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离子2 - 设定模型驱动形式的值

当我加载这个时,我想要将以前保存的值从本地存储器归因于此表单时,我会遇到与Ionic 2中内置的模型驱动表单相关的内容.

我设法使用Ionic的存储服务保存它,但是我没有将这些保存的数据归因于表单.我收到以下错误:

TypeError:设置只有getter的属性

这是我的代码,到目前为止:

import { Component } from '@angular/core';
import { Validators, FormBuilder, FormGroup } from '@angular/forms';
import { NavController, NavParams } from 'ionic-angular';
import { Storage } from '@ionic/storage';

@Component({
  selector: 'page-survey',
  templateUrl: 'survey.html',
  providers: [Storage]
})

export class Survey {
  form: FormGroup;
  networkStatus: boolean = true;

  constructor(public navCtrl: NavController, public navParams: NavParams,
              public formBuilder: FormBuilder, private storage: Storage) {

    // localstorage 
    this.storage = storage;

    this.form = formBuilder.group({
      "isPropertyOwner": ["", Validators.required],
      "familyMembers": ["", Validators.compose([Validators.required, Validators.minLength(0)])],
      "ownsProperty": ["", …
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local-storage ionic2 angular2-forms angular

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