Question

我一直在尝试加载本地json数据文件，我将.json文件放在/ src / assets / data中，而我正在使用的提供程序如下：

 function getDataByRegionCode($code, $franchiseArray) {
       foreach ($franchiseArray as $key => $data) {
           if(isset($data[5])){
              $codes = explode(',',$data[5]);
              if(in_array($code,$codes)) return $data;
           }
       }
       return NULL;
    }
    print_r(getDataByRegionCode(14410,$franchiseArray));

在本地浏览器中进行测试时，这确实显示了在android上尝试此操作时加载的正确json数据只返回以下错误文本：

import { Injectable } from '@angular/core'; import { Http, Response } from '@angular/http'; import { Observable } from 'rxjs/Observable'; import 'rxjs/add/operator/map'; import 'rxjs/add/operator/catch'; import 'rxjs/add/observable/from'; import 'rxjs/add/observable/throw'; import { Platform } from 'ionic-angular'; /* Generated class for the JsonProvider provider. See https://angular.io/docs/ts/latest/guide/dependency-injection.html for more info on providers and Angular 2 DI. */ @Injectable() export class JsonProvider { private localApiUrl: string; private remoteApiUrl: string; constructor(public http: Http, private platform: Platform) { //console.log('Hello JsonProvider Provider'); if (this.platform.is('cordova') && this.platform.is('android')) { this.localApiUrl = "file:///android_asset/www/data"; } else { this.localApiUrl = "assets/data"; } } GetLocalData(file: string): Observable<any> { return this.http.get(`${this.localApiUrl}/${file}.json`) .map(this.extractData) .catch(this.handleError); } GetRemoteData(url: string): Observable<string[]> { return this.http.get(`${this.remoteApiUrl}/${url}`) .map(this.extractData) .catch(this.handleError); } GetGareList(): Observable<any> { return this.GetLocalData("gareList"); } GetGara(Id: number): Observable<any> { return this.http.get(`${this.localApiUrl}/gare.json`) .map(res => { let body = res.json(); if (body) { return body.filter(x => { return x.Id == Id })[0]; } else { return {}; } }) .catch(this.handleError); } private extractData(res: Response) { let body = res.json(); return body || {}; } private handleError(error: Response | any) { let errMsg: string; if (error instanceof Response) { const body = error.json() || ''; const err = body.error || JSON.stringify(body); errMsg = `${error.status} - ${error.statusText || ''} ${err}`; } else { errMsg = error.message ? error.message : error.toString(); } console.error(errMsg); return Observable.throw(errMsg); } }

我在没有0 - {"isTrusted":true}部分的情况下也尝试了但仍然无法加载文件。

Answer 1

你应该试试

React doesn't call componentWillReceiveProps with initial props during mounting. It only calls this method if some of component's props may update. Calling this.setState generally doesn't trigger componentWillReceiveProps.

无需检查您所在的平台。

Ionic 3加载本地json文件在android上失败

1 个答案: