无法在Xcode中调试：来自此模块的调试信息在调试器中不可用

Question

Debugging in Xcode is not possible after adding Firebase.

You cannot execute commands with expr and there is no variable information viewable.

Firebase was integrated without Cocoapods using these directions: https://firebase.google.com/docs/ios/setup#frameworks

Here's what Xcode displays after trying to execute a command with expr :

warning: Swift error in module Test.
Debug info from this module will be unavailable in the debugger.

error: in auto-import:
failed to get module 'Test' from AST context:
error: missing required module 'Firebase'

We're using Swift 3.

Answer 1

It's a bug of Xcode. i am facing the same problem. After some researches i found that this happens because of bad code, especially when you use closures. It is being reported as xcode bug, but there are some ways to fix it. Use print("") for debugging.

Answer 2

The problem was not updating User Header Search Paths with the directory containing module.modulemap .

Here are the instructions, accidentally overlooked, for manual installation:

If you're using Swift, or you want to use modules, drag module.modulemap into your project and update your User Header Search Paths to contain the directory that contains your module map.

The other hiccup was recognizing the correct directory path since we used groups to organize files, not folders.

May someone else benefit from our stupidity! :)

Answer 3

You have to add your modules like Firebase to your test-scheme in your podfile

Cocoapods

source 'https://github.com/CocoaPods/Specs.git'
# Uncomment the next line to define a global platform for your project
 platform :ios, '10.0'

target 'yourApp' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Pods for yourApp
  pod 'Alamofire', '4.4.0'
  pod 'Firebase', '4.3.0'

  target 'yourAppTests' do
    inherit! :search_paths
    # Pods for testing
    pod 'Firebase', '4.3.0'
  end

end

---

Manualy added

(I'm not 100% sure if this works)

1. Click on you Projekt in Xcode (the very first listpoint in your project)
2. Select at the Targets your test-target (yourAppTests)
3. Search for "other link" at 'Build Settings'
4. add to "Other Linker Flags"
   1. -ObjC
   2. -framework
   3. "GoogleToolboxForMac"
   4. -framework
   5. "nanopb"

Answer 4

I had the same problem when I was using XCode 9. I spend 2 hours searching for the solution then someone suggested me, I should run my code on XCode 10 (I'm still using XCode beta). It worked😃.

Hope that helps!!.