我有一個包含一個表的組件,我在tBody內部的一行中調用ngFor,問題是我需要指向我要應用在要運行的表上加載ngFor的最後一個元素之後。在加載最後一個項目之後調用一個指令ngFor
這裏是我的組件
import {Component} from 'angular2/core';
import {InfScrollTableService} from './inf-scroll-table.service'
import {HTTP_PROVIDERS} from 'angular2/http';
import {InfScrollTableDirective} from './inf-scroll-table.directive'
@Component({
selector: 'my-app',
template: `
<table class="scrollable" infScrollTable>
<thead>
<tr>
<th class="small-cell">Code</th>
<th>Label</th>
<th>Area</th>
</tr>
</thead>
<tbody>
<tr *ngFor="#country of countries; #last=last" *ngIf="last">
<td class="small-cell">{{country.id}}</td>
<td><a href="#" >{{country.id}}</a></td>
<td>{{last}}</td>
</tr>
</tbody>
</table>
`,
providers: [InfScrollTableService, HTTP_PROVIDERS],
directives: [InfScrollTableDirective]
})
export class AppComponent {
public countries;
constructor(private _infScrollTableService: InfScrollTableService){
this._infScrollTableService.getCountries()
.subscribe(
data => {
console.log(data);
this.countries=data;
});
}
}
我的指令:
import {Directive, ElementRef} from 'angular2/core'
@Directive({
selector: '[infScrollTable]',
})
export class InfScrollTableDirective{
private _elem:HTMLTableElement;
constructor(el: ElementRef) { this._elem = el.nativeElement; console.log(el)}
bord(last:boolean){
if(!last){
return
}
console.log(this._elem)
var th = this._elem.tHead.rows[this._elem.tHead.rows.length - 1].cells;
var td = this._elem.tBodies[0].rows[0].cells;
var tdLen = td.length - 1;
var j = 0;
for (; j < tdLen; j++) {
if (th[j].offsetWidth > td[j].offsetWidth) {
td[j].style.width = th[j].offsetWidth + 'px';
th[j].style.width = th[j].offsetWidth + 'px';
} else {
th[j].style.width = td[j].offsetWidth + 'px';
td[j].style.width = td[j].offsetWidth + 'px';
}
}
}
}
在這裏,我想這最後的製作,我在ngIf通過的「最後」的最有意義的多的東西一個函數,但當我登錄在控制檯上收到的價值它是undefined
角1我達到了我想要的使用
$scope.$on('LastElem', function(){...})
引起重新渲染的數據更改如何?目前,即使只在中間插入或刪除,也會發生這種情況(我猜這將在未來進行優化)如果將某個項目附加到「國家/地區」,該怎麼辦? –