I'm trying to add Internet access to my application and in order to do this, I am testing to see whether or not the user is connected to a Wifi/3G network. To do this, I followed Apple's Reachability sample code and added Apple's Reachability.h and Reachability.m to my project. When I try to run the project at this point (I haven't even added any code accessing the Apple's Reachability files), I get 13 errors. This seems normal, as I have not yet added the SystemConfiguration framework to my project, but when I do add it, I still get the same errors, making me wonder if I'm adding frameworks correctly.
To add the framework, I went to...
Project > Targets > Build Phases > Link Binary with Libraries > The + Button > Add SystemConfiguration. Framework
Has anyone else had this issue and figured something out?
Images of Errors showing "Automatic Reference Counting Issue"
http://farm8.staticflickr.com/7034/6461498873_5faeae2db3_b.jpg
http://farm8.staticflickr.com/7017/6461499405_1e679067e2_b.jpg
These are ARC errors, your project appears to be set to use ARC but the Reachability classes are not written to support ARC, you will need to disable ARC for Reachability.m
See how to do that here, How can I disable ARC for a single file in a project?
Related
I'm new to iOS and trying to use RestKit.
I'm getting a 'sigabrt' exception during Singleton instantiation dealing with the use of autoRelease.
I noticed that RestKit uses memory management keywords that are not allowed in iOS projects w/ Automatic Reference Counting (ARC) enabled, could this be an issue?
Anyone encountered anything similar?
I'm surprised you were able to get the project to compile with those keywords.
You will need to use the linker flag -fno-objc-arc in the Compile Sources section of your Build Settings for all RestKit files, or include it as a project that does not use ARC (a much better approach).
Refer to the RestKit installation docs for help on this: https://github.com/RestKit/RestKit/wiki/Installing-RestKit-in-Xcode-4.x . Installing as a git submodule is the way to go imho.
You can easily add the library to a project that use automatic reference counting (ARC) by following the steps below.
Add the Rest kit files to your project.
Go to your project settings, select your application's target(s) and click the "Build Phases" tab.
Expand the section named "Compile Sources".
Select all the files from the RestKit library
Hit Enter to edit all the files at once, and in the floating text-box add the -fno-objc-arc compiler flag.
Thanks.
OK - found the problem: it seems the '-ObjC -all_load' key disappeared, I thoroughly followed RestKit's install instructions but this seemed to have slipped somehow - jshin thanks for making me look through the installation help again :)
Coming from .NET world I have to say XCode/ObjectiveC feel extremely archaic in comparison, just adding a library is a 10 page manual and not to mention the exception that made no sense what's so ever or gave any useful info - but then again this is coming from someone who's new to iOS :)
I have an Iphone app that used the excellent ABContactHelper library origionally written for by Erica Sedun and released on github
Now with the release of XCode4 and Reference Counting support, it causes lots of errors. I have looked at the forks on github, but none seem to have updated to XCode 4 with Reference Counting. I am trying to update it myself but its slow and error prone. I have tried the automatic refactoring support, but to no avail.
Does anyone know of an alternative AddressBook wrapper that provides a simple interface for interacting with the IPhone AddressBook?
In your ARC-enabled project, you can selectively disable ARC for the AddressBook wrapper files by setting the -fno-objc-arc compiler flag for those files.
Add compiler flags in Targets -> Build Phases -> Compile Sources. Enter the compiler flag by double-clicking on the right column of the row under Compiler Flags.
Dealing with ARC/non-ARC issues is a pain in the butt, and I've found that letting CocoaPods handle these problems for me is the way to go. Simply list ABContactHelper as a pod dependency and you're done. Many of the most popular libraries are already there, but if yours isn't, it's really easy to add it.
http://cocoapods.org
I am trying to build an App using the GData static library libGDataTouchStaticLib.a
I have made all the appropriate linkings in my project settings and have copied GDataXMLNode.h and GDataXMLNode.m to my project.
I am receiving the error below. Can someone help me understand what this is?
ld: duplicate symbol _kGDataXMLXPathDefaultNamespacePrefix in
/Users/myUser/Library/Developer/Xcode/DerivedData/GData-edmqtrniowvhfjgfgngtlfxttvri/Build/Products/Debug-iphoneos/libGDataTouchStaticLib.a(GDataXMLNode.o) and
/Users/myUser/Library/Developer/Xcode/DerivedData/MyApp-grzimbvctfmwhmdluxbuxmskcvzy/Build/Intermediates/MyApp.build/Debug-iphoneos/MyApp.build/Objects-normal/armv7/GDataXMLNode.o for architecture armv7
Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/clang failed with exit code 1
You shouldn't have to copy in GDataXMLNode.h and GDataXMLNode.m to your project. I believe the reason you are getting the duplicate symbol error is because the libGDataTouchStaticLib.a library already contains the compiled GDataXMLNode.m class.
I am currently using the GData library in a project I am working on, and got it set up by using these instructions: http://hoishing.wordpress.com/2011/08/23/gdata-objective-c-client-setup-in-xcode-4/, so this answer assumes that you have the same setup. However I have used a slightly different way of importing the headers that was suggested by one of the comments on the above blog.
In your Xcode project remove the GDataXMLNode.h and GDataXMLNode.m files, and make sure that the GData.xcodeproj project is linked into your project the same way as in the above blog, but do not drag the headers directory to your source tree. Add these arguments to the Debug and Release Header Search Paths of your current target instead:
/usr/include/libxml2
${BUILT_PRODUCTS_DIR}/Headers
You can find this under the Build Settings tab of your target. The second argument will import all the GData headers into your project if you have set up the GData.xcodeproj file correctly. Once you have done this you should be able to import the various GData classes including GDataXMLNode.h class wherever you need it by typing this at the top of the appropriate class:
#import "GDataXMLNode.h"
Much credit goes to Kelvin's blog for his great tutorial. Hope that helps!
When i created my project, i made it to support ARC, so my project will support iOS 4.3 and above.
Now i need to integrate Twitter and Facebook to it. Both Facebook and Twitter frameworks given by the companies does not support ARC.
Most of the files have dealloc, and released its variables. Some say to scrap the project and redo it disabling ARC. But, i can't afford to do this, since i have done most of the stuff.
I added the FBConnect files (there were 4 of them) and added -fno-objc-arc as described in this tutorial. Still i get
file://localhost/Users/illepmorgan/Documents/Projects/illep/untitled%20folder/alphaproject/alphaproject/FBRequest.m: error: Automatic Reference Counting Issue: Existing ivar '_delegate' for unsafe_unretained property 'delegate' must be __unsafe_unretained
I need help, i can't redo this again.
Make sure that you added the -fno-objc-arc flag to each implementation file (.m file).
And then clean the project (Project menu -> clean) and build again. I have sometimes had to clean and build twice when doing this in class. Seems like a little bug.
there is actually a much easy way working in mixed ARC and Facebook none ARC .
see my post on how to use it
http://nabtech.wordpress.com/2012/02/02/facebook-ios-sdk-and-arc/
I have an existing iPhone application, and I just wanted to make a static library out of the code, so that I can use it by a separate test application (within the workspace). The application compiles fine, but when I try to compile the library version (which has the same code files) I get the following error:
Lexical or Preprocessor Issue - "MyClass.h" file not found
However, the application still runs, even through there is this error. In fact when I compile the application (which uses the static library) it initially says no errors, and then after a second or two the above mention error then appears.
I'm basically doing:
Create a new target in the project using the Coco Touch Static Library
Add the .m files in the targets "Compile Sources"
Adding the .h files in the targets "Copy Headers"
Adding the same set of libraries in the "Link binaries with libraries"
Go into the Profile and modified the Target to be RELEASE
Any suggestions? Am I missing a step here?
I'll have a stab at this :-) I think it might be that MyClass.h has been set to private. Thus it is not added to header directory when you create the static library. You should check to see if this is so by checking the output header directory. If the header file is missing, then it's pretty sure thats whats going on.
Secondly, why use a seperate app for testing and therefore require building a static library at all? I have several static libraries and apps which I unit test with GHUnit. I do it by simply adding a new app target and configuring it to run the GHUnit iOS app. I can then add the classes I want to test and any testing frameworks such as OCMock without having to create separate projects. Basically it sounds like your testing methodolody is perhaps more complex than necessary. :-)
So, the issue turned out to be I had "-ObjC" set in the "Other Link Flags" option, which I'd put there as at one stage trying to get things working I read this was required - Dereks advice to review the compilation log worked well here