laravel 5 实现模板主题功能
很多cms里都有模板主题功能,我们可以通过一个配置切换主题,这个功能在laravel下如何实现呢?今天我们就来探讨下这个问题。
众所周知,laravel渲染模板是通过View::make()实现的,需要显式指定模板文件路径:
复制代码 代码如下:
function index()
{
return View::make('index.index');
}
既然这样,我们就可以自己实现模板主题功能,我们只需要将模板文件放到一个主题名称对应的目录里就行,比如默认主题为 default 的话,,我们就这样写:
复制代码 代码如下:
function index()
{
return View::make('default.index.index');
}
自定义主题 custom :
复制代码 代码如下:
function index()
{
return View::make('custom.index.index');
}
从配置文件中读取主题名:
复制代码 代码如下:
function index()
{
return View::make(Config::get('app.theme','default').'.index.index');
}
这样基本就实现模板主题化的功能了,但还存在一个问题,那就是custom主题必须实现所有default主题的所有模板,否则会导致某些页面模板文件不存在报错,那么进一步优化:
复制代码 代码如下:
function index()
{
$theme = Config::get('app.theme','default');
$tpl = $theme.'.index.index';
if (!View::exists($tpl)) {
$tpl = 'default.index.index';
}
return View::make($tpl);
}
就是在渲染模板之前,先检测模板文件是否存在,不存在的话则使用default主题中对应的模板。
这么多行代码,我们可以继续封装一下,这时候要用到Response对象了,我们知道 Response::view() 等同于 View::make(),而Response还有一个方法Response::macro()方法可以用来定义一个宏,我们可以把逻辑封装到宏里面:
复制代码 代码如下:
Response::macro('render',function($path,$data=array()){
$theme = Config::get('app.theme','default');
$tpl = $theme.'.'.$path;
if (!View::exists($tpl)) {
$tpl = 'default.' . $path;
}
return Response::view($tpl,$data);
});
使用:
复制代码 代码如下:
function index()
{
$bindings = array(
'title' => '首页'
);
return Response::render('index.index',$bindings);
}
需要注意的是传入模板的变量得通过Response::render的第二个参数。
今天的教程就先到这里吧,后续我们再来深入分析一下,希望大家能够喜欢。

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