angularjs-$filter及callee,$watch
更新:HHH   时间:2023-1-7


#angularjs常用过滤器
<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8" />
  <title></title>
  <script src="js/angular.min.js"></script>
 </head>
 <body>
  <div ng-app="app" ng-controller="ctrl">
   货币currency:{{999.99|currency:'$':1}} <br />
   数字number:{{999.111|number:2}} <br />
   大写lowercase:{{"CXIONG"|lowercase}} <br />
   小写uppercase: {{"cxiong"|uppercase}} <br />
   截取字符limitTo:{{"cxiong"|limitTo:2:1}} <br />
   日期data:{{time|date:'yyyy年MM月dd日 HH时mm分ss秒'}} <br />
   排序orderBy:{{data|orderBy}} <br />
   <!--filter精确匹配-->
   过滤filter:{{data|filter:1:true}} <br />
  </div>

  <script type="text/javascript"> 
   var m=angular.module('app',[]);
   m.controller('ctrl',['$scope',function($scope){
     $scope.time=new Date().getTime()
     $scope.data=[1,3,4,55,66,23,14,41]
    }]); 
   
  </script>
 </body>
</html>
#$filter和callee应用表格排序
<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title></title>
  <script type="text/javascript" src='js/angular.min.js'> </script>
  <style type="text/css">
   .ng-cloak{display:none;}
  </style>
 </head>
 <body ng-app="hd" ng-cloak class="ng-cloak">
  <div ng-controller="ctrl">
   <table border="" cellspacing="" cellpadding="">
    <tr>
     <th ng-click="sort('name')">名称</th>
     <th ng-click="sort('num')">数量</th>
     <th ng-click="sort('price')">价格</th>
    </tr>
    <tr ng-repeat="d in data">
     <td>`d`.`name`</td>
     <td>`d`.`num`</td>
     <td>`d`.`price`</td>
    </tr>
   </table>
  </div>
  
  <script type="text/javascript">
   var m=angular.module('hd',[])
   m.controller('ctrl',['$scope','$filter',function($scope,$filter){
    $scope.data=[
     {'name':'iphone6','num':150,'price':3999},
     {'name':'beats','num':100,'price':999},
     {'name':'iphone7','num':500,'price':5999},
     {'name':'ipad','num':250,'price':1999}
    ]
    var status=true
    $scope.sort=function(field){
     //arguments.callee 全局存放静态变量
     if (arguments.callee[field]=='undefine') {
      arguments.callee[field]=true
     }
     arguments.callee[field]=!arguments.callee[field]
     $scope.data=$filter('orderBy')($scope.data,field,arguments.callee[field])
    }
    
   }])
  </script>
 </body>
</html>
#全局变量保存状态
<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title></title>
  <script type="text/javascript" src='js/angular.min.js'> </script>
  <style type="text/css">
   .ng-cloak{display:none;}
  </style>
 </head>
 <body ng-app="hd" ng-cloak class="ng-cloak">
  <div ng-controller="ctrl">
   <table border="1" cellspacing="" cellpadding="">
    <tr>
     <th ng-click="sort('name')">名称</th>
     <th ng-click="sort('num')">数量 `status`
      <span ng-if="status">升序</span>       
      <span ng-if="!status">降序</span> 
     </th>
     <th ng-click="sort('price')">价格</th>
    </tr>
    <tr ng-repeat="d in data">
     <td>`d`.`name`</td>
     <td>`d`.`num`</td>
     <td>`d`.`price`</td>
    </tr>
   </table>
  </div>
  
  <script type="text/javascript">
   var m=angular.module('hd',[])
   m.controller('ctrl',['$scope','$filter',function($scope,$filter){
    $scope.data=[
     {'name':'iphone6','num':150,'price':3999},
     {'name':'beats','num':100,'price':999},
     {'name':'iphone7','num':500,'price':5999},
     {'name':'ipad','num':250,'price':1999}
    ]
    $scope.status=false
    $scope.sort=function(field){
     //arguments.callee 全局存放静态变量
//     if (arguments.callee[field]=='undefine') {
//      arguments.callee[field]=true
//     }
//     arguments.callee[field]=!arguments.callee[field]     
//     $scope.data=$filter('orderBy')($scope.data,field,arguments.callee[field])
     $scope.status=!$scope.status
     $scope.data=$filter('orderBy')($scope.data,field,$scope.status)
    }
    
   }])
  </script>
 </body>
</html>
#$watch监控某个变量
<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8" />
  <title></title>
  <script src="js/angular.min.js"></script>
 </head>
 <body>
  <div ng-app="app" ng-controller="ctrl">
   $watch: <input type="text" ng-model="title"/>`err`
  </div>

  <script type="text/javascript"> 
   var m=angular.module('app',[]);
   m.controller('ctrl',['$scope',function($scope){
     $scope.title=''
     //n为当前输入字符,o为上一次字符
     $scope.$watch('title',function(n,o){
      $scope.err=n.length>0?'':'不能为空';
     })
    }]); 
   
  </script>
 </body>
</html>
#$watch监控某个对象
<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title></title>
  <script type="text/javascript" src='js/angular.min.js'> </script>
  <style type="text/css">
   .ng-cloak{display:none;}
  </style>
 </head>
 <body ng-app="hd" ng-cloak class="ng-cloak">
  <div ng-controller="ctrl">
   请输入姓名:<input type="text" ng-model="odata.name"/>`err`
  </div>
  
  <script type="text/javascript">
   var m=angular.module('hd',[])
   m.controller('ctrl',['$scope','$filter',function($scope,$filter){
   
    $scope.odata={'name':'cxiong','age':29};
    $scope.$watch('odata.name',function(n,o){
     $scope.err=n.length?'':'不能为空';
    });
   }])
  </script>
 </body>
</html>
#$watch和$filter实现排序和搜索框功能,自定义加*过滤器
<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title></title>
  <script type="text/javascript" src='js/angular.min.js'> </script>
  <style type="text/css">
   .ng-cloak{display:none;}
  </style>
 </head>
 <body ng-app="hd" ng-cloak class="ng-cloak">
  <div ng-controller="ctrl">
   搜索框:<input type="text" ng-model="search"/>
   <table border="1" cellspacing="" cellpadding="">
    <tr>
     <th ng-click="sort('name')">名称</th>
     <th ng-click="sort('num')">数量
      <span ng-if="status">升序</span>       
      <span ng-if="!status">降序</span> 
     </th>
     <th ng-click="sort('price')">价格</th>
    </tr>
    <tr ng-repeat="d in tmp">
     <td>`d`.`name`</td>
     <td>`d`.`num`</td>
     <td>{{d.price|truncate}}</td>
    </tr>
   </table>
  </div>
  
  <script type="text/javascript">
   var m=angular.module('hd',[]);
   //自定义加*过滤器
   m.filter('truncate',function(){
    return function(price){
     return String(parseInt(price/100))+'**元'
    }
   })
   
   m.controller('ctrl',['$scope','$filter',function($scope,$filter){
    $scope.data=[
     {'name':'iphone6','num':150,'price':3999},
     {'name':'beats','num':100,'price':999},
     {'name':'iphone7','num':500,'price':5999},
     {'name':'ipad','num':250,'price':1999}
    ]
    
    //排序功能
    $scope.status=false
    $scope.sort=function(field){
     //arguments.callee 全局存放静态变量
//     if (arguments.callee[field]=='undefine') {
//      arguments.callee[field]=true
//     }
//     arguments.callee[field]=!arguments.callee[field]     
//     $scope.data=$filter('orderBy')($scope.data,field,arguments.callee[field])
     $scope.status=!$scope.status
     
     $scope.tmp=$filter('orderBy')($scope.data,field,$scope.status)
    }
    
    //搜索框功能
    //过滤后数据。用于显示
    $scope.tmp=$scope.data
    $scope.$watch('search',function(n,o){
     $scope.tmp=$filter('filter')($scope.data,n)
    })
   }])
  </script>
 </body>
</html>


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