如何在ionic3中迭代数组内的数组？

Question

我试图得到一个产品列表，我正在遇到一个问题，因为它是一个数组，内部数组多个数组用于如何迭代我试过的对象内的数组但是在html中显示对象对象告诉任何人如何迭代数组？

/*
  @Copyright Notice:
  @(#)
  @Type: TS	
  @For:  create-accont.html.
  @Description : getInitiallyCategoryProducts function for get the list of products
*/
getInitiallyCategortProducts(categoryKeyId , subCategoryKeyId){
  let self       = this;

  if(categoryKeyId != undefined) {
    let object = {
      categoryKeyId    : categoryKeyId,
      subCategoryKeyId : subCategoryKeyId
    }

    //show the laoder after load the products
    let loading = self.loadingCtrl.create({
      content: "Loading..."
    });
    loading.present();

    //call function for checkDesingNumberInGCP for check desing number is exist or not		
    self.sellerAuthData.getProductsByCategoryWiseInGCP(function(isSuccess, data) {
      if(data.isSuccess && data.UserProductList) {
        self.sellerProductListViaCategory = data.UserProductList;

        //Disable the loader after response is generated
        loading.dismiss();
      } else {
        console.log("isCreated false from the API");
      }
    }, object);
  } else {
    console.log("object is undeined or null");
  }
}

<ion-list style=" margin-top: 48px;">
  <ion-card *ngFor="let userProduct of sellerProductListViaCategory">
    <ul class='imageList'>
      <span *ngFor="let productSet of userProduct.sellerProductSetDto">
         <li *ngFor="let imageURL of productSet.setImageURLList">
          <img src="{{imageURL}}">
        </li> 
        <ion-icon ios="ios-close-circle" md="md-close-circle"></ion-icon>
      </span>
    </ul>
  </ion-card>
</ion-list>