Arrays 从Json 5推入数组

我从一个端点收到以下响应

{
  "data": [{
    "volume": 4.889999866485596,
    "name": "Carton03",
    "weight": 5.75,
    "storage": 3
  }, {
    "volume": 2.6500000953674316,
    "name": "Carton02",
    "weight": 4.5,
    "storage": 2
  }, {
    "volume": 1.4500000476837158,
    "name": "Carton01",
    "weight": 5,
    "storage": 1
  }],
  "response": "true",
  "type": "Storages"
}

下面我尝试在我的组件上创建一个数组：

export class StorageComponent {
   private data: any;
   private stors: Storage [];

   constructor (private storageService: StorageService  ) {}

   storage () {
     this.data =  this.storageService.Storage(); 
     //storageService.Storage is an assistant service that parse the response 
     // and brings me back only the data-array of the response
     for (let i = 0; i < this.data.data.length; i++) {
      const storages = this.data.data[i];
      console.log(storages.storage);
      console.log(storages.name);
      console.log(storages.weight);
      console.log(storages.volume);
      this.stors[i] = storages;
     }   
  }
}

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有什么想法吗？

错误是在循环的第一次迭代期间，由于未定义

this.stors[0]

的赋值，因此不可能。

stors

属性尚未初始化。考虑：

constructor (private storageService: StorageService) {
    this.stors = [];
}

---

定义

stors

属性时只需进行初始化，如下所示：

private stors: Storage[] = [];

您还可以初始化其他属性：

private data: any = null;

您可以在构造函数或ngOnInit中初始化它，但我认为这样直接在属性中初始化数组是更好的方法

初始化类属性将避免此类行为

private data: any = null;