://github.com/baseflowit/flutter-geolocator）。在使用作为项目结构一部分的示例项目（由Flutter CLI生成）进行大量测试之后，我们决定发布该插件以使其可供全世界使用。

现在我们收到一些反馈，当您将在线Dart Packages repo中的软件包包含到Flutter App中时，iOS版本不会编译并返回以下异常：

/Users/maurits/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/geolocator-0.0.2/ios/Classes/GeolocatorPlugin.m:2:9:
fatal error: 'geolocator/geolocator-Swift.h' file not found

在调试模式下运行Flutter App时会发生此错误，但在使用flutter build ios --release创建iOS包时也会发生此错误。

我有点迷失这个错误来自，因为example应用程序是Geolocator项目的一部分工作没有任何问题。我知道geolocator/geolocator-Swift.h文件是自动生成的，所以对我来说看起来文件不会在最终的Dart包中结束。要运行最终的Dart包，我运行以下命令：

flutter packages pub publish

这是flutter doctor -v的输出：

[✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.13.5 17F77, locale en-NL)
    • Flutter version 0.5.1 at /Users/maurits/Developer/flutter
    • Framework revision c7ea3ca377 (4 weeks ago), 2018-05-29 21:07:33 +0200
    • Engine revision 1ed25ca7b7
    • Dart version 2.0.0-dev.58.0.flutter-f981f09760

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.0)
    • Android SDK at /Users/maurits/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.0
    • ANDROID_HOME = /Users/maurits/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
    • All Android licenses accepted.

[✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 9.4.1, Build version 9F2000
    • ios-deploy 1.9.2
    • CocoaPods version 1.5.3

[✓] Android Studio (version 3.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 25.0.1
    • Dart plugin version 173.4700
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)

[!] VS Code (version 1.24.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected devices (1 available)
    • iPhone X • 69C349CF-81E1-47E8-B35A-A149D885CE43 • ios • iOS 11.4 (simulator)

任何帮助将不胜感激。

Answer 1

由于插件是使用Swift编写的，因此消费的Flutter应用程序应该基于Swift项目模板：

$ flutter create -i swift my_app

将geolocator:添加到pubspec.yaml并为iOS构建my_app然后使用最新的Flutter beta为我工作。

[✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.13.5 17F77, locale en-US)

Answer 2

你去Ios / Podfile添加以下行：

use_frameworks! # required by Geolocator

如下所示

准备symlinks文件夹。我们使用符号链接来避免让Podfile.lock引用开发人员机器上的绝对路径。

use_frameworks! # required by Geolocator
system('rm -rf .symlinks')
system('mkdir -p .symlinks/plugins')

在此之后添加

config.build_settings['SWIFT_VERSION'] = '4.2'

如下：

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['ENABLE_BITCODE'] = 'NO'
      config.build_settings['SWIFT_VERSION'] = '4.2' # added this
    end
  end
end