Question

我正在尝试实施https://ionicframework.com/docs/native/file-transfer/

因此我需要安装https://ionicframework.com/docs/native/file/

当我在我的服务中使用“文件”时，我收到错误：

无法解析文件的所有参数:(？，？，？，？，？）。

我知道问号可能类似于循环引用，我从未在其他地方使用过我的服务，也没有使用过“文件”。

import {Injectable} from '@angular/core';
import {File} from "@ionic-native/file";
import { FileTransfer, FileTransferObject } from '@ionic-native/file-transfer';

@Injectable()
export class ImageService {

  constructor(private file: File, private transfer: FileTransfer) {

  }

  public getImagesOfSchedule() {
    const fileTransfer: FileTransferObject = this.transfer.create();
    const url = 'http://techbooster.be/wp-content/uploads/2017/11/logo-long-white.png';
    fileTransfer.download(url, this.file.dataDirectory + 'file.pdf').then((entry) => {
      console.log('download complete: ' + entry.toURL());
    }, (error) => {
      // handle error
    });
  }

}

app.module.ts

providers: [
    StatusBar,
    AuthenticationService,
    ScheduleService,
    ToastService,
    StorageService,
    FacebookService,
    GoogleService,
    ImageService,
    Facebook,
    GooglePlus,
    PushService,
    File, <----------------
    FileTransfer, <--------------
    Push,
    ScreenOrientation,
    {
      provide: HttpService,
      useFactory: HttpFactory,
      deps: [XHRBackend, RequestOptions]
    },
    {
      provide: HttpNoAuthService,
      useFactory: HttpFactory,
      deps: [XHRBackend, RequestOptions]
    },
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}

Answer 1

好的，我发现在app.module.ts中自动导入的File类不是：

Bundler could not find compatible versions for gem "actionpack":
  In Gemfile:
    active_link_to was resolved to 1.0.3, which depends on
      actionpack

    active_model_serializers was resolved to 0.10.2, which depends on
      actionpack (< 6, >= 4.1)

    inherited_resources was resolved to 1.6.0, which depends on
      actionpack (< 5, >= 3.2)

    inherited_resources was resolved to 1.6.0, which depends on
      actionpack (< 5, >= 3.2)

    kaminari was resolved to 0.17.0, which depends on
      actionpack (>= 3.0.0)

    rails (= 5.0.0) was resolved to 5.0.0, which depends on
      actionpack (= 5.0.0)

    rails (= 5.0.0) was resolved to 5.0.0, which depends on
      actionpack (= 5.0.0)

    rspec-rails (= 3.6.0) was resolved to 3.6.0, which depends on
      actionpack (>= 3.0)

而是自动导入了一些标准的“lib.es6.d.ts”。

因此，请确保导入正确的“文件”类！

无法解析File的所有参数

1 个答案: