tab切换组件nz-tab

<nz-card [nzBordered]="true" nzTitle="卡片标题">
  <nz-card style="width: 100%;" nzTitle="Card title" [nzExtra]="extraTemplate">
    <nz-card-tab>
      <nz-tabset nzSize="large" [(nzSelectedIndex)]="selectIndex">
        <nz-tab [nzTitle]="item.title" *ngFor="let item of tabs" (nzClick)="tabTo(item)"></nz-tab>
      </nz-tabset>
    </nz-card-tab>
    <router-outlet></router-outlet>
  </nz-card>
</nz-card>

import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';
@Component({
  selector: 'app-card-whole-consume',
  templateUrl: './card-whole-consume.component.html',
  styles: []
})
export class CardWholeConsumeComponent implements OnInit {
  selectIndex = 0;
  tabs: any[] = [
    {
      key: 'dashboard',
      title: '标题1'
    }, {
      key: 'department-salary-setting',
      title: '标题2'
    }
  ];
  constructor(private router: Router) { }
  ngOnInit() {
    this.initTab();
  }
  initTab() {
    // 设置再次刷新页面时还是显示之前的tab
    const key = this.router.url.substr(this.router.url.lastIndexOf('/') + 1);
    const idx = this.tabs.findIndex(w => w.key === key);
    this.selectIndex = idx;
    this.router.navigateByUrl(`/cardWhole/${this.tabs[this.selectIndex].key}`);
  }
  tabTo(tab) {
     this.router.navigateByUrl(`/cardWhole/${tab.key}`);
  }
}