Node.js TypeError:无法设置属性'；地址'；在SafeSubscriber上未定义的的。\u下一步

我试图将数据传递到组件内部声明的数组，但我只获取数组的第一个索引，其他元素不返回

我读到程序是异步工作的，只得到第一个索引，他们还建议在for循环中更改var I，让I改变它

组成部分：

 weathers: Weather[] = [{adress:'',city:''}];
 weather: Weather;
 constructor(private weatherService: WeatherService) {
 }
 ngOnInit() {
 this.weatherService.getWeather().subscribe(weathers =>
{
  let size = (Object).keys(weathers).length;
  this.weathers =  Weather[size] = [{adress:'',city:''}];
  console.log(weathers);
  console.log(size);
    for(let i=0;i<size;i++) {
     const adress = weathers[i].adress;
     const city = weathers[i].city;
     this.weathers[i].adress=adress;
     this.weathers[i].city=city;
   }


  }
);
}

错误类型错误：

Cannot set property 'adress' of undefined
at SafeSubscriber._next (weather.component.ts:31)
at SafeSubscriber.__tryOrUnsub (Subscriber.js:185)
at SafeSubscriber.next (Subscriber.js:124)

---

您不应该以这种方式使用数组：

this.weathers=Weather[size]=[{地址：''，城市：'}]。制作阵列时，无需设置阵列的大小：

let size = (Object).keys(weathers).length;
this.weathers = [];
for(let i=0;i<size;i++) {
  const adress = weathers[i].adress;
  const city = weathers[i].city;
  this.weathers.push({'adress': adress, 'city': city});
}

Cannot set property 'adress' of undefined
at SafeSubscriber._next (weather.component.ts:31)
at SafeSubscriber.__tryOrUnsub (Subscriber.js:185)
at SafeSubscriber.next (Subscriber.js:124)

let size = (Object).keys(weathers).length;
this.weathers = [];
for(let i=0;i<size;i++) {
  const adress = weathers[i].adress;
  const city = weathers[i].city;
  this.weathers.push({'adress': adress, 'city': city});
}

console.log(weathers);
this.weathers = (Object).keys(weathers).map(key => {
  return {
    adress: weathers[key].adress,
    city: weathers[key].city
  }
}