4
我已创建了一个管道数组排序,但是当我使用管道排序它说错误:TypeError:无法在SortPipe.transform中读取未定义的属性'sort',为什么?
Error: Uncaught (in promise): TypeError: Cannot read property 'sort' of undefined.
pipe.ts
import { Component, NgModule, Pipe, PipeTransform } from '@angular/core';
@Pipe({name: "sortBy"})
export class SortPipe {
transform(array: Array<string>, args: string): Array<string> {
array.sort((a: any, b: any) => {
if (a[args] < b[args]) {
return -1;
} else if (a[args] > b[args]) {
return 1;
} else {
return 0;
}
});
return array;
}
}
我已经包含在声明中SortPipe
和@NgModule的提供者。
pipe.html
<ion-item item-detail *ngFor="let exhibit of exhibits | sortBy : 'name'
let i = index" name="exhibit">
<h2>{{ exhibit?.name }}</h2>
<h5>{{ exhibit.plan }}</h5>
<h5>{{ exhibit.link }}</h5>
<h5>{{ exhibit.stall }}</h5>
<h5>{{ exhibit.description }}</h5>
</ion-item>