Flutter iOS真机无法连接Mac本地服务器，请求接口报‘No host path’错误求助

我遇到了一个Flutter iOS真机和Mac本地服务器的网络连接问题，折腾了好久没解决，来求助大家！

问题场景与现象 #

• 设备信息：iPhone 12 Pro（iOS 18.6）物理设备，和Mac处于同一WiFi网络
• 测试情况：
  • 用iPhone的curl命令可以正常访问Mac本地服务器192.168.1.170:8181
  • 用iPhone Safari也能打开服务器的Swagger文档页面
  • 但在Flutter app中请求该服务器的接口时，始终返回**'No host path'**错误
• 已尝试的操作：
  • 首次启动app时已经授予了网络权限
  • 参考过类似.NET后端的同类型问题解决方案，但没有效果

我的配置文件 #

Podfile

# Uncomment this line to define a global platform for your project
platform :ios, '15.0'

# 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__))
  target 'RunnerTests' do
    inherit! :search_paths
  end
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
      # You can remove unused permissions here
      # for more information: https://github.com/BaseflowIT/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      # e.g. when you don't need camera permission, just add 'PERMISSION_CAMERA=0'
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',
        ## dart: PermissionGroup.calendar
        ##'PERMISSION_EVENTS=1',
        ## dart: PermissionGroup.calendarFullAccess
        #'PERMISSION_EVENTS_FULL_ACCESS=1',
        ## dart: PermissionGroup.reminders
        #'PERMISSION_REMINDERS=1',
        ## dart: PermissionGroup.camera
        'PERMISSION_CAMERA=1',
        ## dart: PermissionGroup.photos
        'PERMISSION_PHOTOS=1',
        ## The 'PERMISSION_LOCATION' macro enables the `locationWhenInUse` and `locationAlways` permission. If
        ## the application only requires `locationWhenInUse`, only specify the `PERMISSION_LOCATION_WHENINUSE`
        ## macro.
        ##
        ## dart: [PermissionGroup.location, PermissionGroup.locationAlways, PermissionGroup.locationWhenInUse]
        'PERMISSION_LOCATION=1',
        'PERMISSION_LOCATION_WHENINUSE=0',
        ## dart: PermissionGroup.notification
        #'PERMISSION_NOTIFICATIONS=1',
        ## dart: PermissionGroup.mediaLibrary
        'PERMISSION_MEDIA_LIBRARY=1',
      ]
    end
  end
end

Info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>CFBundleDevelopmentRegion</key>
  <string>$(DEVELOPMENT_LANGUAGE)</string>
  <key>CFBundleDisplayName</key>
  <string>Teekit App</string>
  <key>CFBundleExecutable</key>
  <string>$(EXECUTABLE_NAME)</string>
  <key>CFBundleIdentifier</key>
  <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
  <key>CFBundleInfoDictionaryVersion</key>
  <string>6.0</string>
  <key>CFBundleName</key>
  <string>teekit_app</string>
  <key>CFBundlePackageType</key>
  <string>APPL</string>
  <key>CFBundleShortVersionString</key>
  <string>$(FLUTTER_BUILD_NAME)</string>
  <key>CFBundleSignature</key>
  <string>????</string>
  <key>CFBundleVersion</key>
  <string>$(FLUTTER_BUILD_NUMBER)</string>
  <key>LSRequiresIPhoneOS</key>
  <true/>
  <key>UILaunchStoryboardName</key>
  <string>LaunchScreen</string>
  <key>UIMainStoryboardFile</key>
  <string>Main</string>
  <key>UISupportedInterfaceOrientations</key>
  <array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
  </array>
  <key>UISupportedInterfaceOrientations~ipad</key>
  <array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
  </array>
</dict>
</plist>

我自己也梳理了几个可能的排查方向，但还没找到问题根源，也希望大家能补充更多思路： #

1. 是不是Flutter请求的URL格式有问题？比如漏加了http://协议头？
2. iOS的ATS配置是不是限制了本地HTTP请求？
3. 有没有可能是Flutter网络请求库的配置出错了？

求大家帮我看看可能的问题在哪里，有没有可行的解决办法？

内容来源于stack exchange