1.1.1 基本封装
iCheck是配合bootstrap包使用的前端控件,用来美化radio和checkbox的显示样式的,根据前面的“资源管理”的说明,以及官网的文档,可以很方便的把iCheck组件用资源包封装起来,顺便熟悉一下Yii 2中资源包的使用方法:
1、创建iCheck资源包ICheckAssets.php;
<?php namespace backend\assets; use yii\web\AssetBundle; class ICheckAsset extends AssetBundle { } |
2、设置资源路径,这里省事,直接将icheck包放到%yii-app%\backend\web\front-lib目录下:
<?php namespace backend\assets; use yii\web\AssetBundle; class ICheckAsset extends AssetBundle { public $basePath = ‘@webroot‘; public $baseUrl = ‘@web‘; public $css = [ ‘front-lib/icheck/skins/all.css‘, ]; public $js = [ ‘front-lib/icheck/icheck.min.js‘, ]; } |
注:iCheck支持skin,这里暂时先把所有skin全部引入。
3、设置依赖包,iCheck依赖于bootstrap,同时初始化代码依赖于jQuery,所以要将这两个配置上:
<?php namespace backend\assets; use yii\web\AssetBundle; class ICheckAsset extends AssetBundle { public $basePath = ‘@webroot‘; public $baseUrl = ‘@web‘; public $css = [ ‘front-lib/icheck/skins/all.css‘, ]; public $js = [ ‘front-lib/icheck/icheck.min.js‘, ]; public $depends = [ ‘yii\web\JqueryAsset‘, ‘yii\bootstrap\BootstrapAsset‘, ]; } |
4、iCheck组件不是直接引入CSS就可以了,而是在页面需要执行一段JS代码才能把显示样式修改过来,因此需要注册iCheck初始化代码:
<?php namespace backend\assets; use yii\web\AssetBundle; class ICheckAsset extends AssetBundle { public $basePath = ‘@webroot‘; public $baseUrl = ‘@web‘; public $css = [ ‘front-lib/icheck/skins/all.css‘, ]; public $js = [ ‘front-lib/icheck/icheck.min.js‘, ]; public $depends = [ ‘yii\web\JqueryAsset‘, ‘yii\bootstrap\BootstrapAsset‘, ]; public function registerAssetFiles($view) { parent::registerAssetFiles($view); $view->registerJs( ‘$("input").iCheck({ checkboxClass: "icheckbox_minimal-blue", radioClass: "iradio_minimal-blue", increaseArea: "20%" // optional });‘ ); } } |
注:这里固定配置为使用minimal/blue这个样式。
5、使用资源包,在AppAssets中增加配置(注意路径):
public $depends = [ ‘backend\assets\ICheckAsset‘, ‘yii\web\YiiAsset‘, ‘yii\bootstrap\BootstrapAsset‘, ]; |
6、显示效果如下:
至此,就初步完成了将iCheck封装到资源包的过程,但是现在还有几个遗留问题:
1、从上图可以看出,明显checkbox控件位置偏右了;
2、iCheck支持很多个样式,可是上面代码却固定成minimal/blue,影响适用性;
3、引入的是all.css,没有按需引入,这样会导致CSS文件比较大;
下面把上述问题逐一解决。
1.1.2 控件位置
1.1.2.1原因
在使用iCheck之前,checkbox和文字是这样的:
input控件在label控件内,label控件为了给checkbox控件空出位置,设置了一个padding-left:20px属性,使得文字向右偏移20个字节。
在使用了iCheck之后,checkbox和文字是这样的:
iCheck初始化后,将原来的input控件外面又包了一层div,导致input控件和文字被label视作一个整体,使得“padding-left:20px”属性也作用到div上,使得checkbox和文字都被右移20px。
1.1.2.2解决办法
检查label控件的属性,发现这个“padding-left:20px”属性是forms.less中定义的,这个less文件是bootstrap的,所以直接修改这个文件不是个好主意。
最终确定在资源包内修改如下:
public function registerAssetFiles($view) { parent::registerAssetFiles($view); $view->registerJs( ‘$("input").iCheck({ checkboxClass: "icheckbox_minimal-blue", radioClass: "iradio_minimal-blue", increaseArea: "20%" // optional }); $(".icheckbox_minimal-blue").css("margin-left", "-20px"); $(".iradio_minimal-blue").css("margin-left", "-20px");‘ ); } |
1.1.3 支持多样式
支持iCheck的多个样式,也是在资源包里实现:
1、首先定义样式名称:
<?php namespace backend\assets; use yii\web\AssetBundle; class ICheckAsset extends AssetBundle { const SKIN_ALL = ‘all‘; const SKIN_FLAT = ‘flat/_all‘; const SKIN_FLAT_AERO = ‘flat/aero‘; const SKIN_FLAT_BLUE = ‘flat/blue‘; const SKIN_FLAT_FLAT = ‘flat/flat‘; const SKIN_FLAT_GREEN = ‘flat/green‘; const SKIN_FLAT_GREY = ‘flat/grey‘; const SKIN_FLAT_ORANGE = ‘flat/orange‘; const SKIN_FLAT_PINK = ‘flat/pink‘; const SKIN_FLAT_PURPLE = ‘flat/purple‘; const SKIN_FLAT_RED = ‘flat/red‘; const SKIN_FLAT_YELLOW = ‘flat/yellow‘; const SKIN_FUTURICO = ‘futurico/futurico‘; const SKIN_LINE = ‘line/_all‘; const SKIN_LINE_AERO = ‘line/aero‘; const SKIN_LINE_BLUE = ‘line/blue‘; const SKIN_LINE_GREEN = ‘line/green‘; const SKIN_LINE_GREY = ‘line/grey‘; const SKIN_LINE_LINE = ‘line/line‘; const SKIN_LINE_ORANGE = ‘line/orange‘; const SKIN_LINE_PINK = ‘line/pink‘; const SKIN_LINE_PURPLE = ‘line/purple‘; const SKIN_LINE_RED = ‘line/red‘; const SKIN_LINE_YELLOW = ‘line/yellow‘; const SKIN_MINIMAL = ‘minimal/_all‘; const SKIN_MINIMAL_AERO = ‘minimal/aero‘; const SKIN_MINIMAL_BLUE = ‘minimal/blue‘; const SKIN_MINIMAL_GREEN = ‘minimal/green‘; const SKIN_MINIMAL_GREY = ‘minimal/grey‘; const SKIN_MINIMAL_LINE = ‘minimal/minimal‘; const SKIN_MINIMAL_ORANGE = ‘minimal/orange‘; const SKIN_MINIMAL_PINK = ‘minimal/pink‘; const SKIN_MINIMAL_PURPLE = ‘minimal/purple‘; const SKIN_MINIMAL_RED = ‘minimal/red‘; const SKIN_MINIMAL_YELLOW = ‘minimal/yellow‘; const SKIN_POLARIS = ‘polaris/polaris‘; const SKIN_SQUARE = ‘square/_all‘; const SKIN_SQUARE_AERO = ‘square/aero‘; const SKIN_SQUARE_BLUE = ‘square/blue‘; const SKIN_SQUARE_GREEN = ‘square/green‘; const SKIN_SQUARE_GREY = ‘square/grey‘; const SKIN_SQUARE_LINE = ‘square/square‘; const SKIN_SQUARE_ORANGE = ‘square/orange‘; const SKIN_SQUARE_PINK = ‘square/pink‘; const SKIN_SQUARE_PURPLE = ‘square/purple‘; const SKIN_SQUARE_RED = ‘square/red‘; const SKIN_SQUARE_YELLOW = ‘square/yellow‘; public static $skin = ‘all‘; public $basePath = ‘@webroot‘; public $baseUrl = ‘@web‘; public $css = [ ‘front-lib/icheck/skins/all.css‘, ]; public $js = [ ‘front-lib/icheck/icheck.min.js‘, ]; public $depends = [ ‘yii\web\JqueryAsset‘, ‘yii\bootstrap\BootstrapAsset‘, ]; public function registerAssetFiles($view) { parent::registerAssetFiles($view); $view->registerJs( ‘$("input").iCheck({ checkboxClass: "icheckbox_minimal-blue", radioClass: "iradio_minimal-blue", increaseArea: "20%" // optional }); $(".icheckbox_minimal-blue").css("margin-left", "-20px"); $(".iradio_minimal-blue").css("margin-left", "-20px");‘ ); } } |
2、初始化时载入指定的CSS文件:
<?php namespace backend\assets; use yii\web\AssetBundle; class ICheckAsset extends AssetBundle { public static $skin = self::SKIN_MINIMAL_BLUE; public $basePath = ‘@webroot‘; public $baseUrl = ‘@web/front-lib/icheck‘; public $depends = [ ‘yii\web\JqueryAsset‘, ‘yii\bootstrap\BootstrapAsset‘, ]; /** * @inheritdoc */ public function init() { parent::init(); $this->css = [ ‘skins/‘ . self::$skin . ‘.css‘, ]; // detect is debug mode and select uncompressed js file $jsFile = YII_DEBUG ? ‘icheck.js‘ : ‘icheck.min.js‘; $this->js = [ $jsFile, ]; } }
|
3、根据设置的样式名称初始化checkbox控件:
public function registerAssetFiles($view) { parent::registerAssetFiles($view); $cssClassSuffix = str_replace(‘/‘, ‘-‘, self::$skin); $view->registerJs( ‘$("input").iCheck({ checkboxClass: "icheckbox_‘ . $cssClassSuffix . ‘", radioClass: "iradio_‘ . $cssClassSuffix . ‘", increaseArea: "20%" // optional }); $(".icheckbox_‘ . $cssClassSuffix . ‘").css("margin-left", "-20px"); $(".iradio_‘ . $cssClassSuffix . ‘").css("margin-left", "-20px");‘ ); } |
这样,就封装好了,想要什么样式,就配置这个包里的$skin参数即可。
1.1.4 按需载入
实现上一节的支持多样式,其实同时也实现了按需载入的功能,参见下图:
1.1.5 可复用
iCheck是个很常用的前端库,前面是只将其放到了backend端,其实frontend端也很有可能会用到,因此再进一步,可以把iCheck放到框架层,使其可以更好的被复用:
1、在vendor下建立frontlib子目录,然后将icheck包拷贝进去,目录结构如下:
2、将前面实现的ICheckAsset.php也转到这个目录下(如上图);
3、打开ICheckAsset.php,修改代码:
/*public $basePath = ‘@webroot‘; public $baseUrl = ‘@web/frontlib/icheck‘;*/ public $sourcePath = ‘@vendor/frontlib/icheck‘; |
即注释掉$basePath和$baseUrl的赋值,改为对$sourcePath初始化,根据Yii文档,$basePath和$baseUrl参数是不能跟$sourcePath共存。Yii在运行时,会根据$sourcePath所指定的路径,将资源文件拷贝到assets目录下。
4、在使用iCheck资源的地方,修改代码如下:
class AppAsset extends AssetBundle { public $basePath = ‘@webroot‘; public $baseUrl = ‘@web‘; public $css = [ ‘css/site.css‘, ‘css/common.css‘, ‘css/login.css‘, ]; public $js = [ ]; public $depends = [ ‘vendor\frontlib\icheck\ICheckAsset‘, ‘yii\web\YiiAsset‘, ‘yii\bootstrap\BootstrapAsset‘, ]; } |
本文出自 “rainman” 博客,请务必保留此出处http://lancelot.blog.51cto.com/393579/1880958
Yii2 —— 实现自己的iCheck资源包