问题
After changing
- #import <Cocoa/Cocoa.h> to #import <UIKit/UIKit.h>
- "pi" to "M_PI"
and disabling ARC for the GCMathParser files, I get the following error: (multiple places)
Cast of C pointer type "void*" to Objective-C pointer type "GCMathParser*" requires a bridged cast
What do I have to do?
Thanks
回答1:
ARC doesn't let you hide objects behind untyped pointers -- it needs to know which pointers are objects in order to do its magic. If you're dealing with a framework that relies heavily on that trick, you may have to do a fair amount of re-architecting it. Not fun.
You might try DDMathParser instead; it's functionally similar, more extensible, and supports ARC and iOS "out of the box".
来源：https://stackoverflow.com/questions/10850698/how-to-use-gcmathparser-in-ios-5-application-xcode-4-2-with-arc