iphone中生成随即GUID串的代码

                                                   iphone中生成随即GUID串的代码

+ (NSString*) stringWithUUID {
CFUUIDRef    uuidObj = CFUUIDCreate(nil);//create a new UUID
//get the string representation of the UUID
NSString    *uuidString = (NSString*)CFUUIDCreateString(nil, uuidObj);
CFRelease(uuidObj);
return [uuidString autorelease];
}