角2，离子。无法解析主页的所有参数

Question

我在下面缺少什么？我正在尝试将Cordova-camera-plugins和ionic native与Ionic 2配合使用，但是在ionic服务后收到以下运行时错误：“无法解析HomePage的所有参数：（[[object Object]，[object Object]， [对象对象]，[对象对象] 、？）。”

Home.ts

import { Component, Injectable } from '@angular/core';
import { NavController } from 'ionic-angular';
import { ToastController } from 'ionic-angular';
// import { File } from '@ionic-native/file';
import { Diagnostic } from '@ionic-native/diagnostic';
import { CameraPreview, CameraPreviewOptions, CameraPreviewDimensions} from '@ionic-native/camera-preview';
declare var cordova: any;

@Component({
  selector: 'page-home',
  templateUrl: 'home.html',

})

@Injectable()
export class HomePage {

  constructor(
    private navCtrl: NavController,
    private toastCtrl: ToastController,
    // public file:File,
    public diagnostic:Diagnostic,
    public cameraPreview: CameraPreview,
    public previewRect: CameraPreviewOptions
  ) {  this.checkPermissions(); }

app.module.ts

import { NgModule, ErrorHandler } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';


import { HomePage } from '../pages/home/home';
import { Diagnostic } from '@ionic-native/diagnostic';


import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

@NgModule({
  declarations: [
    MyApp,
    HomePage,
  ],
  imports: [
     BrowserModule,
     IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
    entryComponents: [
     MyApp,
     HomePage,
     Diagnostic
  ],
  providers: [
    StatusBar,
    SplashScreen,
    Diagnostic,
    {provide: ErrorHandler, useClass: IonicErrorHandler},
    {provide: Diagnostic, useClass: Diagnostic}
   ]
})
export class AppModule {}

Answer 1

我曾经遇到过同样的错误，现在已经修复了。“无法解析主页的所有参数：（[object Object]、[object Object]、[object Object]、[object Object]，？）。”。

这 ”？” 可能意味着无法识别或其他什么，所以尝试删除构造函数中的一些参数并将它们声明为普通数据成员（在构造函数之上）。例如，“公共预览矩形：CameraPreviewOptions”。