极客教程Ember.js EmberRouter init() 方法
Ember.js 是一个基于模型-视图-控制器（MVC）架构用于开发大型客户端网页应用程序的开源JavaScript框架。Ember.js是最广泛使用的前端应用程序框架之一。它旨在加快开发速度和提高生产力。目前，它被许多网站使用，包括Square、Discourse、Groupon、Linked In、Live Nation、Twitch和Chipotle。
init() 是在对象实例化时调用的方法。 默认情况下，此方法不执行任何操作，我们必须重写此方法以适应我们的需求。
语法:
init(){
// Method algorithm
};
安装和运行Ember.js的步骤：
步骤1： 要运行以下示例，您需要拥有一个Ember项目。要创建一个项目，您首先需要安装ember-cli。在终端中输入以下代码:
npm install ember-cli
步骤2： 现在您可以通过键入以下代码来创建项目：
ember new <project-name> --lang en
启动服务器，请键入：
ember serve
示例1： 输入以下代码以生成此示例的路线：
ember generate route init1
app/routes/init1.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);
}
}
app/controllers/init1.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);
}
},
});
app/templates/init1.hbs
{{page-title "Init"}}
<h3>Fruit's List :</h3>
<table>
<tr>
<th>Name</th>
<th>Fruit</th>
<th>Color</th>
</tr>
{{#each this.fruits as |detail|}}
<tr>
<td>{{detail.name}}</td>
<td>{{detail.isFruit}}</td>
<td>{{detail.color}}</td>
</tr>
{{/each}}
</table>
<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：
示例2： 输入以下代码以生成此示例的路由：
ember generate route init2
app/routes/init2.hbs
import Route from '@ember/routing/route';
import Ember from 'ember';
let Student = Ember.Object.extend({
// these will be supplied by `create`
firstName: null,
lastName: null,
init() {
alert(`{this.get('firstName')} is Listed`);
},
fullName: Ember.computed('firstName', 'lastName', function () {
return `{this.firstName} ${this.lastName}`;
}),
});
export default class PartyRoute extends Route {
students = [
Student.create({
firstName: 'Balit',
lastName: 'stark',
Id: 'stu2',
}),
Student.create({
firstName: 'Permu',
lastName: 'scott',
Id: 'stu0',
}),
Student.create({
firstName: 'Sam',
lastName: 'melo',
Id: 'stu1',
}),
Student.create({
firstName: 'Pokhu',
lastName: 'Verma',
Id: 'stu3',
}),
Student.create({
firstName: 'Tanu',
lastName: 'Agrawal',
Id: 'stu4',
}),
Student.create({
firstName: 'Arabh',
lastName: 'Singh',
Id: 'stu5',
})];
item3 = 'Gulshan';
item2 = 'Verma';
item1 = 'stu6';
model() {
return this.person;
}
setupController(controller, model) {
super.setupController(controller, model);
controller.set('students', this.students);
controller.set('item1', this.item1);
controller.set('item2', this.item2);
controller.set('item3', this.item3);
}
}
app/controllers/init2.js
import Controller from '@ember/controller';
import { action, find } from '@ember/object';
import Ember from 'ember';
let Student = Ember.Object.extend({
// these will be supplied by `create`
firstName: null,
lastName: null,
init() {
alert(`{this.get('firstName')} is Listed`);
},
fullName: Ember.computed('firstName', 'lastName', function () {
return `{this.firstName} {this.lastName}`;
}),
Changed: Ember.observer('fullName', function () {
console.log(`fullName changed to:{this.fullName}`);
}),
});
export default class Array2Controller extends Controller {
@action
print(data1, data2, data3) {
let temp = Student.create({
firstName: data1,
lastName: data2,
Id: data3
});
this.students.addObject(temp);
}
}
app/templates/init2.hbs
<h3>Student's List :</h3>
<table>
<tr>
<th>Name</th>
<th>Id</th>
</tr>
{{#each this.students as |detail|}}
<tr>
<td>{{detail.fullName}}</td>
<td>{{get detail "Id"}}</td>
</tr>
{{/each}}
</table>
<br />
<div>
<label>Enter Student FirstName: </label>
{{input value=this.item3}}
</div>
<br />
<div>
<label>Enter Student LastName: </label>
{{input value=this.item2}}
</div>
<br />
<div>
<label>Enter Student Id: </label>
{{input value=this.item1}}
</div>
<br />
<input
type="button"
id="set-code"
value="Update Student details"
{{action "print" this.item3 this.item2 this.item1}}
/>
输出：
参考： https://api.emberjs.com/ember/4.6/classes/EmberRouter/methods/init?anchor=init