I'm getting compiler warnings with AFNetworking, but shouldn't be. How do I fix it?

Question

I'm using the most excellent AFNetworking library in a project that I'm currently upgrading to iOS 6. I'm in the middle of the upgrade, whittling down the bunch of warnings that I get when compiling against the iOS 6 SDK.

AFNetworking gives me two warnings in all targets:

SystemConfiguration framework not found in project, or not included in
precompiled header. Network reachability functionality will not be available.

and

MobileCoreServices framework not found in project, or not included in
precompiled header. Automatic MIME type detection when uploading files
in multipart requests will not be available.

Here's the thing, though: those two libraries are added in all my targets. I'd like to get rid of those warnings the proper way; I won't modify the AFNetworking files. I suspect it's Xcode being silly. It's admittedly a small thing, but leaving warnings around is bad practice.

How can I remove those warnings?

I've tried restarting Xcode and cleaning. Both don't work.

Kokaras

Answer 1

I'm not sure if you're using CocoaPods or not but this is a known issue being tracked on the AFNetworking Github page.

I was able to fix this by adding the correct import statements directly to my `PROJECTNAME-Prefix.pch there I changed it to this.

#ifdef __OBJC__
  #import <UIKit/UIKit.h>
  #import <SystemConfiguration/SystemConfiguration.h>
  #import <MobileCoreServices/MobileCoreServices.h>
#endif

If you have something else in there don't delete it. Just add the imports for SystemConfiguration and MobileCoreServices.

For OS X:

#ifdef __OBJC__
    #import <Cocoa/Cocoa.h>
    #import <SystemConfiguration/SystemConfiguration.h>
    #import <CoreServices/CoreServices.h>
#endif

Baptista

I'm not using CocoaPods, just a straight clone from github. I added MobileCoreServices and SystemConfiguration for other libraries, so didn't have to add them for AFNetworking. – Kokaras

Adding the import statements I posted to your .pch file in the Supporting Files group in your Xcode project should work. I just verified this fixing the warnings in a blank project. – Baptista

Thank you for this. Sometimes when warning are still in Issue Navigator you have to remove derived data for current project in '~/Library/Xcode/Developer/DerivedData'. Then clean and build. Should works correctly. – Schnorkle

I several 'PARSE ISSUES' and 'SEMANTIC ISSUES' if I add it there. However if I add it to the AFHTTPClient.h then those errors disappear. – Kaciekacy

Yes the only way I was able to get the warnings to disappear was to do what Pritesh Desai said and add the two frameworks to the top of AFHTTPClient.h – Splat

I am using CocoaPods, so this solution with the .pch won't work because the library has already been compiled. Any other solutions? – Guess

@Guess this should work fine with CocoaPods you need to put this in your own .pch file and it will silence the warnings when linking from the generated static library – Baptista

but the warning is in the pods project... oh wait, my bad. it's in the AFIncrementalStore pod target... thanks! – Guess

@KeithSmiley I find it important to note that this has to be before the import of AFNetworking itself. – Ineffaceable

Answer 2

If you're using swift: Xcode compiles Swift code before the Prefix.pch file is compiled, so you'll get these warnings even if the correct imports are in your .pch file. The best solution I've found is to add them to the project's Bridging-Header.h file before importing AFNetworking:

#import <SystemConfiguration/SystemConfiguration.h>
#import <MobileCoreServices/MobileCoreServices.h>
#import "AFNetworking.h"

Illlooking

This worked for me. Key thing is to have the imports in both the PCH and the bridging header. Sequence is important so the imports must precede #import "AFNetworking.h" – Calabar

Answer 3

This has already been answered, but still, if you're developing a command line tool potentially to be compiled for both OS X and iOS (not App Store for sure), you can add this:

#ifdef __OBJC__
    #import <Foundation/Foundation.h>
    #import <SystemConfiguration/SystemConfiguration.h>

    #if TARGET_OS_IPHONE
        #import <MobileCoreServices/MobileCoreServices.h>
    #elif TARGET_OS_MAC
        #import <CoreServices/CoreServices.h>
    #endif

#endif

By evaluating the target you're compiling to, it will include the proper files.

Lundy