我把Firebase库添加到我的项目中，然后我得到了这个错误。当我编译它时，Xcode找不到一些目录。然而，它们在Pods目录中。
下面是错误日志：

ld: warning: directory not found for option '-F/Users/Erumaru/Library/Developer/Xcode/DerivedData/ToDoTogether-gkzytezmbbgkikgoxjpptxgrixil/Build/Products/Debug-iphonesimulator/GTMSessionFetcher'
ld: warning: directory not found for option '-F/Users/Erumaru/Library/Developer/Xcode/DerivedData/ToDoTogether-gkzytezmbbgkikgoxjpptxgrixil/Build/Products/Debug-iphonesimulator/GoogleToolboxForMac'
ld: framework not found GTMSessionFetcher
clang: error: linker command failed with exit code 1 (use -v to see invocation)

这是我的播客文件：

# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'

target 'ToDoTogether' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!
  platform :ios, '10.0'
    pod 'Firebase'
    pod 'Firebase/AdMob'  
    pod 'Firebase/Auth'
    pod 'Firebase/Crash'
    pod 'Firebase/Database'
    pod 'Firebase/Analytics'
    pod 'Firebase/Messaging'
    pod 'Firebase/RemoteConfig'
    pod 'Firebase/Storage'

  # Pods for ToDoTogether

end