typescript HTML + Ionic 3.x：如何在 html 文件中使用 for 循环使用 in 而不是
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HTML + Ionic 3.x: How to use a for loop in the html file using in instead of of
提问by J. Hesters
I have several arrays of objects in my typescript file.
我的打字稿文件中有几个对象数组。
I want to iterate through these arrays simultaneously and display their contents in the html file. Here is the content:
我想同时遍历这些数组并在 html 文件中显示它们的内容。以下是内容：
<ion-item>
{{array1[i]}} {{array2[i]}} {{array3[i]}}
</ion-item>
Luckily the arrays are always the same size. Now I want to do a for-loop after the ion-item (something like this):
幸运的是，数组总是相同的大小。现在我想在 ion-item 之后做一个 for 循环（类似这样）：
<ion-item *ngFor="let i in array1">
{{array1[i]}} {{array2[i]}} {{array3[i]}}
</ion-item>
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.
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。
<ion-item *ngFor="let counter of array1; let i = index">
{{array1[i]}} {{array2[i]}} {{array3[i]}}
</ion-item>
Any advice on how to do this more efficiently / pretty would be highly appreciated :)
关于如何更有效/更漂亮地执行此操作的任何建议将不胜感激:)
Thank you!
谢谢！
回答by Marouan
You last is the best yet, but here is an other way
你最后是最好的，但这是另一种方式
TS
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
HTML
<ion-item *ngFor="let item of globalArray;">
{{item.a1}} {{item.a1}} {{item.a1}}
</ion-item>
回答by Prosenjit Manna
This is pretty simple
这很简单
<ul>
<li *ngFor="let item of array1">{{item.property}}<li>
<ul>
<ul>
<li *ngFor="let item of array2">{{item.property}}<li>
<ul>
<ul>
<li *ngFor="let item of array3">{{item.property}}<li>
<ul>
