1
Im学习Angular，我正在创建一个加密货币交换应用。我创建了一个服务和一个接口来从API获取数据。现在我可以将它绑定到DOM，但我也想在我的component.ts中使用这些数据，以便我可以编写例如：Angular 4，打字稿将接口属性分配给变量
Bid2 = Bid * 2;
，然后绑定变量，以这样的DOM：{{标段2}}
感谢您的帮助。这里是我的代码：
Component.ts
import { Component, OnInit } from '@angular/core';
import { Http, Response, Headers } from '@angular/http';
import { BittrexService } from '../../bittrex/bittrex.service';
import {Observable} from "rxjs";
import { MarketListObject } from '../datosmoneda';
import { MarketPrices } from '../datosmoneda';
@Component({
selector: 'app-comprarzec',
templateUrl: './comprarzec.component.html',
styleUrls: ['./comprarzec.component.scss']
})
export class ComprarzecComponent implements OnInit {
private prices = [];
constructor(private bittrexService: BittrexService) {
this.bittrexService = bittrexService;
}
ngOnInit(){
this.bittrexService.getPrices()
.subscribe(
data => this.prices = data.result
);
}
}
Service.ts
import { Injectable } from '@angular/core';
import { Http, Headers, Response } from '@angular/http';
import 'rxjs/add/operator/toPromise';
import {Observable} from "rxjs";
import 'rxjs/Rx';
import 'rxjs/add/operator/catch';
import { MarketViewModel } from '../comprarmonedas/datosmoneda'
@Injectable()
export class BittrexService {
constructor(private http: Http, private marketModel : MarketViewModel) { }
public getPrices() :Observable<MarketViewModel> {
return this.http.get('https://bittrex.com/api/v1.1/public/getmarketsummary?market=btc-zec')
.map((response: Response) => response.json());
}
}
interface.ts（datosmoneda.ts）;
export class MarketViewModel {
public success : boolean;
public message : string;
public result : MarketListObject[];
}
export class MarketListObject {
public MarketName : string;
public High : number;
public Low : number;
public Volume : number;
public Last : number;
public BaseVolume : number;
public TimeStamp : number;
public Bid : number;
public Ask : number;
public OpenBuyOrders : number;
public OpenSellOrders : number;
public PrevDay : number;
public Created : number;
}
再次感谢您的帮助！
制作ComprarzecComponent的公共属性，并将其称为Bid2。该模板应该能够绑定到它。当您更改该值时，模板应该注意。 –
在插值中，您也可以进行数学运算：{{Bid * 2}} –