- (NSString *)generateUuidString
{
CFUUIDRef uuid = CFUUIDCreate(kCFAllocatorDefault);
NSString *uuidString = (NSString *)CFBridgingRelease(CFUUIDCreateString(kCFAllocatorDefault, uuid));
CFRelease(uuid);
return uuidString;
}
原文：http://www.cnblogs.com/yinyakun/p/3513612.html