CocoaPods could not find compatible versions for pod 'Firebase/CoreOnly'

problem ：

I've update my flutter package to the last versions and now IOS doesn't work anymore. I have updated my flutter pack to the latest version , Now? IOS It doesn't work anymore .

When I try to update the pods it's shows this error: When I try to update pod when , It will show this error ：

    [!] CocoaPods could not find compatible versions for pod "Firebase/CoreOnly":    In Podfile:    cloud_firestore (from `.symlinks/plugins/cloud_firestore/ios`) was resolved to 0.0.1, which depends on    Firebase/Firestore (~> 6.0) was resolved to 6.0.0, which depends on    Firebase/CoreOnly (= 6.0.0)    cloud_functions (from `.symlinks/plugins/cloud_functions/ios`) was resolved to 0.0.1, which depends on    Firebase/Functions (~> 5.18) was resolved to 5.18.0, which depends on    Firebase/CoreOnly (= 5.18.0)

Here my pubspec.yaml (Firebase related): This is my pubspec.yaml（ And Firebase relevant ）：

firebase_core: "^0.4.0"firebase_auth: "^0.11.0"firebase_analytics: "^3.0.0"  cloud_firestore: "^0.11.0+1"cloud_functions: "^0.3.0"firebase_storage: "^3.0.0"firebase_messaging: "^5.0.1"

I've made various steps to try to fix: I have taken various steps to try to fix ：

flutter cleanflutter build iospod installpod updatepod repo updatepod install --repo-update

I've set platform :ios, '12.1' in Podfile and in Xcode as build target but nothing come back to works. I am here Podfile and Xcode Intermediate platform ：ios、'12.1' Set as build goal , But it didn't work .

Here my podfile: This is my podcast file ：

# Uncomment this line to define a global platform for your projectplatform :ios, '12.1'# 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  pods_ary = []  skip_line_start_symbols = ["#", "/"]  File.foreach(file_abs_path) { |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)        pods_ary.push({:name => podname, :path => podpath});      else        puts "Invalid plugin specification: #{line}"      end  }  return pods_aryendtarget 'Runner' do  use_frameworks!  # 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')  # Flutter Pods  generated_xcode_build_settings = parse_KV_file('./Flutter/Generated.xcconfig')  if generated_xcode_build_settings.empty?    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter packages get is executed first."  end  generated_xcode_build_settings.map { |p|    if p[:name] == 'FLUTTER_FRAMEWORK_DIR'      symlink = File.join('.symlinks', 'flutter')      File.symlink(File.dirname(p[:path]), symlink)      pod 'Flutter', :path => File.join(symlink, File.basename(p[:path]))    end  }  # Plugin Pods  plugin_pods = parse_KV_file('../.flutter-plugins')  plugin_pods.map { |p|    symlink = File.join('.symlinks', 'plugins', p[:name])    File.symlink(p[:path], symlink)    pod p[:name], :path => File.join(symlink, 'ios')  }endpost_install do |installer|  installer.pods_project.targets.each do |target|    target.build_configurations.each do |config|      config.build_settings['ENABLE_BITCODE'] = 'NO'    end  endend

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Solution ：

Reference resources ： https://stackoom.com/en/question/3nCVC