在Angular 2中调用click事件上的函数

问题描述

如何在组件（typescript）中声明一个函数并在Angular 2中的click事件中调用它？
以下是Angular 1中相同功能的代码，我需要Angular 2代码：

How to declare a function inside a component (typescript) and call it on a click event in Angular 2?Following is the code for the same functionality in Angular 1 for which I require Angular 2 code:

<button ng-click="myFunc()"></button>

// controller

//controller

app.controller('myCtrl', ['$scope', function($cope) {
    $scope.myFunc= {
        console.log("function called");
    };
}]);

推荐答案

组件代码：

import { Component } from "@angular/core";

@Component({
  templateUrl:"home.html"
})
export class HomePage {

  public items: Array<string>;

  constructor() {
    this.items = ["item1", "item2", "item3"]
  }

  public open(event, item) {
    alert('Open ' + item);
  }

}

查看：

<ion-header>
  <ion-navbar primary>
    <ion-title>
      <span>My App</span>
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content>
  <ion-list>
    <ion-item *ngFor="let item of items" (click)="open($event, item)">
      {{ item }}
    </ion-item>
  </ion-list>
</ion-content>

正如您在代码中看到的那样，我正在声明像这样的点击处理程序（click）=open（$ event，item）并发送事件和项目（在 * ngFor 中声明）到 open（）方法（在组件代码中声明）。

As you can see in the code, I'm declaring the click handler like this (click)="open($event, item)" and sending both the event and the item (declared in the *ngFor) to the open() method (declared in the component code).

如果您只是想显示该项目而您不需要从该事件中获取信息，您只需（点击）= open（item）并修改 open 方法，例如 public open（item）{...}

If you just want to show the item and you don't need to get info from the event, you can just do (click)="open(item)" and modify the open method like this public open(item) { ... }

这篇关于在Angular 2中调用click事件上的函数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！