angular 模块化之directive
通过使用directive使页面模块化。需要哪部分直接调用即可。原本这些操作需要后端配合，现在前端即可。将原本的html代码拆为不同的模块，然后通过directive衔接加载到主页面中。首先页面通过directive包含进来，然后重新建一个module，将这个新的module注入到主module中。
主要可以看directive.js文件中的var app = angular.module("store-directives",[]);
app.js文件中的var app = angular.module('gemStore', ["store-directives"]);这一句就和上面的那句正好对应上，将store-directives注入到了主模块中
另外，别忘了将directive.js文件在html的主文件中进行加载。
关于directive的具体用法EAC和templateUrl，与html对应的关系等等具体这里就不说了。
补充说明：
angular中为了js书写规范和清晰，建议用(function(){})();包住原本的代码。
ng-include也可以直接将html引入到主页面中，进行模块化，需要注意的是，ng-include加载进来的模块的是需要一对双引号和一对单引号的。即： ng-include="'product-description.html'"
可以给controller定义别名，这样页面中调用的值可以通过点别名来加载，这样有利于模块化数据，使页面数据更清晰。一眼便知是哪一个模块的数据。
关于别名和controller，别名和controller都可以直接写到directive中，具体的代码看directive.js文件中productGallery和productTabs这两个directive便知。全部完整的代码已经全部贴出。
index.html部分：
<!DOCTYPE html>
<html ng-app="gemStore">
<head>
<link rel="stylesheet" type="text/css" href="bootstrap.min.css" />
<script type="text/javascript" src="angular.min.js"></script>
<script type="text/javascript" src="app.js"></script>
<script type="text/javascript" src="directive.js"></script>
</head> <body ng-controller="StoreController as store">
<!-- Store Header -->
<header>
<h1 class="text-center">Flatlander Crafted Gems</h1>
<h2 class="text-center">– an Angular store –</h2>
</header> <!-- Products Container -->
<div class="list-group">
<!-- Product Container -->
<div class="list-group-item" ng-repeat="product in store.products">
<h3>{{product.name}} <em class="pull-right">{{product.price | currency}}</em></h3> <!-- Image Gallery -->
<product-gallery></product-gallery> <!-- Product Tabs -->
<product-tabs></product-tabs>
</div> </div>
</body>
</html>
app.js部分：
(function() {
var app = angular.module('gemStore', ["store-directives"]);
app.controller('StoreController', function(){
this.products = gems;
});
app.controller('ReviewController', function() {
this.review = {};
this.addReview = function(product) {
product.reviews.push(this.review);
this.review = {};
};
});
var gems = [{
name: 'Azurite',
description: "Some gems have hidden qualities beyond their luster, beyond their shine... Azurite is one of those gems.",
shine: 8,
price: 110.50,
rarity: 7,
color: '#CCC',
faces: 14,
images: [
"images/gem-02.gif",
"images/gem-05.gif",
"images/gem-09.gif"
],
reviews: []
}, {
name: 'Bloodstone',
description: "Origin of the Bloodstone is unknown, hence its low value. It has a very high shine and 12 sides, however.",
shine: 9,
price: 22.90,
rarity: 6,
color: '#EEE',
faces: 12,
images: [
"images/gem-01.gif",
"images/gem-03.gif",
"images/gem-04.gif",
],
reviews: []
}, {
name: 'Zircon',
description: "Zircon is our most coveted and sought after gem. You will pay much to be the proud owner of this gorgeous and high shine gem.",
shine: 70,
price: 1100,
rarity: 2,
color: '#000',
faces: 6,
images: [
"images/gem-06.gif",
"images/gem-07.gif",
"images/gem-08.gif"
],
reviews: []
}];
})();
directive.js
(function() {
var app = angular.module("store-directives",[]);
app.directive("productDescription", function() {
return {
restrict: 'E',
templateUrl: "product-description.html"
};
});
app.directive("productReviews", function() {
return {
restrict: 'E',
templateUrl: "product-reviews.html"
};
});
app.directive("productSpecs", function() {
return {
restrict:"A",
templateUrl: "product-specs.html"
};
});
app.directive("productTabs", function() {
return {
restrict: "E",
templateUrl: "product-tabs.html",
controller: function() {
this.tab = 1;
this.isSet = function(checkTab) {
return this.tab === checkTab;
};
this.setTab = function(activeTab) {
this.tab = activeTab;
};
},
controllerAs: "tab"
};
});
app.directive("productGallery", function() {
return {
restrict: "E",
templateUrl: "product-gallery.html",
controller: function() {
this.current = 0;
this.setCurrent = function(imageNumber){
this.current = imageNumber || 0;
};
},
controllerAs: "gallery"
};
});
})();
product-description.html
<!-- Description Tab's Content -->
<div ng-show="tab.isSet(1)">
<h4>Description</h4>
<blockquote>{{product.description}}</blockquote>
</div>
product-reviews.html
<!-- Product Reviews List -->
<ul>
<h4>Reviews</h4>
<li ng-repeat="review in product.reviews">
<blockquote>
<strong>{{review.stars}} Stars</strong>
{{review.body}}
<cite class="clearfix">—{{review.author}}</cite>
</blockquote>
</li>
</ul> <!-- Review Form -->
<form name="reviewForm" ng-controller="ReviewController as reviewCtrl" ng-submit="reviewCtrl.addReview(product)"> <!-- Live Preview -->
<blockquote >
<strong>{{reviewCtrl.review.stars}} Stars</strong>
{{reviewCtrl.review.body}}
<cite class="clearfix">—{{reviewCtrl.review.author}}</cite>
</blockquote> <!-- Review Form -->
<h4>Submit a Review</h4>
<fieldset class="form-group">
<select ng-model="reviewCtrl.review.stars" class="form-control" ng-options="stars for stars in [5,4,3,2,1]" title="Stars">
<option value>Rate the Product</option>
</select>
</fieldset>
<fieldset class="form-group">
<textarea ng-model="reviewCtrl.review.body" class="form-control" placeholder="Write a short review of the product..." title="Review"></textarea>
</fieldset>
<fieldset class="form-group">
<input ng-model="reviewCtrl.review.author" type="email" class="form-control" placeholder="jimmyDean@example.org" title="Email" />
</fieldset>
<fieldset class="form-group">
<input type="submit" class="btn btn-primary pull-right" value="Submit Review" />
</fieldset>
</form>
product-specs.html
<!-- Spec Tab's Content -->
<h4>Specs</h4>
<ul class="list-unstyled">
<li>
<strong>Shine</strong>
: {{product.shine}}</li>
<li>
<strong>Faces</strong>
: {{product.faces}}</li>
<li>
<strong>Rarity</strong>
: {{product.rarity}}</li>
<li>
<strong>Color</strong>
: {{product.color}}</li>
</ul>
product-tabs.html
<!-- Tabs Go Here -->
<section>
<ul class="nav nav-pills">
<li ng-class="{ active:tab.isSet(1) }">
<a href ng-click="tab.setTab(1)">Description</a>
</li>
<li ng-class="{ active:tab.isSet(2) }">
<a href ng-click="tab.setTab(2)">Specs</a>
</li>
<li ng-class="{ active:tab.isSet(3) }">
<a href ng-click="tab.setTab(3)">Reviews</a>
</li>
</ul> <!-- Description Tab's Content -->
<product-description ng-show="tab.isSet(1)" ></product-description> <!-- Spec Tab's Content -->
<div product-specs ng-show="tab.isSet(2)"></div> <!-- Review Tab's Content -->
<product-reviews ng-show="tab.isSet(3)"></product-reviews> </section>
product-gallery.html
<div ng-show="product.images.length">
<div class="img-wrap">
<img ng-src="{{product.images[gallery.current]}}" />
</div>
<ul class="img-thumbnails clearfix">
<li class="small-image pull-left thumbnail" ng-repeat="image in product.images">
<img ng-src="{{image}}" />
</li>
</ul>
</div>
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