Flutter iOS pods 安装依赖 trunk URL couldn't be downloaded: xxxx Timeout was reached

执行 pod install 报错：

CDN: trunk URL couldn't be downloaded: https://cdn.jsdelivr.net/cocoa/Specs/f/a/f/QY_iOS_SDK/9.8.1/QY_iOS_SDK.podspec.json Response: Timeout was reached
CDN: trunk URL couldn't be downloaded: https://cdn.jsdelivr.net/cocoa/Specs/f/a/f/QY_iOS_SDK/9.9.0/QY_iOS_SDK.podspec.json Response: SSL connect error
CDN: trunk URL couldn't be downloaded: https://cdn.jsdelivr.net/cocoa/Specs/f/a/f/QY_iOS_SDK/9.9.1/QY_iOS_SDK.podspec.json Response: Timeout was reached
CDN: trunk URL couldn't be downloaded: https://cdn.jsdelivr.net/cocoa/Specs/f/a/f/QY_iOS_SDK/9.9.2/QY_iOS_SDK.podspec.json Response: Timeout was reached
....

解决方法

• 在 Podfile 文件中使用官方 Git 源替代 CDN，放到最顶部

  # 替换或注释掉原来的 source 行
  source 'https://github.com/CocoaPods/Specs.git'  # 使用 GitHub 源
  

  备用源：

  # 在 Podfile 顶部添加
  # 清华镜像
  source 'https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git' 
  # jsDelivr 备用
  source 'https://cdn.jsdelivr.net/gh/CocoaPods/Specs.git@master'      
  

• 清理缓存（可选，我没清也好了，不行在清理）

  $ cd ios
  # 清理缓存
  $ pod cache clean --all
  # 删除所有本地 repo
  $ rm -rf ~/.cocoapods/repos
  # 也可以 pod install --repo-update
  $ pod install
  

• 保存文件，然后运行：

  $ cd ios
  # 移除 trunk 源
  $ pod repo remove trunk
  # 也可以 pod install --repo-update
  $ pod install