angularjs filter 詳解

系統的學習了一下angularjs，發現angularjs的有些思想根php的模塊smarty很像，例如數據綁定，filter。若是對smarty比較熟悉的話，學習angularjs會比較容易一點。這篇簡單說一下angularjs的filter功能，angularjs的filter功能可分爲二種，一種是內置的過濾器，一種是自定義的。

 

一，內置的過濾器

1，uppercase，lowercase大小轉換

{{ "lower cap string" | uppercase }}     //結果：LOWER CAP STRING
{{ "TANK is GOOD" | lowercase }}         //結果：tank is good

｜這裏的豎線是一種管道功能，若是對linux比較熟悉的話，這塊的｜根linux的管道功能，基本是同樣的

2，json格式化

{{ {foo: "bar", baz: 23} | json }}    //結果：{ "foo": "bar", "baz": 23 }

注意：bza沒格式前是沒有雙引號的，格式化後就轉換成了json數據了。

3，date格式化

{{ 1304375948024 | date }}                          //結果：May 3, 2011
{{ 1304375948024 | date:"MM/dd/yyyy @ h:mma" }}     //結果：05/03/2011 @ 6:39AM
{{ 1304375948024 | date:"yyyy-MM-dd hh:mm:ss" }}    //結果：2011-05-03 06:39:08

4，number格式化

{{ 1.234567 | number:1 }}    //結果：1.2
{{ 1234567 | number }}       //結果：1,234,567

5，currency貨幣格式化

{{ 250 | currency }}                 //結果：$250.00
{{ 250 | currency:"RMB ￥ " }}       //結果：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

//上例結果：[{"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爲iphone的行

//上例結果:[{"age":20,"id":10,"name":"iphone"}]

7，limitTo字符串，對像的截取

{{ "i love tank" | limitTo:6 }}           //結果：i love
{{ "i love tank" | limitTo:-4 }}          //結果：tank

{{ [{"age": 20,"id": 10,"name": "iphone"},
{"age": 12,"id": 11,"name": "sunm xing"},
{"age": 44,"id": 12,"name": "test abc"}
] | limitTo:1 }}     //結果：[{"age":20,"id":10,"name":"iphone"}]

8，orderBy對像排序

{{ [{"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' }}           //根據id升序排

二，自定filter功能

我找了一個基本angularjs的mvc框架，phonecat，自定義filter也是在這基礎寫的，這個框架挺好用的。

1，filters.js添加一個module

angular.module('tanktest', []).filter('tankreplace', function() {
    return function(input) {
        return input.replace(/tank/, "=====")
    };
});

2，app.js中加載這個module

var phonecatApp = angular.module('phonecatApp', [
  'ngRoute',
  'phonecatControllers',
  'facebookControllers',
  'tanktest'
]);

3，html中調用

{{ "TANK is GOOD" | lowercase |tankreplace}}   //結果：===== is good