切换“点击”按钮(view_click)时出现ObjectUnsubscribedError。
ObjectUnsubscribedError {{name:“ObjectUnsubscribedError”,堆栈:
“ObjectUnsubscribedError:对象已取消订阅↵
一个…(ng:///AppModule/UserComponent.ngfactory.js:43:5)“,消息:“对象
退订”,ngDebugContext:DebugContext_,ngErrorLogger:ƒ}
查看如下:
<button class="btn" (click)="view_click(e)">Click</button>
<div class="container-fluid" *ngIf="list_v; ">
<div class="row">
<div class="col-md-12">
<div class="card">
<div class="header">
<h4 class="title">User List</h4>
<p class="category">List all users</p>
</div>
<div class="content table-responsive table-full-width">
<table datatable [dtOptions]="dtOptions" [dtTrigger]="dtTrigger" class="row-border hover" (click)="table_click($event.target)"></table>
</div>
</div>
</div>
</div>
</div>
组件如下:
import { AfterViewInit, Component, OnInit, ViewChild } from '@angular/core';
import { DataTableDirective } from 'angular-datatables';
import { HttpClient } from '@angular/common/http';
import { Subject } from 'rxjs/Subject';
@Component({
selector: 'app-user',
templateUrl: 'user.component.html'
})
export class UserComponent implements OnInit, AfterViewInit {
list_v=true;
constructor(private http: HttpClient){ }
view_click(e:HTMLElement){
if(this.list_v){
this.list_v=false;
}else{
this.list_v=true;
}
}
@ViewChild(DataTableDirective)
dtElement: DataTableDirective;
dtOptions: DataTables.Settings = {};
dtTrigger: Subject<any> = new Subject();
ngOnInit(): void {
this.dtOptions = {
ajax: 'http://localhost/angular/backend/users',
columns: [{
title: 'ID',
data: 'id'
}, {
title: 'Name',
data: 'name'
}, {
title: 'Action',
data: 'action'
}]
};
}
ngOnDestroy() {
}
ngAfterViewInit(): void {
this.dtTrigger.next();
}
table_click(e:HTMLElement){
// if(e.attributes.getNamedItem('delete_id')){
// var id=e.attributes.getNamedItem('delete_id').nodeValue;
// this.http.get('http://localhost/angular/backend/delete/user/'+id,)
// .subscribe(
// (data) => this.delete(data), //For Success Response
// err => {console.error(err)} //For Error Response
// );
// }
}
delete(data){
this.rerender();
}
rerender(): void {
this.dtElement.dtInstance.then((dtInstance: DataTables.Api) => {
// Destroy the table first
dtInstance.destroy();
// Call the dtTrigger to rerender again
this.dtTrigger.next();
});
}
}
最佳答案
似乎在进行重新渲染时,它会删除所有侦听器,因为重新渲染不是按角度进行的。因此,在重新渲染后,单击侦听器以某种方式工作,但“table_click(e:HTMLElement)”却无法工作。因此,您需要检查“角度数据表”存储库中是否存在类似问题。
我不确定100%,但是事实确实如此。