突然之间，我无法运行使用Firebase的Flutter应用。
显然，pod安装过程存在问题，某些依赖项不兼容。 鉴于我没有更改yaml文件中的任何内容，并且该应用程序今天早上运行良好，因此我认为这些工具存在问题，而不是源代码存在。
问题在更新插件后出现，但是我不知道这两个问题是否相关。
这是构建输出：
以调试模式在iPhone XR上启动lib / main.dart ... 正在运行Pod安装... CocoaPods的输出： ↳ 准备
Analyzing dependencies
Inspecting targets to integrate
Using `ARCHS` setting to build architectures of target `Pods-Runner`: (``)
Fetching external sources
-> Fetching podspec for `Flutter` from `.symlinks/flutter/ios`
-> Fetching podspec for `cloud_firestore` from `.symlinks/plugins/cloud_firestore/ios`
-> Fetching podspec for `firebase_auth` from `.symlinks/plugins/firebase_auth/ios`
-> Fetching podspec for `firebase_core` from `.symlinks/plugins/firebase_core/ios`
-> Fetching podspec for `google_sign_in` from `.symlinks/plugins/google_sign_in/ios`
Resolving dependencies of `Podfile`
[!] CocoaPods could not find compatible versions for pod "Firebase/Auth":
In Podfile:
cloud_firestore (from `.symlinks/plugins/cloud_firestore/ios`) was resolved to 0.0.1, which depends on
Firebase/Auth
firebase_auth (from `.symlinks/plugins/firebase_auth/ios`) was resolved to 0.0.1, which depends on
Firebase/Auth (~> 5.19)
Specs satisfying the `Firebase/Auth, Firebase/Auth (~> 5.19)` dependency were found, but they required a higher minimum deployment target.
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:328:in `raise_error_unless_state'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:310:in `block in unwind_for_conflict'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:308:in `tap'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:308:in `unwind_for_conflict'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:257:in `process_topmost_state'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:182:in `resolve'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolver.rb:43:in `resolve'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/resolver.rb:91:in `resolve'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer/analyzer.rb:909:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer/analyzer.rb:907:in `resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer/analyzer.rb:114:in `analyze'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer.rb:266:in `analyze'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer.rb:174:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer.rb:173:in `resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/installer.rb:136:in `install!'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/command/install.rb:48:in `run'
/Library/Ruby/Gems/2.3.0/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.1/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:22:in `load'
/usr/local/bin/pod:22:in `<main>'
CocoaPods错误输出： ↳
[!] Automatically assigning platform `ios` with version `8.0` on target `Runner` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.
运行pod安装时出错 在iPhone XR上启动应用程序时出错。