ionicでfirebaseへ画像アップロードできるように

前提

• ionic環境準備とプロジェクトを作成
• https://qiita.com/alingogo/items/fc5eece405cdc6ffc025
• Firebase configとアプリ設定、モジュールのインストール、config内容を導入を以下の文書を参照してください
• https://qiita.com/alingogo/items/a049a73f1ec20a243573

native plugin導入

$ ionic cordova plugin add https://github.com/apache/cordova-plugin-camera.git

firebase storageのルールを変更

• 開発 -> storage -> ルール

service firebase.storage {
  match /b/<appname>.appspot.com/o {
    match /{allPaths=**} {
      allow read, write;
    }
  }
}

実装

• アップロードページを作成

$ ionic g page image_upload

• html

image_upload.html

<ion-content padding>
  <div style="justify-content:center">
    <button ion-button (click)="capture()">写真を撮る</button>
  </div>
  <img [src]="captureDataUrl"  *ngIf="captureDataUrl"/>
  <button ion-button (click)="upload()" *ngIf="captureDataUrl">アップロード</button>
</ion-content>

• ロジック

image_upload.ts

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { Camera, CameraOptions } from '@ionic-native/camera';
import firebase from 'firebase';

@IonicPage()
@Component({
  selector: 'page-image-upload',
  templateUrl: 'image-upload.html',
})
export class ImageUploadPage {
  captureDataUrl: string;

  constructor(private camera: Camera) {
  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad ImageUploadPage');
  }



  capture() {
    const cameraOptions: CameraOptions = {
      quality: 50,
      destinationType: this.camera.DestinationType.DATA_URL,
      encodingType: this.camera.EncodingType.JPEG,
      mediaType: this.camera.MediaType.PICTURE,
    };

    this.camera.getPicture(cameraOptions).then((iData) => {
      this.captureDataUrl = 'data:image/jpeg;base64,' + iData;
    }, (err) => {
      console.log('error');
    });
  }

  upload() {
    let sRef = firebase.storage().ref();
    const filename = Math.floor(Date.now() / 1000);
    const imageRef = sRef.child(`images/${filename}.jpg`);

    imageRef.putString(this.captureDataUrl, firebase.storage.StringFormat.DATA_URL).then((snapshot)=> {
      console.log('upload succes');
    });
  }
}