Flutter项目添加Firebase后CocoaPods报FirebaseCore版本兼容错误

错误信息 #

[!] CocoaPods could not find compatible versions for pod "FirebaseCore":
      In Podfile:
        firebase_core (from `.symlinks/plugins/firebase_core/ios`) was resolved to 2.4.0, which depends on
          Firebase/CoreOnly (= 10.3.0) was resolved to 10.3.0, which depends on
            FirebaseCore (= 10.3.0)

        google_ml_kit (from `.symlinks/plugins/google_ml_kit/ios`) was resolved to 0.6.0, which depends on
          GoogleMLKit/LinkFirebase (~> 2.2.0) was resolved to 2.2.0, which depends on
            MLKitLinkFirebase (~> 1.3.0) was resolved to 1.3.0, which depends on
              FirebaseCore (~> 8.0)

当前Podfile内容 #

# Uncomment this line to define a global platform for your project
platform :ios, '11.0'

# 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!
  use_modular_headers!

  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

已尝试的无效步骤 #

• flutter clean
• flutter build ios
• pod install
• pod update
• pod repo update
• pod install --repo-update
• 删除Pods文件夹
• 删除Podfile.lock文件后重新执行pod install

可行解决方案 #

方案1：降级firebase_core到兼容版本

google_ml_kit 0.6.0依赖FirebaseCore ~>8.0，对应flutter的firebase_core需使用1.x系列版本（如1.24.0）。修改pubspec.yaml：

firebase_core: ^1.24.0

执行以下命令：

1. flutter pub get
2. 进入ios目录执行pod install

方案2：升级google_ml_kit到支持高版本Firebase的版本

查看google_ml_kit最新版本，更新至兼容FirebaseCore 10.x的版本（如0.17.0及以上）。修改pubspec.yaml：

google_ml_kit: ^0.17.0 # 或更高兼容版本

执行以下命令：

1. flutter pub get
2. 进入ios目录执行pod install --repo-update

方案3：强制指定FirebaseCore版本（不推荐）

若上述方案无法实施，可在Podfile的target 'Runner' do块内添加强制指定语句：

pod 'FirebaseCore', '~> 8.0'

然后删除Podfile.lock和Pods文件夹，执行pod install

内容的提问来源于stack exchange，提问作者Taco