问题
I just got this same error when using ZBarSDK, a bar scanning library for iOS. It runs fine when I upload it to my development device or test it on the iOS6 simulator. But when I try to run it for Distribution it fails with:
(null): File is universal (3 slices) but does not contain a(n) armv7s slice: /Users/quique123/Documents/iphone apps/ScanThis/ZBarSDK/libzbar.a for architecture armv7s
where libzbar.a is the library from the sdk.
Any ideas?
回答1:
Open up the ZBar code Mercurial code repo
http://zbar.hg.sourceforge.net/hgweb/zbar/zbar/summary
Go to the bz2/zip/gz links to download current source (in preferred format)
http://zbar.hg.sourceforge.net/hgweb/zbar/zbar/archive/fa84e0427c24.tar.bz2 (as of this post date) http://zbar.hg.sourceforge.net/hgweb/zbar/zbar/archive/fa84e0427c24.zip (as of this post date) http://zbar.hg.sourceforge.net/hgweb/zbar/zbar/archive/fa84e0427c24.tar.gz (as of this post date)
Open the 'iphone' subdirectory
Open the 'zbar.xcodeproj' file
In the scheme's menu select libzbar and build your own binary version in the supported architecture
Open the DerivedData for that project and navigate to Build/Products/
Look in all of the folders for libzbar.a
回答2:
Simply remove the bad architecture from Valid Architectures in Target Aguilar Settings and you're good to go :)
回答3:
When you have your target selected > Build Settings (All) > Architectures > Valid Architectures.
When you get the above error, remove the armv7s (probably says [armv7 armv7s] now) by double clicking the line and select armv7s and press the (-) button.
In my case, this solved the error. Not sure if this will have any downsides further on..
EDIT: now I am sure this has at least one downside: The project is not buildable for an iPhone 5. The solution for that, is recompiling the ZBar sources, as stated here: ZBar library for iPhone 5(ARMV7s)
回答4:
You can download the new build of ZBarSDK in URL below.
http://sourceforge.net/projects/zbar/files/iPhoneSDK/beta/
回答5:
I just replaced in Build Settings / Valid Architectures: "armv7" for 2 rows "armv6" and "armv7"
(Usually I used to get this linker error only when submitting to iTunes, but not debugging in device)
回答6:
Just remove the "armv7s", this will work :)
回答7:
Set 'Build Active Architecture Only' to YES for release. I fixed my problem by doing so as I was facing this same problem.
来源：https://stackoverflow.com/questions/12398433/apple-mach-o-linker-error-zbarsdk-error-when-building-for-distribution