javascript - Angular2/Javascript - 检索 for 循环内生成的变量的新值

Question

我愿意检索在 for 循环内更新的变量的值并在范围之外访问它。

为此我有:Page.html

<div [options]="Pages">
  <div *ngFor="#cat of category">
        <div class="newCategory">The new category will appear here!</div>
  <div>
</div>

Page.js

constructor(viewCtrl, http, navParams) {
   this.viewCtrl  = viewCtrl;
   this.navParams = navParams;
   this.http      = http;
   this.category  = null; 

   this.http.get('https://website.com/api', { search }).subscribe(data => {
     this.category = data.json().results; 
   }); 

  //I want to print the new value of 'this.category' here
  //e.g: console.log(this.category); 

  this.Pages = {
    pagination: '.swiper-pagination',
    slidesPerView: 1,
    paginationClickable: true,
    paginationBulletRender: function (index, className) { 
     //also I want to access it here  
     return '<span class="' + className + '">' + this.category[index+1] + '</span>';
    }
  }
}

我是否需要一个全局变量才能读取该变量的新值？或者我还需要别的东西吗？

Answer 1

最好的方法是存储 this.category 并将其在数组中循环，然后您将能够在 this.http 之外获取存储的值。获取()