<p>Make sure your libzbar.a contains all the architectures you needed in your project. You may need following to build for device and simulator:</p>
<pre><code>armv7 armv7s arm64 i386 x86_64
</code></pre>
<p>You can test this using following command:</p>
<pre><code>xcrun -sdk iphoneos lipo -info libzbar.a
</code></pre>
<p>This tip was originally posted on <a href="http://stackoverflow.com/questions/22660361/Zbar%20SDK%20-%20missing%20required%20architecture%20x86_64/22664729">Stack Overflow</a>.</p>