HTML + Ionic 3.x:如何在 html 文件中使用 for 循环，使用 in 而不是 [英] HTML + Ionic 3.x: How to use a for loop in the html file using in instead of of

问题描述

我的打字稿文件中有几个对象数组.

I have several arrays of objects in my typescript file.

我想同时遍历这些数组并在 html 文件中显示它们的内容.内容如下:

I want to iterate through these arrays simultaneously and display their contents in the html file. Here is the content:

<ion-item>
  {{array1[i]}} {{array2[i]}} {{array3[i]}}
</ion-item>

幸运的是，数组的大小始终相同.现在我想在 ion-item 之后做一个 for 循环(类似这样):

Luckily the arrays are always the same size. Now I want to do a for-loop after the ion-item (something like this):

<ion-item *ngFor="let i in array1">
  {{array1[i]}} {{array2[i]}} {{array3[i]}}
</ion-item>

但是这样做会给我一个错误:无法绑定 'ngForIn'，因为它不是 'ion-item' 的已知属性.现在我找到了以下解决方法，但它看起来很丑陋.

But doing it this way gives me an error: "Can't bind 'ngForIn' since it isn't a known property of 'ion-item'. Now I've found the following workaround, but it seems pretty ugly.

<ion-item *ngFor="let counter of array1; let i = index">
  {{array1[i]}} {{array2[i]}} {{array3[i]}}
</ion-item>

任何关于如何更有效/更漂亮地做到这一点的建议将不胜感激:)

Any advice on how to do this more efficiently / pretty would be highly appreciated :)

谢谢！

推荐答案

你最后是最好的，但这是另一种方式

You last is the best yet, but here is an other way

TS

for(let i=0; i < n; i++){ // n is array.length
   this.globalArray.push({ a1 : array1[i] , a2 : array2[i] , a3 : array3[i] });
}

HTML

<ion-item *ngFor="let item of globalArray;">
  {{item.a1}} {{item.a1}} {{item.a1}}
</ion-item>

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