相关疑难解决方法(0)

使用Angular 2和打字稿.我有一个数组,我使用DoCheck和IterableDiffer来监听我的代码中的更改.当数组被更改时,我收到通知,但是当数组中某个对象内的属性发生更改时,我不会收到通知.我尝试使用KeyValueDiffer,但它不起作用.我想也许我需要以不同方式使用"_differs.find".有任何想法吗？

@Component({
    selector: 'test'
})
@View({
    template: `
    <div>hello!</div>`
})
export class MyComponent implements DoCheck {

private _differ: IterableDiffer;
private _differ2: KeyValueDiffer;
_myItems: MyItem[];
@Input()
set myItems(value: MyItem[]) {
    this._myItems = value;

    if (!this._differ && value) {
        this._differ = this._iterableDiffers.find([]).create(null);
    }
    if (!this._differ2 && value) {
        this._differ2 = this._differs.find(this._myItems).create(null);
    }
}
get myItems() {
    return this._myItems;
}

constructor(private _iterableDiffers: IterableDiffers, private _differs: KeyValueDiffers, private _myService: MyService) {
    this.myItems = _myService.getItems();
}

ngDoCheck() {

    var changes = this._differ.diff(this._myItems);

    if (changes) …