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我有Directive其中有Subscription调整大小的图表Angular4 ngOnInit rxjs /主题不工作
import {Directive, ElementRef, HostListener, Input, OnDestroy, OnInit} from '@angular/core';
import {Subscription} from 'rxjs/Subscription';
import echarts from 'echarts';
import 'echarts/theme/macarons';
import {ChartService} from '../service/chart/chart.service';
@Directive({selector: '[appECharts]'})
export class EChartsDirective implements OnInit, OnDestroy {
element: ElementRef;
subscription: Subscription;
@Input() eChartsOptions: any;
@Input() theme = 'macarons';
private chart;
constructor(element: ElementRef, private chartsService: ChartService) {
this.element = element;
}
ngOnInit() {
this.subscription = this.chartsService.chartChange.subscribe((str) => {
this.resizeChart(str);
});
this.chart = echarts.init(this.element.nativeElement, this.theme);
if (this.eChartsOptions) {
this.chart.setOption(this.eChartsOptions);
}
}
ngOnDestroy() {
if (this.chart) {
this.chart = null;
}
this.subscription.unsubscribe();
}
resizeChart(str: string) {
console.log('resize from=' + str);
setTimeout(() => {
if (this.chart) {
console.log('resize');
this.chart.resize();
}
}, 500);
}
@HostListener('window:resize')
onResize() {
this.resizeChart('window');
}
}
的ChartService：
import {Injectable} from '@angular/core';
import {Subject} from 'rxjs/Subject';
@Injectable()
export class ChartService {
chartChange = new Subject<string>();
orderChartChanged = new Subject<any[]>();
private orderCharts: any[];
setChartData(orderCharts) {
this.orderCharts = orderCharts;
this.orderChartChanged.next(this.orderCharts);
}
updateCharts(srt: string) {
console.log('from=' + srt);
this.chartChange.next(srt);
}
}
和组件在那里我打电话updateCharts方法
import {Component, ElementRef, OnDestroy, OnInit, ViewChild} from '@angular/core';
import {ChartHttpService} from '../../shared/service/chart/chart-http.service';
import {MdSnackBar} from '@angular/material';
import {Subscription} from 'rxjs/Subscription';
import {ChartService} from '../../shared/service/chart/chart.service';
import echarts from 'echarts';
import 'echarts/theme/macarons';
@Component({
selector: 'app-home',
templateUrl: './home.component.html',
styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnDestroy, OnInit {
chartSubscription: Subscription;
@ViewChild('chart1') element: ElementRef;
chart2;
constructor(private chartService: ChartService,
private chartHttpService: ChartHttpService,
public snackBar: MdSnackBar) {
}
ngOnInit() {
const chart = echarts.init(this.element.nativeElement, 'macarons');
this.chartSubscription = this.chartService.orderChartChanged
.subscribe(
(response: any) => {
const option = response.orderAmount;
chart.setOption(option);
setTimeout(() => {
chart.resize();
}, 500);
this.chart2 = option;
this.chartService.updateCharts('home');
}
);
this.chartHttpService.orderCharts(this.snackBar);
}
ngOnDestroy() {
this.chartSubscription.unsubscribe();
this.chart2 = null;
}
onResize() {
this.chartService.updateCharts('btn');
}
}
ChartHttpService ：
import {Injectable} from '@angular/core';
import {MdSnackBar} from '@angular/material';
import {HttpClient} from '@angular/common/http';
import {TranslateService} from '@ngx-translate/core';
import {Observable} from 'rxjs/Observable';
import 'rxjs/Rx';
import {SnackBarUtils} from '../snack-bar-utils';
import {environment} from '../../../../environments/environment';
import {ChartService} from './chart.service';
@Injectable()
export class ChartHttpService {
private static orderCharts = 'json/chart/ordersChart';
constructor(private http: HttpClient,
private chartService: ChartService,
private translate: TranslateService) {
}
orderCharts(snackBar: MdSnackBar) {
const url = environment.apiUrl + ChartHttpService.orderCharts;
this.http.get(url)
.catch(error => {
return Observable.throw(error);
})
.subscribe(
response => this.chartService.setChartData(response),
error => SnackBarUtils.showLocalizedSnackBar(this.translate, snackBar, 'msg.error')
);
}
}
和HTML组件：
<div class="row">
<div class="col-lg-6 col-md-6 col-xs-12 col-sm-6">
<md-card>
<div class="box-header">Base Line</div>
<div #chart1 style="height: 300px;"></div>
</md-card>
</div>
<div class="col-lg-6 col-md-6 col-xs-12 col-sm-6">
<md-card>
<div class="box-header">Stacked Line</div>
<ng-container *ngIf="chart2">
<div appECharts [eChartsOptions]="chart2" style="height: 300px;"></div>
</ng-container>
</md-card>
</div>
<button (click)="onResize()">Resize</button>
</div>
所以，问题是，当我在浏览器或f5按refresh，updateCharts方法调用中HomeComponent但chartChange主题没有工作我猜的，因为在EChartsDirective订阅没不调用方法resizeChart，并且此问题仅在refresh或f5之后。 如果我点击Resize btn，一切正常。
，所以我不知道为什么，但subscription在EChartsDirectiverefresh或f5后没有援引resizeChart。
任何想法为什么会发生？
UPDATE： 而唯一的问题与chart2，我加chart1，我手动init（无指令）在HomeComponent -> ngOnInit，当我打电话
setTimeout(() => {
chart.resize();
}, 500);
它的工作原理，但只能当然，问题以认购，但仍然）
UPDATE2： 更改为：
ngOnInit() {
this.chart = echarts.init(this.element.nativeElement, this.theme);
if (this.eChartsOptions) {
this.chart.setOption(this.eChartsOptions);
}
this.subscription = this.chartsService.chartChange.subscribe((str) => {
this.resizeChart(str);
});
}
没什么resizeChart改变
登录后，点击后browser refresh或F5
from=home-123
登录到调整BTN
from=xxx chart.service.ts:16
resize from=xxx echarts.directive.ts:37
resize echarts.directive.ts:40
没有帮助，你能举个例子吗？ – user2870934
在resizeChart的控制台中记录什么？它甚至被称为？ – pop
没有来自resizeChart的日志，好吧，我添加this.resizeChart（str）;在EChartsDirective中的ngOnInit方法中，并且在每个图表初始化之后，我都调整了大小，所以它适用于我 – user2870934