Question

我有一个页面组件，它通过服务加载内容。页面标题当前在ngOnInit中设置，但我想更改它以使用通过服务接收的数据设置页面标题。该服务收到的JSON标题为＆＃34;标题为＃34;带有页面标题字符串的字段。

现在代码看起来像：

import { Component, OnInit } from '@angular/core';
import { Title } from '@angular/platform-browser';
import { GetPageService } from '../shared/get-page/get-page.service';

@Component({
    selector: 'app-capabilities',
    templateUrl: './capabilities.component.html',
    styleUrls: ['./capabilities.component.scss']
})
export class CapabilitiesComponent implements OnInit {

    data: any[] = [];
    errorMessage: string;

    constructor(
        private titleService: Title,
        public getPageService: GetPageService
    ) { }

    ngOnInit() {
        this.getPage();
        // line below should be replaced so that title come from getPage data
        this.titleService.setTitle('Sample Page Title');
    }

    getPage() {
        this.getPageService.getPage('capabilities')
            .subscribe(
                data => this.data = data,
                error => this.errorMessage = <any>error
            );

    }

}

我已经尝试附加一个函数来订阅，但到目前为止我只是得到错误。任何暗示我指向正确方向的提示都会非常感激。

Answer 1

在subscribe()：

中设置标题

getPage() {
    this.getPageService.getPage('capabilities')
        .subscribe(
            (data: any) => {
              this.data = data;
              // Set the title here.
              this.titleService.setTitle(data.title);  // Or data['title']
            },
            error => console.error(error)
        );

}

Angular 2通过服务更改页面标题

1 个答案: