swift 之 mustache模板引擎

用法：

• Variable Tags

  1. {{name}} 用来渲染值name

     datas:

     let data = ["value": "test"]

     -----------
     template:

     {{value}} a lession

     -----------
     rendering:

     test a lession

• Section Tags

  1. {{#items}}...{{/items}} 执行条件语句，枚举出里面的对象

     • 按需渲染数据
     • 遍历数据
     • 获取里面的每一项

     如果{{value}}...{{/value}}中的value错误的(下面的),那么将不会被渲染：
     1. 缺少值
     2. false
     3. 0
     4. 字符串
     5. 空集合
     6. 为NSNull

     如果value 是集合的话

     datas:
     [
     "friends": [
     [ "name": "Hulk Hogan" ],
     [ "name": "Albert Einstein" ],
     [ "name": "Tom Selleck" ],
     ]
     ]

     -------------

     template:
     {{# friends }}
     - {{ name }}

     -------------
     rendering:

     - Hulk Hogan
     - Albert Einstein
     - Tom Selleck

     上面所说的集合可以是Arrays,ranges, sets, NSArray, NSSet等

     其他值既不是falsey， 也不是collection，那么这个块就会被渲染一次：

     datas:
     [
     "user": [
     "name": "Mario"
     "score": 1500
     ]
     ]

     -------------
     template:
     {{# user }}
     - {{ name }}
     - {{ score }}

     --------------
     rendering:
     - Mario
     - 1500

  2. {{^items}}...{{/items}} 对应于上方的对立面

     data:
     [
     "persons": []
     ]

     --------------
     template:
     {{# persons }}
     - {{name}} is {{#alive}}alive{{/alive}}{{^alive}}dead{{/alive}}.
     {{/ persons }}
     {{^ persons }}
     Nobody

     -------------
     rendering:
     Nobody

     --------------
     data:
     [
     "persons": [
     ["name": "Errol Flynn", "alive": false],
     ["name": "Sacha Baron Cohen", "alive": true]
     ]
     ]
     ---------------
     rendering:
     - Errol Flynn is dead.
     - Sacha Baron Cohen is alive.

• Partial Tags

  1. {{>partial}} , 嵌入其他模块

     douc.mustanche
     Guests:
     {{# guests }}
     {{> person }}

     --------------
     person.mustache

     -------------
     data:
     [
     "guests": [
     ["name": "Frank Zappa"],
     ["name": "Lionel Richie"]
     ]
     ]

     --------------
     rendering:
     Guests:
     - Frank Zappa
     - Lionel Richie

• Partial Override Tags

  1. {{<layout}}...{{/layout}} , 模板继承

     layout.mustache // title , 和content 可以被覆盖
     
     
     
     
     
     

     {{$ title }}Default title{{/ title }}

     
     {{$ content }}
     Default content
     {{/ content }}}
     
     

     ---------------
     article.mustuche:

     {{< layout }}

     {{$ title }}{{ article.title }}{{/ title }}

     {{$ content }}
     {{{ article.html_body }}}
     

     by {{ article.author }}

     {{/ layout }}

     ---------------
     data:

     [
     "article": [
     "title": "The 10 most amazing handlebars",
     "html_body": "

     ...

     ",
     "author": "John Doe"
     ]
     ]

     ----------------
     rendering:

     
     
     
     
     
     

     The 10 most amazing handlebars

     
     

     ...

     
     

     by John Doe

     
     
     

     {{$ title }}...{{/ title }}每次都会被渲染，并且只被渲染一次， no boolean checks, no collection iteration.

     一个模板可以包含很多partial override tags

     避免循环

• Set Delimiters Tags

  1. {{=<% %>=}}， 让你改变标签分隔符。

• Comment Tags

  1. {{! Wow. Such comment. }} , 注释

• paragma Tags

  {{% CONTENT_TYPE:TEXT }}

参考：GRMustache.swift