由于 podfile 中的模块化标头设置，Flutter iOS 无法构建

Question

我有一个运行良好的颤振应用程序。我正在更新我的 flutter 版本和我的一些插件的版本（在最新的 XCode 版本 11 上）。我无法再构建我的应用程序，因为发生以下两种情况之一：

1）如果我没有“use_modular_headers！” 在我的 podfile 中，尝试运行时出现此错误pod install：

The Swift pod `DKPhotoGallery` depends upon `SDWebImage`, which does 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.

2）如果我添加“use_modular_headers！” 到 podfile，然后我可以成功安装 podfile，但是在构建时失败并出现此错误：

fatal error: module map file '/Users/mbpro/Documents/Perkl/ios/Pods/Headers/Private/openssl_grpc/BoringSSL-GRPC.modulemap' not found

我发现的第二个错误是因为 GRPC 不支持模块化标题。这就是我卡住的地方，因为由于 flutter 从 pubspec 动态生成 podfile 的方式，似乎模块化标头是全局打开或关闭的，我无法专门为特定的 pod 打开模块化标头。

这是我的 pubspec 依赖项列表：

  cloud_firestore: 0.13.6
  firebase_auth: 0.16.1
  firebase_core:
  firebase_database:
  firebase_storage:
  firebase_messaging:
  google_sign_in:
  image_picker:
  image_cropper:
  intl:
  flutter_sound:
  flutter_launcher_icons:
  flushbar:
  file_picker:
  path_provider:
  #audioplayers:
  provider:
  sliding_up_panel:
  font_awesome_flutter:
  marquee:

对此的任何帮助将不胜感激！！它完全关闭了我的开发，因为升级后我无法构建以测试任何东西。

编辑：Flutter Doctor -v 输出（一切看起来都很好）

[?] Flutter (Channel stable, v1.17.3, on Mac OS X 10.15.5 19F101, locale en-US)
    • Flutter version 1.17.3 at /Users/mbpro/Downloads/flutter
    • Framework revision b041144f83 (8 days ago), 2020-06-04 09:26:11 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4


[?] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/mbpro/Library/Android/sdk
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /Applications/Android
      Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build
      1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[?] 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 (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 44.0.1
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build
      1.8.0_202-release-1483-b49-5587405)

[?] Connected device (1 available)
    • iPhone SE (2nd generation) • 9FC22937-91AB-4F22-BB1E-20FFB1CAF4C8 • ios •
      com.apple.CoreSimulator.SimRuntime.iOS-13-5 (simulator)

• No issues found!

Answer 1

经过很长时间的搜索，答案很简单。

1-导航到应用程序内的 ios 目录

2- 在文本编辑器中编辑 podfile

3-搜索 target 'Runner' do

4-use_frameworks!在下一行添加

5- 保存并运行您的应用

例如，在解决问题之前，我的完整podfile看起来像这样

# Uncomment this line to define a global platform for your project
# platform :ios, '9.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end

通过添加额外的行解决问题后，它看起来像

# Uncomment this line to define a global platform for your project
# platform :ios, '9.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end

Answer 2

我一整天都在使用非常相似的插件列表来解决同样的问题。

使用这个答案： 使用带有 CocoaPods 1.5 的静态库导入时没有这样的模块

我能够按如下方式修改 flutter pod 并构建项目：

# Uncomment this line to define a global platform for your project
platform :ios, '8.0'

inhibit_all_warnings! # ------------------> NEW

use_frameworks! # ------------------> NEW
dynamic_frameworks = ['BoringSSL-GRPC'] # ------------------> NEW

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}


def parse_KV_file(file, separator='=')
  file_abs_path = File.expand_path(file)
  if !File.exists? file_abs_path
    return [];
  end
  generated_key_values = {}
  skip_line_start_symbols = ["#", "/"]
  File.foreach(file_abs_path) do |line|
    next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
    plugin = line.split(pattern=separator)
    if plugin.length == 2
      podname = plugin[0].strip()
      path = plugin[1].strip()
      podpath = File.expand_path("#{path}", file_abs_path)
      generated_key_values[podname] = podpath
     else
      puts "Invalid plugin specification: #{line}"
     end
  end
  generated_key_values
end

target 'Runner' do
  # Flutter Pod

  copied_flutter_dir = File.join(__dir__, 'Flutter')
  copied_framework_path = File.join(copied_flutter_dir, 'Flutter.framework')
  copied_podspec_path = File.join(copied_flutter_dir, 'Flutter.podspec')
  unless File.exist?(copied_framework_path) && File.exist?(copied_podspec_path)
    # Copy Flutter.framework and Flutter.podspec to Flutter/ to have something to link against if the xcode backend script has not run yet.
    # That script will copy the correct debug/profile/release version of the framework based on the currently selected Xcode configuration.
    # CocoaPods will not embed the framework on pod install (before any build phases can generate) if the dylib does not exist.

    generated_xcode_build_settings_path = File.join(copied_flutter_dir, 'Generated.xcconfig')
    unless File.exist?(generated_xcode_build_settings_path)
      raise "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first"
    end
    generated_xcode_build_settings = parse_KV_file(generated_xcode_build_settings_path)
    cached_framework_dir = generated_xcode_build_settings['FLUTTER_FRAMEWORK_DIR'];

    unless File.exist?(copied_framework_path)
      FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)
    end
    unless File.exist?(copied_podspec_path)
      FileUtils.cp(File.join(cached_framework_dir, 'Flutter.podspec'), copied_flutter_dir)
    end
  end

  # Keep pod path relative so it can be checked into Podfile.lock.
  pod 'Flutter', :path => 'Flutter'
  # Plugin Pods

  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
  # referring to absolute paths on developers' machines.
  system('rm -rf .symlinks')
  system('mkdir -p .symlinks/plugins')
  plugin_pods = parse_KV_file('../.flutter-plugins')
  plugin_pods.each do |name, path|
    symlink = File.join('.symlinks', 'plugins', name)
    File.symlink(path, symlink)  
    pod name, :path => File.join(symlink, 'ios')
  end
end


pre_install do |installer|  # ------------------> NEW BLOCK
    installer.pod_targets.each do |pod|
puts "Evaluating static framework for pod #{pod.name}"
        if dynamic_frameworks.include?(pod.name)
            puts "Overriding the static_framework method for #{pod.name}"
            pod pod.name, :modular_headers => false        
end
    end
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
      config.build_settings['ENABLE_BITCODE'] = 'NO'
      end
  end
end

这是我第一次在 IOS 中构建应用程序，总构建时间约为 35m (!)，我不知道它是否与此修复有关，或者是其他什么。

还尝试执行相反的操作，所有动态和 DKPhotoGalley 静态，但这会使构建失败，并在 DKPhotoGallery 代码上出现错误。

如果有人可以提出更好的方法或理解根本问题，那就太好了。