如何单独增加计数?
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【中文标题】如何单独增加计数?【英文标题】:How to increase the count individually? 【发布时间】:2019-05-21 20:04:40 【问题描述】:在我的项目中,有不同的人参加选举,因此希望单独增加投票的计数。但是,每当我点击一张卡片时,所有剩余的卡片都会自动增加。请任何人提出建议。
我正在使用 AngularJs 7。 以下是component.html文件
<mat-card-actions>
<button mat-mini-fab color="primary"
(click)="supportButtonclick()" color="accent" ><mat-icon>thumb_up</mat-
icon></button>
<button mat-mini-fab color="accent"
(click)="unsupportButtonclick()" color="decent" ><mat-
icon>thumb_down</mat-icon></button>
<div fxFlex.gt-sm="33.33%" class="card-text">
numberofSupport </div>
<button mat-button><mat-icon>share</mat-icon></button>
</mat-card-actions>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.0/angular.min.js">
</script>
@Component(
selector: 'app-dashboard2',
templateUrl: './dashboard2.component.html',
styleUrls: ['./dashboard2.component.scss']
)
export class Dashboard2Component implements OnInit
numberofSupport: number=0;
supportButtonclick()
this.numberofSupport++;
unsupportButtonclick()
this.numberofSupport--;
<mat-card-actions><button mat-mini-fab color="primary"
(click)="supportButtonclick()" color="accent" ><mat-icon>thumb_up</mat-
icon></button><button mat-mini-fab color="accent"
(click)="unsupportButtonclick()" color="decent" ><mat-
icon>thumb_down</mat-icon></button>
<div fxFlex.gt-sm="33.33%" class="card-text"> numberofSupport </div>
<button mat-button><mat-icon>share</mat-icon></button>
</mat-card-actions>
Following is the component.ts file
@Component(
selector: 'app-dashboard2',
templateUrl: './dashboard2.component.html',
styleUrls: ['./dashboard2.component.scss']
)
export class Dashboard2Component implements OnInit
numberofSupport: number=0;
supportButtonclick()
this.numberofSupport++;
unsupportButtonclick()
this.numberofSupport--;
My expected result is to show the individual count of individual
candidate, when a button is clicked
【问题讨论】:
【参考方案1】:使用unique
属性(即使是自定义属性)来执行此操作。
(我对这个例子进行了过度简化,以便您更好地理解)。
listOfCard = [
id: 0,
name: "card 1",
count: 0
,
id: 1,
name: "card 2",
count: 0
,
id: 2,
name: "card 3",
count: 0
,
id: 3,
name: "card 5",
count: 0
,
]
public addCount(id)
let idx= this.listOfCard.findIndex(el => el.id == id);
this.listOfCard[idx].count++;
public decreaseCount(id)
let idx= this.listOfCard.findIndex(el => el.id == id);
this.listOfCard[idx].count--;
简单的html:
<div class="fl" *ngFor="let card of listOfCard">
<span style="margin-right: 10px">card.name</span>
Count: <span style="margin-right: 10px">card.count</span>
<button (click)="addCount(card.id)">Add</button>
<button (click)="decreaseCount(card.id)">decrease</button>
</div>
.fl
display: flex;
flex-direction: row;
Stackbtliz : https://stackblitz.com/edit/angular-uckb2t
【讨论】:
谢谢 Jacopo Sciampi 先生。这解决了我的问题。 完美。如果您认为这正是您所需要的,您可以接受这个答案。圣诞快乐。 也祝你圣诞快乐。以上是关于如何单独增加计数?的主要内容,如果未能解决你的问题,请参考以下文章