Embeer.js ArrayProxy init()用法及代码示例

Ember.js 是一个开源 JavaScript 框架，用于开发基于 Model-View-Controller (MVC) 架构的大型客户端 Web 应用程序。 Ember.js是使用最广泛的前端应用框架之一。它的目的是加速开发并提高生产力。目前，它被大量网站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

实例化对象时会调用init()方法。

用法:

init(){
// method algorithm 
};

要运行以下示例，您需要有一个 ember 项目。要创建一个，您需要先安装ember-cli。在终端中写入以下代码：

npm install ember-cli

现在您可以通过输入以下代码来创建项目：

ember new <project-name> --lang en

要启动服务器，请键入：

ember serve

示例 1：键入以下代码以生成本示例的路由：

ember generate route insertAt1

应用程序/路线/init1.js


import Route from '@ember/routing/route'; 
export default class FruitsRoute extends Route { 
    fruits = [ 
        { 
            'name': 'Lady Finger', 
            'isFruit': false, 
            'color': 'green', 
            'quant': 2, 
        }, 
        { 
            'name': 'Brinjal', 
            'isFruit': false, 
            'color': 'purple', 
            'quant': 2, 
        }, 
        { 
            'name': 'Apple', 
            'isFruit': true, 
            'color': 'red', 
            'quant': 5, 
        }, 
        { 
            'name': 'Grapes', 
            'isFruit': true, 
            'color': 'green', 
            'quant': 4, 
        }, 
        { 
            'name': 'Mango', 
            'isFruit': true, 
            'color': 'yellow', 
            'quant': 3, 
        }, 
        { 
            'name': 'Watermelon', 
            'isFruit': true, 
            'color': 'red', 
            'quant': 2, 
        }, 
        { 
            'name': 'Orange', 
            'isFruit': true, 
            'color': 'orange', 
            'quant': 2, 
        } 
    ]; 
    item2; 
    item3; 
    init() { 
        this._super(...arguments); 
        alert("this is initalier"); 
    } 
    model() { 
        return this.fruits; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('fruits', this.fruits); 
        controller.set('item1', this.item1); 
        controller.set('item2', this.item2); 
        controller.set('item3', this.item3); 
    } 
}

应用程序/控制器/init1.js


import Ember from "ember"; 
  
export default Ember.Controller.extend({ 
    age: 55, 
    actions: { 
        print_Color() { 
            let temp = ''; 
            let foo = this.fruits.getEach('name'); 
            let too = this.fruits.getEach('color'); 
            for (let i = 0; i < foo.length; i++) 
                temp += foo[i] + '\n'; 
            alert(temp ? temp : 'No item in list') 
        }, 
        remove() { 
            this.fruits.clear(); 
  
        }, 
    }, 
});

应用程序/模板/init1.hbs


{{page-title "Init"}} 
<h3>Here is a list of eatables: </h3> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Fruit</th> 
        <th>Color</th> 
        <th>Quantity</th> 
    </tr> 
    {{#each @model as |detail|}} 
        <tr> 
            <td>{{detail.name}}</td> 
            <td>{{detail.isFruit}}</td> 
            <td>{{detail.color}}</td> 
            <td>{{detail.quant}}</td> 
        </tr> 
    {{/each}} 
</table> 
<br /><br /> 
  
<div> 
    <input 
        type="button"
        id="addFruit"
        value="Find All the Colors of Fruit"
        {{action "print_Color"}} 
    /> 
</div> 
<br /> 
<div> 
    <input type="button" id="removeFruit" 
    value="Clear" {{action "remove"}} /> 
</div> 
{{outlet}}

输出：访问 localhost:4200/init1 查看输出

Ember.js ArrayProxy 初始化方法

示例 2：键入以下代码以生成本示例的路由：

ember generate route init2

应用程序/路线/init2.js


import Route from '@ember/routing/route'; 
  
export default class FruitsRoute extends Route { 
    fruits = [ 
        { 
            'name': 'Lady Finger', 
            'isFruit': false, 
            'color': 'green'
        }, 
        { 
            'name': 'Brinjal', 
            'isFruit': false, 
            'color': 'purple'
        }, 
        { 
            'name': 'Apple', 
            'isFruit': true, 
            'color': 'red'
        }, 
        { 
            'name': 'Grapes', 
            'isFruit': true, 
            'color': 'green'
        }, 
        { 
            'name': 'Mango', 
            'isFruit': true, 
            'color': 'yellow'
        }, 
        { 
            'name': 'Watermelon', 
            'isFruit': true, 
            'color': 'red'
        }, 
        { 
            'name': 'Orange', 
            'isFruit': true, 
            'color': 'orange'
        } 
    ]; 
    item2; 
    item3; 
      
    model() { 
        return this.fruits; 
    } 
    setupController(controller,model) { 
        super.setupController(controller, model); 
        controller.set('fruits', this.fruits); 
        controller.set('item1', this.item1); 
        controller.set('item2', this.item2); 
        controller.set('item3', this.item3); 
    } 
}

应用程序/控制器/init2.js


import Ember from "ember"; 
import { addObject, isAny, isEvery } from "@ember/array"; 
import EmberObject from '@ember/object'; 
  
const Fruit = EmberObject.extend({ 
    init() { 
        alert(`Name is ${this.get('name')}`); 
    } 
}); 
export default Ember.Controller.extend({ 
    actions: { 
        print_Color() { 
            let temp = ''; 
            this.fruits.forEach((item) => temp += `${item.name} is  
            ${item.color} color` + '\n'); 
            alert(temp ? temp : 'No item in list') 
        }, 
        remove() { 
            this.fruits.clear(); 
  
        }, 
        insertItem(data, data1, data2) { 
            let temp = Fruit.create({ 
                name: data, 
                isFruit: data1, 
                color: data2 
            }); 
            this.fruits.addObject(temp); 
        } 
    }, 
});

应用程序/模板/init2.hbs


{{page-title "Init"}} 
<h3>Here is a list of eatables: </h3> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Fruit</th> 
        <th>Color</th> 
    </tr> 
    {{#each @model as |detail|}} 
        <tr> 
            <td>{{detail.name}}</td> 
            <td>{{detail.isFruit}}</td> 
            <td>{{detail.color}}</td> 
        </tr> 
    {{/each}} 
</table> 
<br /><br /> 
  
<div> 
    <input 
        type="button"
        id="addFruit"
        value="Find All the Colors of Fruit"
        {{action "print_Color"}} 
    /> 
</div> 
<br /><br /> 
<div> 
    <label>Enter Fruit Name: </label> 
    {{input value=this.item1}} 
</div><br /> 
<div> 
    <label>Item is Fruit: </label> 
    {{input value=this.item2}} 
</div><br /> 
<div> 
    <label>Enter Fruit color: </label> 
    {{input value=this.item3}} 
</div><br /> 
<div> 
    <input 
        type="button"
        id="insert-item"
        value="Insert Fruit"
        {{action "insertItem" this.item1 this.item2 this.item3}} 
    /> 
</div> 
{{outlet}}

输出：访问 localhost:4200/init2 查看输出

Ember.js ArrayProxy 初始化方法

参考：https://api.emberjs.com/ember/4.6/classes/ArrayProxy/methods/invoke?anchor=init

相关用法

注：本文由纯净天空筛选整理自satyam00so大神的英文原创作品 Ember.js ArrayProxy init() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。