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laravel 5 实现模板主题功能(续)_PHP

May 31, 2016 pm 01:16 PM
laravel template

在之前一篇文章中我介绍了通过定义Response宏的方式来实现动态改变模板文件路径以实现主题功能: laravel实现模板主题功能,但后来我发现这种方法有个弊端,在模板中使用@extends必须显式指定模板路径,这可能造成混乱,我决定还是改变思想,主题和主题之间应该是完全隔离的,不存在就是不存在,不要自动去另外的主题中寻找替代的模板。

而原来定义response宏的方式可以实现,但我决定使用更加规范的方法。

laravel的View类里有一个方法 View::addNamespace ,这个方法在手册"开发扩展包"一节中有提到,不得不说Laravel手册排版逻辑混乱,这个方法说明应当放在"视图"章节才是,题外话就不说了,先来说说这个方法吧。

laravel渲染视图有一种写法:

代码如下:


View::make('namespace::path');
//例如 View::make('default::index.index');

如何定义namespace呢,就是通过这个方法啦:

代码如下:


View::addNamespace('default',app_path().'/views/default');

聪明的朋友可能已经感觉到了,这个功能可以助我们实现模板主题化,比如:

代码如下:


//注册蓝色主题
View::addNamespace('blue',app_path().'/views/blue');
//注册红色主题
View::addNamespace('red',app_path().'/views/red');
//注册绿色主题
View::addNamespace('green',app_path().'/views/green');

之后调用:

代码如下:


//渲染绿色主题下的index.index模板
View::make('green::index.index');

然而我们需要事先通过View::addNamespace方法先注册这几个主题的路径映射,并且在渲染的时候需要显式指定namespace.

我感觉不是很方便,难道View不能设定一个默认的namespace吗?这样我们只要一次设置比如:

代码如下:


//我们可以把这个写在 __construct 里面
View::setDefaultNamespace('blue',app_path().'/views/blue');

之后:

代码如下:


//实际上相当于 View::make('blue::index.index');
View::make('index.index');

更进一步,我们可以通过后台设置主题,把主题名写进数据库,前台读取并设置主题:

代码如下:


//假设从数据库中读取配置,Option是模型类
$theme = Option::getByKey('theme');
View::setDefaultNamespace($theme,app_path().'/views/'.$theme);

这样就实现了后台切换主题了。

但是很遗憾,View并没有setDefaultNamespace方法,所以我决定创建一个项目,专门针对laravel进行核心类库扩展,这个功能已经实现,可以查看我的项目:项目地址 ,在src/Keepeye/Laravel/View/查看使用方法吧。

好了,关于laravel模板主题功能的实现,我们就探讨到这里了,希望大家能够喜欢。

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