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As long as flutter is data, it will be judged null

2022-07-29 07:40:00 【Dense breath】

flutter As long as it is data, it will be judged as null , If it is empty, an error will be reported , So when we call the network to request data , When obtaining data, it is necessary to judge null .
replyList! Namely replyList Can't be empty , If it is empty, an error will appear

  int getBirthday (){
    
    int bi = 0;
    if(replyList!=null){
    
      if(replyList!.otherInfo!=null){
    
        if(replyList!.otherInfo!.birthday!=null){
    
          bi = replyList!.otherInfo!.birthday!;
        }
      }
    }
    return bi;
  }