Angular.Js中过滤器filter与自定义过滤器filter实例详解

时间:2020-05-15 bboyjoe 人气:0

本文主要给大家介绍了Angular.Js过滤器filter与自定义过滤器filter的相关内容，分享出来供大家参考学习，下面来看看详细的介绍：

一、AngularJS的filter过滤器：

uppercase|lowercase:大小写转换过滤
json:json格式过滤
date:日期格式过滤
number:数字格式过滤
currency:货币格式过滤
filter:查找
limitTo：字符串对象截取
orderBy:对象排序

<!DOCTYPE html> 
<html lang="zh_CN"> 
<head> 
 <meta charset="UTF-8"> 
 <title>Angular基础</title> 
</head> 
<body> 
<div ng-app="myApp"> 
 
  <!-- 向表达式添加过滤器：可以通过一个管道字符(|)和一个过滤器添加到表达式中--> 
  <p>将字符串转换为大小写：</p> 
  <div ng-controller="uppercaseController"> 
   <p>姓名为 {{ person.lastName | uppercase }}</p> 
  </div> 
  <div ng-controller="lowercaseController"> 
   <p>姓名为 {{ person.lastName | lowercase }}</p> 
  </div> 
 
  <p>货币过滤：</p> 
  <div ng-controller="costController"> 
   数量：<input type="number" ng-model="quantity"> 
   价格：<input type="number" ng-model="price"> 
   <p>总价 = {{ (quantity * price) | currency }}</p> 
   {{250 |currency:"RMB ￥"}} 
  </div> 
 
  <!-- 向指令添加过滤器：可以通过一个管道字符(|)和一个过滤器添加到指令中--> 
  <p>按国家的字母顺序排序对象：</p> 
  <div ng-controller="namesController"> 
   <p>循环对象：</p> 
   <ul> 
    <li ng-repeat="x in names | orderBy:'country'"> 
     {{ x.name + ', ' + x.country }} 
    </li> 
   </ul> 
   <!--json格式过滤--> 
   {{jsonText | json}}  <br/> 
   <!--date格式过滤--> 
   <span>{{1288323623006 | date:'yyyy-MM-dd HH:mm:ss'}}</span><br/> 
   <!--number格式过滤--> 
   {{1.2345678 |number:1}}<br/> 
   <!--字符串截取--> 
   {{ "i love tank" | limitTo:6 }}<br/> 
   {{ "i love tank" | limitTo:-6 }}<br/> 
   <!--对象排序：降序--> 
   {{ [{"age": 20,"id": 10,"name": "iphone"}, 
   {"age": 12,"id": 11,"name": "sunm xing"}, 
   {"age": 44,"id": 12,"name": "test abc"} 
   ] | orderBy:'id':true }}<br/> 
   <!--对象排序：升序--> 
   {{ [{"age": 20,"id": 10,"name": "iphone"}, 
   {"age": 12,"id": 11,"name": "sunm xing"}, 
   {"age": 44,"id": 12,"name": "test abc"} 
   ] | orderBy:'id' }} 
  </div> 
  <p>按输入的字母显示对象：</p> 
  <div ng-controller="namesFilterController"> 
   <p>输入过滤：</p> 
   <p><input type="text" ng-model="name"></p> 
   <ul> 
    <li ng-repeat="x in names | filter:name | orderBy:'country':true"> 
     {{ (x.name | uppercase) + ', ' + x.country }} 
    </li> 
   </ul> 
   <p>name筛选：</p> 
   <ul> 
    <li ng-repeat="x in names | filter:{'name':name} | orderBy:'country':true"> 
     {{ (x.name | uppercase) + ', ' + x.country }} 
    </li> 
   </ul> 
 
   {{ [{"age": 20,"id": 10,"name": "iphone"}, 
   {"age": 12,"id": 11,"name": "sunm"}, 
   {"age": 44,"id": 12,"name": "test abc"} 
   ] | filter:{'name':'sunm'} }} 
  </div> 
 
</div> 
<script src="angular.min.js"></script> 
<script type="application/javascript"> 
 var myApp=angular.module('myApp',[]); 
 myApp.controller('uppercaseController',function($scope){ 
  $scope.person = { 
   firstName: "John", 
   lastName: "Doe" 
  }; 
 }); 
 myApp.controller('lowercaseController',function($scope){ 
  $scope.person = { 
   firstName: "John", 
   lastName: "Doe" 
  }; 
 }); 
 myApp.controller('costController',function($scope){ 
  $scope.quantity = 1; 
  $scope.price = 9.99; 
 }); 
 myApp.controller('namesController',function($scope){ 
  $scope.names = [ 
   {name:'Jani',country:'Norway'}, 
   {name:'Hege',country:'Sweden'}, 
   {name:'Kai',country:'Denmark'} 
  ]; 
  $scope.jsonText={foo:"bar",baz:23}; 
 }); 
 myApp.controller('namesFilterController',function($scope){ 
  $scope.names = [ 
   {name:'Jani',country:'Norway'}, 
   {name:'Hege',country:'Sweden'}, 
   {name:'Kai',country:'Denmark'} 
  ]; 
 }); 
 
</script> 
</body> 
</html>

二、AngularJs的控制器使用filter

<!DOCTYPE html> 
<html lang="zh_CN"> 
<head> 
 <meta charset="UTF-8"> 
 <title>Angular基础</title> 
</head> 
<body> 
<div ng-app="myApp"> 
 <div ng-controller="firstCtrl"> 
  {{uFirstName}}<br/> 
  {{cPrice}}<br/> 
 </div> 
 
</div> 
<script src="angular.min.js"></script> 
<script type="application/javascript"> 
 var myApp=angular.module('myApp',[]); 
 myApp.controller('firstCtrl',function($scope,$filter){ 
  $scope.firstName="zhangsan"; 
  $scope.uFirstName=$filter('uppercase')($scope.firstName); 
  $scope.price="121212"; 
  $scope.cPrice=$filter('currency')($scope.price,'RMB ￥'); 
 }) 
 
</script> 
</body> 
</html>

三、AngularJs自定义filter过滤器

<!DOCTYPE html> 
<html lang="zh_CN"> 
<head> 
 <meta charset="UTF-8"> 
 <title>Angular基础</title> 
</head> 
<body> 
<div ng-app="myApp"> 
 <div ng-controller="firstCtrl"> 
  {{welcome | replaceHello}}<br/> 
  {{welcome | replaceHello:3:5}}<br/> 
  {{welcome | rJs}}<br/> 
 </div> 
 
</div> 
<script src="angular.min.js"></script> 
<script src="filter.js"></script> 
<script type="application/javascript"> 
 var myApp=angular.module('myApp',['myApp.filter']); 
 myApp.controller('firstCtrl',function($scope){ 
  $scope.welcome="Hello AngularJs"; 
 }); 
 //自定义过滤器 
 myApp.filter('replaceHello',function(){ 
  return function(input,n1,n2){ 
   console.log(input); 
   console.log(n1); 
   console.log(n2); 
   return input.replace(/Hello/,'您好'); 
  } 
 }) 
 
</script> 
</body> 
</html>

var appFilter=angular.module('myApp.filter',[]); 
//自定义过滤器 
appFilter.filter('rJs',function(){ 
 return function(input,n1,n2){ 
  console.log(input); 
  console.log(n1); 
  console.log(n2); 
  return input.replace(/Js/,' javaScript'); 
 } 
});

总结

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