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

 
 
 Search:  
 
 Sort by:  price name  
 
 
 
 
  
 
名字：{{item.name}}
 
性能：{{item.title}}
 
价格：{{item.price | currency}}
 
 
 
 
 

2. Details page view

是一个自定义指令，实现轮播图的功能 
  
 
设备：{{data.name}}
 
性能：{{data.desc}}
 
 

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:

 --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:

The template (slide.html) is as follows:

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.