GUID 생성

#import <CoreFoundation/CFUUID.h>


- (NSString*)genGUID 

{

CFUUIDRef uuidRef = CFUUIDCreate(NULL);

CFStringRef uuidStringRef = CFUUIDCreateString(NULL, uuidRef);

CFRelease(uuidRef);

NSString *uuid = [NSString stringWithString:(__bridge NSString *)uuidStringRef];

CFRelease(uuidStringRef);

return uuid;

}