详解Angular2 关于*ngFor 嵌套循环

时间:2020-05-15 huangenai 人气:2

在项目开发中拿到的数据是这样的，要循环遍历出来。可是在ng2中好像不能直接遍历Object

 datas: any = [
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"},
 ];

在搜索之后发现了这种方法可以实现。

array-ngfor.ts

import { Component } from '@angular/core';

@Component({
 selector: 'page-array-ngfor',
 templateUrl: 'array-ngfor.html',
})
export class ArrayNgfor {

 constructor() { }

 datas: Array<any> = [
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
  { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24" },
 ];

 getKeys(item) {
  return Object.keys(item);
 }
}

array-ngfor.html

<ion-header>
 <ion-navbar>
  <ion-title>关于ngfor 嵌套循环</ion-title>
 </ion-navbar>
</ion-header>

<ion-content>
 <ion-row *ngFor="let item of datas">
  <ion-col *ngFor="let key of getKeys(item)"> {{ item[key] }}</ion-col>
 </ion-row>
</ion-content>

重点的是这个方法

 getKeys(item){
    return Object.keys(item);
  }

结果：

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