This is a trivial example that demonstrates the use of the MuPDF CocoaPod.
To build the example you should:
sudo gem install cocoapods
pod install (from the directory that contains Podfile)
then open MuPDF.xcworkspace (NOT MuPDF.xcodeproj) and build/run as usual. When run it'll display a simple hello-world.pdf.
This example is BSD licensed.
The MuPDF is licensed under the AGPL unless you have obtained a commercial license from Artifex.