解决编译时出现的警告：format string is not a string literal (potentially insecure)

 NSLog([NSString stringWithFormat:@"%@/%@B.jpg", createDir, uuid]);//这是我的写法

应该写成

 NSString *str = [NSString stringWithFormat:@"%@/%@B.jpg", createDir, uuid];

  NSLog(@"%@",str);