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AngularJS学习--- 事件处理(Event Handlers) ng-click操作 step 10

2014-05-15 00:42 447 查看
本文主要通过介绍ng-click方法来对angularjs中的事件处理方法做个了解.

1.切换目录

git checkout step-10
npm start


2.效果

点击右边的小图片,那么左边框中将显示大图片,示例如下:





3.代码实现

查看step-9和step-10之间的代码差异:https://github.com/angular/angular-phonecat/compare/step-9...step-10

Controllers(控制器)

app/js/controllers.js
:


'use strict';

/* Controllers */

var phonecatControllers = angular.module('phonecatControllers', []);

phonecatControllers.controller('PhoneListCtrl', ['$scope', '$http',
function($scope, $http) {
$http.get('phones/phones.json').success(function(data) {
$scope.phones = data;
});

$scope.orderProp = 'age';
}]);

phonecatControllers.controller('PhoneDetailCtrl', ['$scope', '$routeParams', '$http',
function($scope, $routeParams, $http) {
$http.get('phones/' + $routeParams.phoneId + '.json').success(function(data) {
$scope.phone = data;
$scope.mainImageUrl = data.images[0];
});

$scope.setImage = function(imageUrl) {
$scope.mainImageUrl = imageUrl;
}
}]);


注:控制器这里定义了一个setImage方法,就是将mainImageUrl的值设置为当前imageUrl.

CSS(样式)

app/css/app.css

ul.phone-thumbs img:hover {
cursor: pointer;
}


改变鼠标移动上去的样式为指针形.

Template(模板)

app/partials/phone-detail.html

<img ng-src="{{mainImageUrl}}" class="phone">

...

<ul class="phone-thumbs">
<li ng-repeat="img in phone.images">
<img ng-src="{{img}}" ng-click="setImage(img)">
</li>
</ul>
...


这里定义了一个ng-click方法,这里将当前的img作为参数传过去,然后,setImage方法将mainImageUrl的值替换为当前点击的图片,从而实现点击小图片,左边的图片被放大.

4.测试:

test/e2e/scenarios.js


...
describe('Phone detail view', function() {

...

it('should display the first phone image as the main phone image', function() {
expect(element(by.css('img.phone')).getAttribute('src')).toMatch(/img\/phones\/nexus-s.0.jpg/);
});

it('should swap main image if a thumbnail image is clicked on', function() {
element(by.css('.phone-thumbs li:nth-child(3) img')).click();
expect(element(by.css('img.phone')).getAttribute('src')).toMatch(/img\/phones\/nexus-s.2.jpg/);

element(by.css('.phone-thumbs li:nth-child(1) img')).click();
expect(element(by.css('img.phone')).getAttribute('src')).toMatch(/img\/phones\/nexus-s.0.jpg/);
});
});


执行如下命令进行测试:

npm run protractor

#测试结果如下:
------------------------------------
PID: 4250 (capability: chrome #1)
------------------------------------

Using ChromeDriver directly...
.......

Finished in 9.867 seconds
7 tests, 11 assertions, 0 failures


5.实验:

Controllers中的PhoneDetailCtrl加入:

$scope.hello = function(name) {
alert('Hello ' + (name || 'world') + '!');
}


同时在phone-detail.html中加入:

<h1>{{phone.name}}</h1>
<button id="{{phone.name}}" ng-click="hello(phone.name)">Hello</button>
<p>{{phone.description}}</p>
...


效果如下图所示:



这样就完成了一个ng-click的操作.

事件处理方法,除了ng-click还有其它如:

ngMousemove

ngMouseleave

ngMouseover

ngKeyup

ngSubmit

....

可以根据个人需要进行选择,和JS本身自带的方法差不多,这里只不过angularjs又多封装了一层.
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