Xcode shows many errors but program compiles and runs fine (in both simulator and device)

Question

After installing the CocoaLumberjack\' log compressor class I\'ve been getting this annoying behavior: Xcode complains that there are many undeclared identifiers and gives m

Answer 1

I had this issue recently. It can be remedied in some cases by deleting the ModuleCache folder inside DerivedData, along with the project folder in DerivedData. Note that Xcode must be quit before doing this.