将其变量设置为 true 或 false 时如何防止复选框全部选中？

Question

我制作了一个 accordion list with ionic [v3] 正如您在 link 视频教程中看到的那样 select 选项菜单不在 .html 文件中。菜单中的列表项来自 .json 文件，您可以在我的 .ts 文件中看到

form.html

    .....
    <ion-item *ngFor="let item of child.children" detail-none class="child-item" text-wrap no-lines>
         <ion-label>{{ item.name }} <p style="color: #0077ff;">{{ selected }}</p> </ion-label>
         <ion-checkbox item-end [(ngModel)]="value" (click)="tofix(item)"></ion-checkbox>
    </ion-item>
    .....

form.ts

    export class FormPage  implements OnInit{
      data: any[];

      public SelectedItemToFix: string = '';

      @Input('item') item: any;

      constructor(public navCtrl: NavController, 
                  public navParams: NavParams, 
                  private http: Http,
                  private toastCtrl: ToastController) {
                    let localData = this.http.get('assets/data/menus.json').map(res => res.json().items);
                      localData.subscribe(data => {
                        this.data = data;
                      });
                      this.title = navParams.get('title');
                      this.subtitle = navParams.get('subtitle');
                  }

      toggleSection(i) {
        this.data[i].open = !this.data[i].open;
      }

      toggleItem(i, j) {
        this.data[i].children[j].open = !this.data[i].children[j].open;
      }

      ngOnInit() {
      }

    value = false;
    public selected: string = '';

        async tofix(item){
          let toast = await this.toastCtrl.create({
            message: `Added item to be fix : ${item.name}`,
            duration: 2000
          }); 
          console.log(this.value);
          this.SelectedItemToFix += `${item.name}`;
          if(this.value == true){
            this.selected = "Item Selected"
          }
          else{
            this.selected = "Cancelled"
          }
          toast.present();
        }

Answer 1

您正在对相同的所有复选框进行 ngModel value。

要修复它，您可以在对象上使用 open 属性：this.data[i].children[j].open。

您也可以删除 public selected: string = ''; 并在项目本身中执行此操作，否则您会遇到与值相同的问题。

.....
<ion-item *ngFor="let item of child.children" detail-none class="child-item" text-wrap no-lines>
     <ion-label>
          {{ item.name }} 
          <p style="color: #0077ff;">
              {{ item.open ? 'Item Selected' : 'Cancelled'}}
          </p> 
     </ion-label>
     <ion-checkbox item-end [(ngModel)]="item.open" (click)="tofix(item)"></ion-checkbox>
</ion-item>
.....

将其变量设置为 true 或 false 时如何防止复选框全部选中？

How to prevent checkbox from selecting all when setting its variable to true or false?

ionic3

angular