The solution in this issue in this link https://github.com/nicklockwood/iRate. It is for ARC Compatibility.
As of version 1.7, iRate requires ARC. If you wish to use iRate in a non-ARC project, just add the -fobjc-arc compiler flag to the iRate.m class. To do this, go to the Build Phases tab in your target settings, open the Compile Sources group, double-click iRate.m in the list and type -fobjc-arc into the popover.
If you wish to convert your whole project to ARC, comment out the
#error line in iRate.m, then run the Edit > Refactor > Convert to Objective-C ARC... tool in Xcode and make sure all files that you wish to use ARC for (including iRate.m) are checked.