Undeclared identifier __bridge on xcode

Question

I am trying to convert a CFUUIDRef to a NSString *.

Before, I used the following code, and worked fine.

CFStringRef str = CFUUIDCreateString(NULL, _u         


        

Answer 1

__bridge is only defined with ARC (Automatic Reference Counting) enabled. It is used to "transfer objects in and out of ARC control". (Source)

To turn on ARC, go to your build settings and set Objective-C Automatic Reference Counting to Yes.

Or, if you do not want to use ARC, simply remove __bridge and it should work fine.