Home > Article > Web Front-end > AngularJS Phonecat example explanation
Foreword
I have read some information about AngularJS recently. There is an example of Phonecat on its official website which is very good. After looking at it for a while, I really can’t stand it. So I simply implemented it myself and looked at it from the inside when encountering problems. It’s also a good idea to look for answers. No matter how much you say or see, it’s better to do it yourself, so let’s get started.
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1. Layout
The layout is very simple. The sidebar of the homepage is an input box and a drop-down box, and the right side is a list. No major changes will be made to the homepage during implementation. Make some changes to the details page, try to simplify it, and consider adding a custom command (carousel image).
2. Architecture analysis
First think about the services you need to use.
Since what we are going to do is a single-page application, we need to serve $route and $location. Use service $resource to obtain resources. Use the service $filter to filter and sort the homepage data. To summarize:
1). The services $route and $location are responsible for routing management and jumps.
2). Service $resource is responsible for resource acquisition.
3). The service $filter is responsible for filtering and sorting data.
3. Home page and detail page view
1. Home page view
<div class="main"> <div class="side"> <p> <label>Search:</label> <input ng-model="filterKey" type="text" style="width:150px; "> </p> <p> <label>Sort by:</label> <select ng-model="sortKey"> <option value="price">price</option> <option value="name" ng-selected="true">name</option> </select> </p> </div> <div class="content"> <ul> <li ng-repeat="item in data" ng-click="$location.path('detail/'+item.id)"> <img ng-src={{item.img}}> <div> <h2>名字:{{item.name}}</h2> <p>性能:{{item.title}}</p> <p>价格:{{item.price | currency}}</p> </div> </li> </ul> </div> </div>
2. Details page view
<slide></slide>是一个自定义指令,实现轮播图的功能 <div class="detail"> <slide links='links' w='200' h='200'></slide> <div class="text"> <h2>设备:{{data.name}}</h2> <p>性能:{{data.desc}}</p> </div> </div>
4. Logical analysis
1. First, explain the information of the external resource infor.json. It is an array, each item of the array is a json object, containing the following fields:
{ "id" : 1, "name" : "aaa", "title" : "bbb", "desc" : "ccc", "img" : "img/a.jpg", "price" : 100, "showList" : "[{"url":"img/b.jpg"},{"url":"img/c.jpg"}]" }
2. Route management ($route)
m1.config(['$routeProvider',function($routeProvider){ $routeProvider .when('/index',{ templateUrl : 'template/index.html', controller : 'index' }) .when('/detail/:str',{ templateUrl : 'template/detail.html', controller : 'detail' }) .otherwise({ redirectTo : '/index' }); }]);
When the shape is http://localhost/phonecat/phone.html#/index load index Template
When the shape is http://localhost/phonecat/phone.html#/detail/0, load the detail template
The default is http://localhost/phonecat/phone.html#/index
3. Home page (index ) Logical analysis
Home page resource loading:
var arr = []; var objRe = $resource('infor.json'); $scope.data = arr = objRe.query(); //获得data数据后首页即可进行渲染
Filtering and sorting of home page data:
$scope.$watch('filterKey',function(){ //监听输入框的数据变化,完成数据的筛选 if($scope.filterKey){ $scope.data = $filter('filter')(arr,$scope.filterKey); }else{ $scope.data = arr; } }) $scope.$watch('sortKey',function(){ //监听select下拉框的数据变化,完成数据的排序 if($scope.sortKey){ $scope.data = $filter('orderBy')($scope.data,$scope.sortKey); }else{ $scope.data = arr; } }) //这里有个需要注意的地方,我们用一个数组arr作为媒介,避免bug
Click on the list to jump to the details page:
$scope.$location = $location; //将$location挂载到$scope下,模板中便可使用$location提供的方法
Template As follows:
<li ng-repeat="item in data" ng-click="$location.path('detail/'+item.id)"> --点击的时候将列表跳转到详情页
4. Logical analysis of details page
m1.controller('detail',['$scope','$resource','$location',function($scope,$resource,$location){ var id = parseInt($location.path().substring(8)); //获取索引 $resource('infor.json').query(function(data){ $scope.data = data[id]; $scope.links = eval($scope.data.showList); //自定义指令需要用到此数据 }); }]); //注意:$resource.query()为异步操作。数据相关的逻辑需要在回调中完成,否则可能会出现数据undefined的情况。
5. Writing of custom specified slides
The custom specified function of AngularJS is very powerful, providing a way to achieve component-based development ideas. Let's simply implement a carousel component.
Usage example: c5d78ac0771abcd9072419e8fbde58f8813d8b7ad24b2efd298fbc1d2e96befb
The template (slide.html) is as follows:
<div class="slide"> <ul> <li ng-repeat="item in links"> <img ng-src={{item.url}}> </li> </ul> </div>
m1.directive('slide',function(){ return { restrict : 'E', templateUrl : 'template/slide.html', replace : true, scope : { links : '=', w : '@', h : '@' }, link : function(scope,element,attris){ setTimeout(function(){ var w = scope.links.length * scope.w; var h = scope.h; var iNow = 0; $(element).css({'width':scope.w,'height':h,'position':'relative','overflow':'hidden'}) $(element).find('ul').css({'width':w,'height':h,'position':'absolute'}); setTimeout(function(){ $(element).find('li').css({'width':scope.w,'height':h,'float':'left'}); $(element).find('img').css({'width':scope.w,'height':h}); },0); setInterval(function(){ iNow++; $(element).find('ul').animate({'left':-iNow*scope.w},function(){ if(iNow==scope.links.length-1){ $(element).find('ul').css('left',0); iNow = 0; } }); },1000) },50) } } })
Conclusion
AngularJS provides us with many useful functions, such as routing management, data filtering, etc. More powerful functions require further exploration, and this article is only a good start.