ng2-charts - 无法绑定到"数据集",因为它不是"基础图表"的已知属性

Question

版本:Cordova:6.3.1,Gulp CLI:1.2.2,离子框架:2.0.0-rc.0,Ionic CLI版本:2.1.0

---

我在ionic2应用程序中使用ng2-charts.

进口不受import {ChartsModule} from "ng2-charts"; 而是import {ChartsModule} from "ng2-charts/components/charts/charts;"因为这个(问题#440)

我的整个app.module.ts

import { NgModule } from '@angular/core';
import { IonicApp, IonicModule } from 'ionic-angular';
import { ChartsModule } from 'ng2-charts/components/charts/charts';

import { MyApp } from './app.component';
import { EventsPage } from '../pages/events/events.component';
import { ChartComponent } from '../pages/chart/chart.component';
import { APICaller } from '../services/APICaller.service';
import { EventDetailComponent } from '../pages/event-detail/event-detail.component';
import { ParticipantDetail } from '../pages/participant-detail/participant-detail.component';
import { ParticipantFeedComponent } from '../pages/participant-feed/participant-feed.component';



@NgModule({
  declarations: [
    MyApp,
    EventsPage,
    EventDetailComponent,
    ParticipantDetail,
    ParticipantFeedComponent,
    ChartComponent
  ],
  imports: [
    IonicModule.forRoot(MyApp),
    ChartsModule
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    EventsPage,
    EventDetailComponent,
    ParticipantDetail,
    ParticipantFeedComponent,
    ChartComponent
  ],
  providers: [APICaller]
})
export class AppModule { }

ChartComponent:

import { Component, OnInit } from '@angular/core';
@Component({
    selector: 'pie-chart',
    template: `

<base-chart
    class="chart"
    [datasets]="datasets"
    [labels]="labels"
    [options]="options"
    [chartType]="'doughnut'">Titel?
</base-chart>

`
})
export class ChartComponent implements OnInit {
    private datasets = [
        {
            label: "# of Votes",
            data: [12,19,3,5,2,3]
        }
    ];


    private labels = ['Red', 'blue', 'yellow', 'green', 'purple', 'orange'];

    private options = {
        scales: {
            yAxes: [{
                beginAtZero: true
            }]
        }
    };

    constructor() {

    }

    ngOnInit() { }
}

我认为这可能是一个问题Chart.js.我发现chart.js使用npm安装时导致404在我的index.htmlas中引用它node_modules/chart.js/src/chart.js.

所以我下载Chart.bundle.min.js后这个没用,我试着下载Chart.js自己.(放入src/assets/js/...).

在ng2-charts \ng2-charts.js中也解决了这个问题,并没有导出ChartsModule 的评论部分.但由于没有提供答案,这不是根本问题,我发布了这个问题.

错误:(抑制错误消息将无济于事,因为它阻止我的应用程序加载).

polyfills.js:3 Unhandled Promise rejection: Template parse errors:
Can't bind to 'datasets' since it isn't a known property of 'base-chart'.
1. If 'base-chart' is an Angular component and it has 'datasets' input, then verify that it is part of this module.
2. If 'base-chart' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message.
 ("
    class="chart"

    [ERROR ->][datasets]="datasets"

    [labels]="labels"
"): ChartComponent@4:4
Can't bind to 'labels' since it isn't a known property of 'base-chart'.
1. If 'base-chart' is an Angular component and it has 'labels' input, then verify that it is part of this module.
2. If 'base-chart' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message.
 ("
    [datasets]="datasets"

    [ERROR ->][labels]="labels"

    [options]="options"
"): ChartComponent@6:4

Answer 1

我从未使用过这个库，但从最新（1.4.1）版本的源代码来看，它应该用作画布上的属性@Directive({selector: 'canvas[baseChart]'})

<canvas baseChart
   class="chart"
   [data]="datasets"
   [labels]="labels"
   [options]="options"
   [chartType]="'doughnut'">
</canvas>