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CI(CodeIgniter)框架配置

Jun 06, 2016 pm 08:22 PM
ci codeigniter

今天研究了下CI框架的说明文档,打算在下次项目中用用看。先把今天看完的内容整理整理,基本配置非常简单,好像在配置方面 在没有比ci框架简便的了。。

MVC的组成部分:

模型 (Model)
代表你的数据结构。通常来说,你的模型类将包含取出、插入、更新你的数据库资料这些功能。
视图 (View)
是展示给用户的信息。一个视图通常是一个网页。
控制器 (Controller)
是模型、视图以及其他任何处理 HTTP 请求所必须的资源之间的中介,并生成网页。
举例
比如一批统计数据你可以分别用柱状图、饼图来表示。C存在的目的则是确保M和V的同步,一旦M改变,V应该同步更新。

CI的特点:

简单:CodeIgniter是经过 Apache/BSD-style 开源许可授权的,只要你愿意就可以使用它。阅读 许可协议 可获得更多的信息()
免费:CodeIgniter是真正的轻量级。我们的核心系统只需要一些非常小的库,这与那些需要更多资源的框架完全相反
MVC:CodeIgniter使用了模型(Model)- 视图(View)- 控制器(Controllers)的方法,这样可以更好地使表现层和逻辑层分离。

特别注意:

每个控制器都是一个 类Class, 在每个 Class 里面的 function 都是一个页面, 嗯, 这个概念很重要!

入口方法:

入口——>控制器——>方法——>参数
localhost/index.php/welcome/index

控制器:

1、到底什么是控制器
简而言之,一个控制器就是一个类文件
用户通过URL访问的就是某个控制器类中的具体成员方法
并由这个方法中的代码去做某些操作

2、如何创建控制器
a.创建文件夹\application\controllers
b.类名必须以大写字母开头
c.继承核心的控制器类CI_Controller

3、创建方法
a.就是创建一个成员方法function()
b.默认访问的是index方法

4、URL如何传递参数给方法
方法段后的按次序传入方法中的形式参数

配置CI:

1.在CI官网下载最新版的CI框架,目前最新版的是2.13版本
2.解压之后,有三个文件夹:
application       开发要用到的配置文件,Model,VIew,Control 的等文件……
system             CI框架源码
user_guide       用户手册
index.php          CI的接口文件
3.根目录建立一个文件夹ci,把 application ,,system和index.php复制到 ci下,这个文件夹,自己可以随便写
4.然后访问:     localhost/ci          实际访问路径——>         localhost/ci/index.php/welcome/index   

CI(CodeIgniter)框架配置



这样就可以用了,具体使用说明如下:

1.上边讲到它访问的入口方法
入口——>控制器——>方法——>参数

2.主要就是application下的controllers文件夹下的welcome.php文件访问了views下的welcome_message.php文件

3.它是怎么访问的呢?
在config文件夹下有个路由文件routes.php
配置了路由路径文件welcome
因此可以看到Welcome to Codelgniter!

4.在models 里建立业务逻辑文件,在views里建立视图文件

复制代码 代码如下:


/*注意的是,类名(首字母大写,也是文件名)不能与方法名相同,否则会报错,像这样的Index,下边有一个index 方法,就会出错*/
class Index extends CI_Controller{
    function index(){

    }
}

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