使用Objective-C创建UUID

- (NSString *)createUUID

{

    // Create universally unique identifier (object)

    CFUUIDRef uuidObject = CFUUIDCreate(kCFAllocatorDefault);

    

    // Get the string representation of CFUUID object.

    NSString *uuidStr = (NSString *)CFBridgingRelease(CFUUIDCreateString(kCFAllocatorDefault, uuidObject));

    

    CFRelease(uuidObject);

    

    return uuidStr;

}