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如何在角度5的循環中選擇dom元素

[英]How to select dom element in a loop in angular 5

我是新手,並且每天都在學習它。 我正在用角度5作曲,結果進展順利。 我只是陷入一個小問題,我可以使用jquery解決這個問題,但是我想以有角度的方式解決它。

這是我的粗魯

在此處輸入圖片說明

默認情況下,輸入框是禁用的,我想要的是,當我單擊“編輯”時,它應該啟用,而我只需要啟用相鄰輸入而不是全部。

到目前為止,這是我嘗試過的。

home.component.html

<div class="container color-dark">
  <div class="col">
    <p>Add a bucket list item</p>
  </div>
  <div class="col">
    <p>Your bucket list ({{itemscount}})</p>
  </div>
</div>
<div class="container color-light">
  <div class="col">
    <p class="sm">Use this form below to add a new bucket list goal. What do you want to accomplish in your life?</p>

    <form>
      <input type="text" class="txt" name="item" placeholder="{{goalText}}" [(ngModel)]="goalText">
      <br><span>{{ goalText }}</span><br>
      <input type="submit" class="btn" [value]="btnText" (click)="additem()">
    </form>
  </div>
  <div class="col">
    <p class="life-container" *ngFor = "let goal of goals; let i = index" >
      <input type="text"  value=" {{ goal }}" [disabled]="editable" #goalInput>
      <span class="edit_btn" (click)="edititem(i)">{{edit_btn_txt}}</span>
      <span class="delete_btn" (click)="removeitem(i)">Delete</span>
    </p>
  </div>
</div>

這是我的打字稿文件代碼

import { Component, ViewChild, AfterViewInit, ElementRef, OnInit } from '@angular/core';

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent implements OnInit {

    itemscount:Number = 0;
    btnText:string="Add an Item";
    goalText:string = "";
    goals = ['My First Goal'];
    editable:Boolean = true;
    edit_btn_txt:string = "Edit";
    constructor() { }

    ngOnInit() {

    }

    @ViewChild('goalInput') pizzaInput: ElementRef;

    additem(){
        this.goals.push(this.goalText);
        this.goalText='';
        this.itemscount = this.goals.length;
    }


    ngAfterViewInit() {
        //console.log(this.extraIngredient); // tomato

    }
    edititem(i){
        this.pizzaInput.nativeElement.disabled = false;
    }

    removeitem(i){
        this.goals.splice(i,1);
        this.itemscount = this.goals.length;
    }
}

當我單擊“編輯”按鈕時,第一個框已啟用寫入功能,但它已經工作了一段時間。 它不適用於其他盒子。 我該如何處理?

提前致謝。

這是使用ViewChildren的另一種解決方案:

@ViewChildren('goalInput') pizzaInput;

edititem(i){
     this.pizzaInput.toArray()[i].nativeElement.disabled = false;
}

嘗試這個

<p class="life-container" *ngFor = "let goal of goals; let i = index" >
  <input type="text"  value=" {{ goal }}" [disabled]="i != selectedIndex" #goalInput>
  <span class="edit_btn" (click)="edititem(i)">{{edit_btn_txt}}</span>
  <span class="delete_btn" (click)="removeitem(i)">Delete</span>
</p>

並在您的component.ts中添加此

selectedIndex: number;
 constructor() { 
    this.selectedIndex = -1;
 }


edititem(i){
    this.selectedIndex = i;
}

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