NG-ZORRO中Breadcrumb面包屑的使用

厍浩广
2023-12-01

html:

<nz-breadcrumb class="app-breadcrumb" nzSeparator="/">
<!--    <nz-breadcrumb-item>首页</nz-breadcrumb-item>-->
    <nz-breadcrumb-item *ngFor="let breadcrumb of breadcrumbs">
      <a [routerLink]="[breadcrumb.url, breadcrumb.params]">{{ breadcrumb.label }}</a>
    </nz-breadcrumb-item>
</nz-breadcrumb>

css

.app-breadcrumb {
    padding: 0 12px;
    line-height: 32px;
    background: #fff;
}

ts

import {filter} from 'rxjs/operators';
import {Component, OnInit} from '@angular/core';
import {ActivatedRoute, Router, Params, NavigationEnd, PRIMARY_OUTLET} from '@angular/router';
import { BreadcrumbOption } from 'ng-zorro-antd';

interface IBreadcrumb {
    label: string;
    params: Params;
    url: string;
}

@Component({
    selector: 'app-breadcrumb',
    templateUrl: './breadcrumb.component.html',
    styleUrls: ['./breadcrumb.component.scss'],
})
export class BreadcrumbComponent implements OnInit {
    public breadcrumbs: IBreadcrumb[];

    constructor(private activatedRoute: ActivatedRoute, private router: Router) {
        this.breadcrumbs = [];
    }

    ngOnInit(): void {
        this.router.events.pipe(filter((event) => event instanceof NavigationEnd)).subscribe((event) => {
            // 设置面包屑
            const root: ActivatedRoute = this.activatedRoute.root;
            this.breadcrumbs = this.getBreadcrumbs(root);
        });
    }

    /**
     * 返回表示面包屑的IBreadcrumb对象的数组
     */
    private getBreadcrumbs(route: ActivatedRoute, url: string = '', breadcrumbs: IBreadcrumb[] = []): IBreadcrumb[] {
        const ROUTE_DATA_BREADCRUMB = 'breadcrumb';
        const children: ActivatedRoute[] = route.children;
        // If there's no sub root, then stop the recurse and returns the generated breadcrumbs.
        if (children.length === 0) {
            return breadcrumbs;
        }
        for (const child of children) {
            if (child.outlet === PRIMARY_OUTLET) {
                // Only parse components in primary router-outlet (in another word, router-outlet without a specific name).
                // Parse this layer and generate a breadcrumb item.
                const routeURL: string = child.snapshot.url
                    .map((segment) => segment.path)
                    .filter((path) => path)
                    .join('/');
                const nextUrl = url + `/${routeURL}`;
                const breadcrumbLabel = child.snapshot.data[ROUTE_DATA_BREADCRUMB];
                // If have data, go to generate a breadcrumb for it.
                if (routeURL && breadcrumbLabel) {
                    const breadcrumb: BreadcrumbOption = {
                        label: breadcrumbLabel,
                        params: child.snapshot.params,
                        url: nextUrl.replace('//', '/'),
                    };
                    breadcrumbs.push(breadcrumb);
                }
                return this.getBreadcrumbs(child, nextUrl, breadcrumbs);
            }
        }
        return undefined;
    }
}

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