我正在尝试处理需要在其中添加一些动态字段的表单。
我将这些动态条目存储在数组中。问题是当我用Ng-Model绑定输入字段时,它一次只能输入一个字符。
即如果我尝试输入例如'test',我只能输入't',输入下一个字符,我必须再次单击输入字段,然后输入下一个字符。没有ngModel,事情就可以正常工作,但是我需要使用ngModel才能使我的场景正常工作。下面是代码:
HTML:
<form #personalForm="ngForm" class="editForm" novalidate>
<tbody>
<tr *ngFor="let value of personal.array; let i = index">
<td>
<div class="input-group">
<div class="input-group-prepend">
<div (click)="deleteFieldValue(i)" class="input-group-text"><i class="mdi mdi-close mdi-18px"></i></div>
</div>
<input type="text" class="form-control input-md" [(ngModel)]="personal.array[i]" name="{{[i]}}" placeholder="item name">
</div>
</td>
</tr>
<tr>
<td align="right">
<button class="btn btn-success btn-sm" type="button" (click)="addFieldValue()" style="margin-right:10px">Add More Item</button>
<button (click)="onEditCloseItems()" class="btn btn-primary btn-sm" type="button">Save Items</button>
</td>
</tr>
</tbody>
</form>
TypeScript:
import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';
import { FormGroup, FormControl, FormArray, Validators } from '@angular/forms';
import { Personal } from '../data/formData.model';
import { FormDataService } from '../data/formData.service';
@Component({
selector: 'app-personal',
templateUrl: './personal.component.html'
})
export class PersonalComponent implements OnInit {
personal: Personal;
form: any;
newAttribute = '';
isEditItems: boolean;
constructor(private router: Router, private formDataService: FormDataService) { }
ngOnInit() {
this.personal = this.formDataService.getPersonal();
console.log('Personal feature loaded!');
}
save(form: any): boolean {
if (!form.valid) {
return false;
}
this.formDataService.setPersonal(this.personal);
return true;
}
goToNext(form: any) {
if (this.save(form)) {
// Navigate to the work page
this.router.navigate(['/work']);
}
}
addFieldValue() {
if (this.personal.array.length <= 8) {
this.personal.array.push(this.newAttribute);
} else {
}
}
deleteFieldValue(index) {
this.personal.array.splice(index, 1);
}
onEditCloseItems() {
this.isEditItems = !this.isEditItems;
}
}
formModel.ts文件:
export class Personal {
firstName: string = '';
lastName: string = '';
email: string = '';
array: string[] = [];
}
这里的问题是在数组的动态输入文本字段中,我只能在那些字段中输入单个字母。要输入下一个字母,我必须再次单击输入字段,任何人都可以解释为什么会发生这种情况并提供解决方案。
谢谢
答案 0 :(得分:2)
将trackBy
添加到HTML:
<tr *ngFor="let value of personal.array; let i = index; trackBy: trackByFn">
添加到您的TypeScript:
trackByFn(index: any, item: any) {
return index;
}