如何通过nativescript-下拉插件实现listview中数据的按需排序？

const pullToRefresh = require("nativescript-pulltorefresh");

<GridLayout>
    <pullToRefresh:PullToRefresh
        id="pullToRefresh"
        refresh="{{ refreshList }}"
        (refresh)="onRefresh($event)">
        <ListView [items]="listItems">
            <ng-template let-item="item">
                <Label [text]="item"></Label>
            </ng-template>
        </ListView>
    </pullToRefresh:PullToRefresh>
</GridLayout>

listItems: Array<string> = ["Item 1", "Item 2", "Item 3"];
refreshList: boolean = false;

onRefresh(args) {
    this.listItems.sort(); // 对数组进行排序
    this.refreshList = false; // 刷新完成
    args.object.notifyPullToRefreshFinished(); // 通知下拉刷新组件刷新完成
}