verBtn(){
      this.$message({
          message: "验证码已发送,请注意查收",
          type: 'success' //success/info/warning/error
      });
      this.vercount = 30;
      this.verdis = true;
      var vertimer = setInterval(()=>{
        if(this.vercount<=1){
          this.verdis = false;
          this.vercount = 0;
          clearInterval(vertimer);
        }else{
          this.vercount --
        }
      },1000)
    }