前端组件调整，剔除无用文件

app/controller/admin/Index.php

@@ -35,12 +35,27 @@ class Index extends Admin{
 	 */
 	public function clear(){
 		if ($this->request->isAjax()) {
-			# code...
-		}else{
-			return $this->data;
+			$root = app()->getRootPath() . 'runtime/';
+			$this->delDirAndFile($root);
+			return $this->success('更新成功！');
 		}
 	}
 
+    /** 递归删除文件
+     * @param $dirName
+     * @param bool $subdir
+     */
+    protected function delDirAndFile($dirName)
+    {
+        $list = glob($dirName . '*');
+        foreach ($list as $file) {
+            if (is_dir($file))
+                $this->delDirAndFile($file . '/');
+            else
+                @unlink($file);
+        }
+        @rmdir($dirName);
+    }
 	/**
 	 * @title 后台登录
 	 */