angularjs filter 简介

Home / Article MrLee 2016-8-12 2228

系统的学习了一下angularjs,发现angularjs的有些思想根php的模块smarty很像,例如数据绑定,filter。如果对 smarty比较熟悉的话,学习angularjs会比较容易一点。这篇简单说一下angularjs的filter功能,angularjs的 filter功能可分为二种,一种是内置的过滤器,一种是自定义的。
一,内置的过滤器
1,uppercase,lowercase大小转换
{{ "lower cap string" | uppercase }}     //结果:LOWER CAP STRING
{{ "TANK is GOOD" | lowercase }}         //结果:tank is good

|这里的竖线是一种管道功能,如果对linux比较熟悉的话,这块的|根linux的管道功能,基本是一样的
2,json格式化
    {{ {foo: "bar", baz: 23} | json }}    //结果:{ "foo": "bar", "baz": 23 }  

 
注意:bza没格式前是没有双引号的,格式化后就转换成了json数据了。
3,date格式化
    {{ 1304375948024 | date }}                          //结果:May 3, 2011  
    {{ 1304375948024 | date:"MM/dd/yyyy @ h:mma" }}     //结果:05/03/2011 @ 6:39AM  
    {{ 1304375948024 | date:"yyyy-MM-dd hh:mm:ss" }}    //结果:2011-05-03 06:39:08  

4,number格式化
    {{ 1.234567 | number:1 }}    //结果:1.2  
    {{ 1234567 | number }}       //结果:1,234,567  

5,currency货币格式化
    {{ 250 | currency }}                 //结果:$250.00  
    {{ 250 | currency:"RMB ¥ " }}       //结果:RMB ¥ 250.00  

6,filter查找
    {{ [{"age": 20,"id": 10,"name": "iphone"},  
    {"age": 12,"id": 11,"name": "sunm xing"},  
    {"age": 44,"id": 12,"name": "test abc"}  
    ] | filter:'s'}}    //查找含有有s的行  
      
    //上例结果:[{"age":12,"id":11,"name":"sunm xing"},{"age":44,"id":12,"name":"test abc"}]  
      
    {{ [{"age": 20,"id": 10,"name": "iphone"},  
    {"age": 12,"id": 11,"name": "sunm xing"},  
    {"age": 44,"id": 12,"name": "test abc"}  
    ] | filter:{'name':'iphone'} }}   //查找name为iphone的行  
      
    //上例结果:[{"age":20,"id":10,"name":"iphone"}]  

7,limitTo字符串,对像的截取
{{ "i love tank" | limitTo:6 }}           //结果:i love  
{{ "i love tank" | limitTo:-4 }}          //结果:tank  
  
{{ [{"age": 20,"id": 10,"name": "iphone"},  
{"age": 12,"id": 11,"name": "sunm xing"},  
{"age": 44,"id": 12,"name": "test abc"}  
] | limitTo:1 }}     //结果:[{"age":20,"id":10,"name":"iphone"}]

8,orderBy对像排序
    {{ [{"age": 20,"id": 10,"name": "iphone"},  
    {"age": 12,"id": 11,"name": "sunm xing"},  
    {"age": 44,"id": 12,"name": "test abc"}  
    ] | orderBy:'id':true }}        //根id降序排  
      
    {{ [{"age": 20,"id": 10,"name": "iphone"},  
    {"age": 12,"id": 11,"name": "sunm xing"},  
    {"age": 44,"id": 12,"name": "test abc"}  
    ] | orderBy:'id' }}           //根据id升序排  

 
二,自定filter功能
我找了一个基本angularjs的mvc框架,phonecat,自定义filter也是在这基础写的,这个框架挺好用的。
1,filters.js添加一个module
    angular.module('tanktest', []).filter('tankreplace', function() {  
        return function(input) {  
            return input.replace(/tank/, "=====")  
        };  
    });  

2,app.js中加载这个module
    var phonecatApp = angular.module('phonecatApp', [  
      'ngRoute',  
      'phonecatControllers',  
      'facebookControllers',  
      'tanktest'  
    ]);  

3,html中调用
    {{ "TANK is GOOD" | lowercase |tankreplace}}   //结果:===== is good  

 
注意:| lowercase |tankreplace管道命令可以有多个

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