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AngularJS Phonecat example explanation

高洛峰

Release： 2017-01-04 17:35:08

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Preface

I have read some information about AngularJS recently. There is an example of Phonecat on its official website which is very good. I just couldn’t stand it after looking at it for a while, so I decided to implement it myself. When it comes to questions, it’s also a good way to look for answers inside. 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. The homepage will not be enlarged during implementation. Modifications. 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). 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(&#39;detail/&#39;+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>

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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=&#39;links&#39; w=&#39;200&#39; h=&#39;200&#39;></slide>
  <div class="text">
    <h2>设备：{{data.name}}</h2>
    <p>性能：{{data.desc}}</p>
  </div>
</div>

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4. Logical analysis

1. First, explain the information of the external resource infor.json. It is an array. Each item in 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"}]"
}

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2. Route management ($route)

m1.config([&#39;$routeProvider&#39;,function($routeProvider){
 
  $routeProvider
    .when(&#39;/index&#39;,{
      templateUrl : &#39;template/index.html&#39;,
      controller : &#39;index&#39;
    })
    .when(&#39;/detail/:str&#39;,{
      templateUrl : &#39;template/detail.html&#39;,
      controller : &#39;detail&#39; 
    })
    .otherwise({
      redirectTo : &#39;/index&#39;
    });
 
}]);

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When the shape is http://localhost/phonecat/ phone.html#/index loads the index template

When the format is http://localhost/phonecat/phone.html#/detail/0 loads 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(&#39;infor.json&#39;);  
$scope.data = arr = objRe.query(); //获得data数据后首页即可进行渲染

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Filtering and sorting of home page data:

  $scope.$watch(&#39;filterKey&#39;,function(){ //监听输入框的数据变化，完成数据的筛选
    if($scope.filterKey){
      $scope.data = $filter(&#39;filter&#39;)(arr,$scope.filterKey);
    }else{
      $scope.data = arr; 
    }  
  })
 
  $scope.$watch(&#39;sortKey&#39;,function(){  //监听select下拉框的数据变化，完成数据的排序
    if($scope.sortKey){
      $scope.data = $filter(&#39;orderBy&#39;)($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

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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

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The template is as follows:

<li ng-repeat="item in data" ng-click="$location.path(&#39;detail/&#39;+item.id)">  --点击的时候将列表跳转到详情页

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4. Logical analysis of the details page (detail)

m1.controller(&#39;detail&#39;,[&#39;$scope&#39;,&#39;$resource&#39;,&#39;$location&#39;,function($scope,$resource,$location){
  var id = parseInt($location.path().substring(8));  //获取索引
  $resource(&#39;infor.json&#39;).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。

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5. Customization Writing designated slides

The custom designation function of AngularJS is very powerful, providing an idea for component-based development. Let's simply implement a carousel component.

Usage example:

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>

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m1.directive(&#39;slide&#39;,function(){
  return {
    restrict : &#39;E&#39;,
    templateUrl : &#39;template/slide.html&#39;,
    replace : true,
    scope : {
      links : &#39;=&#39;,
      w : &#39;@&#39;,
      h : &#39;@&#39;
    },
    link : function(scope,element,attris){
      setTimeout(function(){
        var w = scope.links.length * scope.w;
        var h = scope.h;
        var iNow = 0;
 
        $(element).css({&#39;width&#39;:scope.w,&#39;height&#39;:h,&#39;position&#39;:&#39;relative&#39;,&#39;overflow&#39;:&#39;hidden&#39;})
        $(element).find(&#39;ul&#39;).css({&#39;width&#39;:w,&#39;height&#39;:h,&#39;position&#39;:&#39;absolute&#39;});
        setTimeout(function(){
          $(element).find(&#39;li&#39;).css({&#39;width&#39;:scope.w,&#39;height&#39;:h,&#39;float&#39;:&#39;left&#39;});
          $(element).find(&#39;img&#39;).css({&#39;width&#39;:scope.w,&#39;height&#39;:h});       
        },0);
 
        setInterval(function(){
          iNow++;
          $(element).find(&#39;ul&#39;).animate({&#39;left&#39;:-iNow*scope.w},function(){
            if(iNow==scope.links.length-1){
              $(element).find(&#39;ul&#39;).css(&#39;left&#39;,0);
              iNow = 0;  
            }  
          });
        },1000)       
      },50)
 
    }
  }  
})

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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.

For more AngularJS Phonecat examples and related articles, please pay attention to the PHP Chinese website!