flutter - 使用 pod 依赖项创建 Flutter 插件

Question

我创建了一个带有“FacebookShare”依赖项的flutter插件。
我的 pods 规范如下，

Pod::Spec.new do |s|
  s.name             = '{plugin name}'
  s.version          = '0.0.2'
  s.summary          = 'A new Flutter plugin for share image and text in social media'
  s.description      = <<-DESC A new Flutter plugin for share image and text in social media
                       DESC
  s.homepage         = 'https://github.com/jayarajm/flutter_share_social_media.git'
  s.license          = { :file => '../LICENSE' }
  s.author           = { '...' => '...' }
  s.source           = { :path => '.' }
  s.source_files = 'Classes/**/*'
  s.public_header_files = 'Classes/**/*.h'
  s.dependency 'Flutter'
  s.dependency 'FacebookShare'

  s.ios.deployment_target = '8.0'
  s.static_framework = true
end

在示例项目中，插件引用了本地路径。所以我没有收到任何安装 pod 或运行项目的问题。
发布到“ https://pub.dartlang.org/”后。

我尝试在我的项目中使用 from dart 包，但在安装 pod 时遇到问题。我附上了下面的错误，

CocoaPods' output:
↳
      Preparing
    Analyzing dependencies
    Inspecting targets to integrate
      Using `ARCHS` setting to build architectures of target `Pods-Runner`: (``)
    Fetching external sources
    -> Fetching podspec for `Flutter` from `.symlinks/flutter/ios`
    -> Fetching podspec for `flutter_share_social_media` from `.symlinks/plugins/flutter_share_social_media/ios`
    Resolving dependencies of `Podfile`
    Comparing resolved specification to the sandbox manifest
      A Bolts
      A FBSDKCoreKit
      A FBSDKShareKit
      A FacebookCore
      A FacebookShare
      A Flutter
      A flutter_share_social_media
    Downloading dependencies
    -> Installing Bolts (1.9.0)
      > Copying Bolts from `/Users/jayaraj_m/Library/Caches/CocoaPods/Pods/Release/Bolts/1.9.0-ac656` to `Pods/Bolts`
    -> Installing FBSDKCoreKit (4.40.0)
      > Copying FBSDKCoreKit from `/Users/jayaraj_m/Library/Caches/CocoaPods/Pods/Release/FBSDKCoreKit/4.40.0-ae214` to `Pods/FBSDKCoreKit`
    -> Installing FBSDKShareKit (4.40.0)
      > Copying FBSDKShareKit from `/Users/jayaraj_m/Library/Caches/CocoaPods/Pods/Release/FBSDKShareKit/4.40.0-0e459` to `Pods/FBSDKShareKit`
    -> Installing FacebookCore (0.5.0)
      > Copying FacebookCore from `/Users/jayaraj_m/Library/Caches/CocoaPods/Pods/Release/FacebookCore/0.5.0-74288` to `Pods/FacebookCore`
    -> Installing FacebookShare (0.5.0)
      > Copying FacebookShare from `/Users/jayaraj_m/Library/Caches/CocoaPods/Pods/Release/FacebookShare/0.5.0-963b4` to `Pods/FacebookShare`
    -> Installing Flutter (1.0.0)
    -> Installing flutter_share_social_media (0.0.2)
      - Running pre install hooks
    [!] The following Swift pods cannot yet be integrated as static libraries:
    The Swift pod `FacebookCore` depends upon `Bolts` and `FBSDKCoreKit`, which do not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set `use_modular_headers!` globally in your Podfile, or specify `:modular_headers => true` for particular dependencies.
    The Swift pod `FacebookShare` depends upon `Bolts`, `FBSDKCoreKit`, and `FBSDKShareKit`, which do not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set `use_modular_headers!` globally in your Podfile, or specify `:modular_headers => true` for particular dependencies.
    The Swift pod `flutter_share_social_media` depends upon `Bolts`, `FBSDKCoreKit`, and `FBSDKShareKit`, which do not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set `use_modular_headers!` globally in your Podfile, or specify `:modular_headers => true` for particular dependencies.
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/lib/cocoapods/installer/xcode/target_validator.rb:135:in `verify_swift_pods_have_module_dependencies'
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/lib/cocoapods/installer/xcode/target_validator.rb:38:in `validate!'
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/lib/cocoapods/installer.rb:415:in `validate_targets'
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/lib/cocoapods/installer.rb:118:in `install!'
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/lib/cocoapods/command/install.rb:41:in `run'
    /usr/local/lib/ruby/gems/2.5.0/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/lib/cocoapods/command.rb:52:in `run'
    /usr/local/lib/ruby/gems/2.5.0/gems/cocoapods-1.5.3/bin/pod:55:in `<top (required)>'
    /usr/local/bin/pod:23:in `load'
    /usr/local/bin/pod:23:in `<main>'
Error output from CocoaPods:
↳
    [!] `<PBXGroup UUID=`97C146E51CF9000F007C117D`>` attempted to initialize an object with an unknown UUID. `CF3B75C9A7D2FA2A4C99F110` for attribute: `children`. This can be the result of a merge and the unknown UUID is being discarded.
    [!] Automatically assigning platform `ios` with version `8.0` on target `Runner` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.

Answer 1

我有一个类似的问题，具有相同的输出 <PBXGroup UUID... ，就我而言，当我运行 pod install --verbose我意识到在 pod install 期间出现了特定错误

undefined method `each_child' for #Dir:0x00007ff10befa7f0 Did you mean? each_slice

寻找这个特定的错误，我发现了这个 answer我意识到我使用的是 ruby​​ 2.5，而 Flutter 为 iOS 设备生成的一个文件试图使用 2.6 版中引入的方法。
按照该答案中的步骤操作后，我可以在 iOS 模拟器上运行我的 Flutter 应用程序。

The method dir.each_child was introduced in Ruby 2.6, but you are using Ruby 2.3.0.

You should update Ruby to 2.6.0 or later 2.x version.

After Ruby updating you may also need to restart your IDE and re-install cocoapods.