Question

我正在尝试从服务中获取价值。我需要将此值发送给其他服务。代码是这样的：

datameterId: string;

  ngOnInit() {
    this.graphCtrl.getMeter(this.id).subscribe(
            response => {
              this.ultimoValor = response["body"]["ultimoDatoConocido"];
              this.ultimoValorCierre = response["body"]["ultimoDatoCierreMes"];
              this.consumoMediaDiaria = response["body"]["consumoMedioDiario"];
              this.consumoMediaMensual = response["body"]["consumoMedioMensual"];
              this.consumoUltimoMes = response["body"]["consumoUltimoMes"];
              this.alertas = response["body"]["alarmasActivas"];
              this.contador = response["body"]["resumenDatameter"]["contador"];
              this.datameterId = response["body"]["resumenDatameter"]["id"];
            },
            error => {
              console.log(error);
            }
          );
        this.config();
         }

config() {
     console.log(this.datameterId); //NULL
}

问题：当我调用另一个函数时，值丢失了，所以我无法使用它。代码有什么问题？

更新

如果我把this.config（）;在响应中返回

Cannot read property 'every' of undefined
    at DaterangepickerComponent.push..

更新2

如果我删除

 this.ranges = {
      Hoy: [moment(), moment()],
      Ayer: [moment().subtract(1, "days"), moment().subtract(1, "days")],
      "Últimos 7 días": [moment().subtract(6, "days"), moment()],
      "Últimos 30 días": [moment().subtract(29, "days"), moment()],
      "Este mes": [moment().startOf("month"), moment().endOf("month")],
      "Mes pasado": [
        moment()
          .subtract(1, "month")
          .startOf("month"),
        moment()
          .subtract(1, "month")
          .endOf("month")
      ]
    };

不显示错误，但不起作用。数据范围需要工作的范围。

Answer 1

这是错误的，因为您调用函数而不必等待值。您需要在订阅内调用函数或使用async / await

 this.graphCtrl.getMeter(this.id).subscribe(res =>{
\\Do your stuff
this.config();

})

Answer 2

订阅后致电

 ngOnInit() {
    this.graphCtrl.getMeter(this.id).subscribe(
            response => {
              this.ultimoValor = response["body"]["ultimoDatoConocido"];
              this.ultimoValorCierre = response["body"]["ultimoDatoCierreMes"];
              this.consumoMediaDiaria = response["body"]["consumoMedioDiario"];
              this.consumoMediaMensual = response["body"]["consumoMedioMensual"];
              this.consumoUltimoMes = response["body"]["consumoUltimoMes"];
              this.alertas = response["body"]["alarmasActivas"];
              this.contador = response["body"]["resumenDatameter"]["contador"];
              this.datameterId = response["body"]["resumenDatameter"]["id"];


            this.config();<***************

            },
            error => {
              console.log(error);
            }
          );

         }

角度-调用函数时值丢失

2 个答案: