如何防止 ion-checkbox 选择相同的项目值? [英] How to prevent ion-checkbox from selecting the same item value?
问题描述
这是一个手风琴列表菜单,在菜单的第 3 级,我为每个项目添加了一个复选框.此代码已经从所选项目中获取值,但问题是当我取消我的选择时,它让我得到它的值.如何防止复选框选择相同的项目并在选中时取消?
This is an accordion list menu and at the 3rd level of the menu, I put a checkbox for each item. This code already getting the value from the item selected but the problem is when I cancel my selection it keeps me getting its value. How can I prevent a checkbox from selecting the same item and cancel if it is selected?
form.html
<!-- Third-Level -->
<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' : '' }}
</p>
</ion-label>
<!-- <ion-checkbox item-end (click)="tofix(item)"></ion-checkbox> -->
<ion-checkbox item-end [(ngModel)]="item.open" (click)="tofix(item)"></ion-checkbox>
</ion-item>
form.ts
export class FormPage implements OnInit{
data: any[];
@Input('item') item: any;
constructor(
public navCtrl: NavController,
public navParams: NavParams,
private http: Http,
private toastCtrl: ToastController) {
this.http.get('assets/data/menus.json')
.map(res => res.json().items)
.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() {
}
async tofix(item){
const toast = await this.toastCtrl.create({
message: `Added item to be fix : ${item.name}`,
duration: 2000
});
this.SelectedItemToFix += `${item.name}`;
toast.present();
}
ionViewDidLoad() {
console.log('ionViewDidLoad FormPage');
}
}
推荐答案
您可以访问项目的 open
属性,然后决定显示什么,或者是否显示快餐栏.
You can access the open
attribute of your item and then decide what to display, or if display the snackbar at all.
p>
另外我猜红色按钮的值存储在 SelectedItemToFix
中,所以只有新项目会存储在按钮中.
Also i gues the red button value is stored in SelectedItemToFix
, so only the new item will be stored in the button.
async tofix(item){
this.SelectedItemToFix = item.open ? `${item.name}` : '';
// If you dont want to display the snackbar
// if(!item.open) return;
const toast = await this.toastCtrl.create({
message: `${item.open ? 'Added' : 'Removed'} item ${item.open ? 'to' : 'from'} be fix : ${item.name}`,
duration: 2000
});
toast.present();
}
这篇关于如何防止 ion-checkbox 选择相同的项目值?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!