时间：2021-07-01 10:21:17 帮助过：2人阅读
继续了解controller基类。
/** * Runs a request specified in terms of a route.在路径中指定的请求。 * The route can be either an ID of an action within this controller or a complete route consisting * of module IDs, controller ID and action ID. If the route starts with a slash '/', the parsing of * the route will start from the application; otherwise, it will start from the parent module of this controller. * 该路径可以是控制器内的一个动作的标识，或由模块标识、控制器标识和动作标识组成的一个完整路径。 * 如果该路径从一个“/”开始，该路径的解析将从应用程序开始；否则，它将从该控制器的父模块开始。 * @param string $route the route to be handled, e.g., 'view', 'comment/view', '/admin/comment/view'. * @param array $params the parameters to be passed to the action. * @return mixed the result of the action. * @see runAction() */ public function run($route, $params = []) { $pos = strpos($route, '/'); if ($pos === false) {//判断是否以“/”开始 是则解析从应用程序开始；否则，它将从该控制器的父模块开始。 return $this->runAction($route, $params); } elseif ($pos > 0) { return $this->module->runAction($route, $params); } else { return Yii::$app->runAction(ltrim($route, '/'), $params); } } /** * Binds the parameters to the action.将参数绑定到动作标识。 * This method is invoked by [[Action]] when it begins to run with the given parameters. * 运行给定的参数时，该方法被调用。 * @param Action $action the action to be bound with parameters.参数约束的操作。 * @param array $params the parameters to be bound to the action.要约束的参数。 * @return array the valid parameters that the action can run with.可以运行的有效参数。 */ public function bindActionParams($action, $params) { return []; } /** * Creates an action based on the given action ID. 根据给定的操作标识创建一个action。 * The method first checks if the action ID has been declared in [[actions()]]. If so, * it will use the configuration declared there to create the action object. * If not, it will look for a controller method whose name is in the format of `actionXyz` * where `Xyz` stands for the action ID. If found, an [[InlineAction]] representing that * method will be created and returned. * 该方法首先检查动作标识是否在 [[actions()]]设置，如果是将使用配置声明来创建操作对象。 * 如果不是，它会寻找控制器方法`Xyz` 的 `actionXyz`作为动作标识，调用[[InlineAction]]方法创建对象 * @param string $id the action ID. * @return Action the newly created action instance. Null if the ID doesn't resolve into any action. */ public function createAction($id) { if ($id === '') { // 如果action的id为空，就是用默认的action $id = $this->defaultAction; } $actionMap = $this->actions();// 获取actions方法中的定义的actionMap if (isset($actionMap[$id])) { // 如果操作标识在actionMap中，就去创建这个action return Yii::createObject($actionMap[$id], [$id, $this]); } elseif (preg_match('/^[a-z0-9\\-_]+$/', $id) && strpos($id, '--') === false && trim($id, '-') === $id) { // 如果id符合命名规范，而且两边不存在- // 用于拼接controller类名类似的方法拼接action方法的名称 $methodName = 'action' . str_replace(' ', '', ucwords(implode(' ', explode('-', $id)))); if (method_exists($this, $methodName)) { // 如果方法存在，就实例化 $method = new \ReflectionMethod($this, $methodName); if ($method->isPublic() && $method->getName() === $methodName) { // 如果方法是public的，就new一个InlineAction返回 return new InlineAction($id, $this, $methodName); } } } return null; } /** * This method is invoked right before an action is executed. * 在执行操作之前调用此方法。 * The method will trigger the [[EVENT_BEFORE_ACTION]] event. The return value of the method * will determine whether the action should continue to run. * 方法将触发 [[EVENT_BEFORE_ACTION]] 事件，返回值确定该操作是否执行 * If you override this method, your code should look like the following: * * ```php * public function beforeAction($action) * { * if (parent::beforeAction($action)) { * // your custom code here * return true; // or false if needed * } else { * return false; * } * } * ``` * * @param Action $action the action to be executed. 执行的操作 * @return boolean whether the action should continue to run.确定操作是否应该继续运行。 */ public function beforeAction($action) { $event = new ActionEvent($action); $this->trigger(self::EVENT_BEFORE_ACTION, $event); return $event->isValid; } /** * This method is invoked right after an action is executed. * 在执行操作之后调用此方法。 * The method will trigger the [[EVENT_AFTER_ACTION]] event. The return value of the method * will be used as the action return value. * * If you override this method, your code should look like the following: * * ```php * public function afterAction($action, $result) * { * $result = parent::afterAction($action, $result); * // your custom code here * return $result; * } * ``` * * @param Action $action the action just executed. 刚刚执行的操作。 * @param mixed $result the action return result. 操作返回值 * @return mixed the processed action result. 处理结果。 */ public function afterAction($action, $result) { $event = new ActionEvent($action); $event->result = $result; $this->trigger(self::EVENT_AFTER_ACTION, $event); return $event->result; } /** * Returns all ancestor modules of this controller. 获取当前控制器所有的父模块 * The first module in the array is the outermost one (i.e., the application instance), * while the last is the innermost one. * 数组中的第一个模块是最外层的一个，最后一个模块是最内层的。 * @return Module[] all ancestor modules that this controller is located within.当前控制器所有的父模块 */ public function getModules() { // 当前controller的module组成的数组 $modules = [$this->module]; $module = $this->module; while ($module->module !== null) { // 将外面的module插入到modules数组的开头 array_unshift($modules, $module->module); $module = $module->module; } return $modules; } /** * @return string the controller ID that is prefixed with the module ID (if any). * 返回控制器id */ public function getUniqueId() { //如果当前所属模块为application，则就为当前id,否则要面要加上模块id return $this->module instanceof Application ? $this->id : $this->module->getUniqueId() . '/' . $this->id; } /** * Returns the route of the current request. 获取默认请求的路由信息 * @return string the route (module ID, controller ID and action ID) of the current request. * 当前请求的路由（模块标识、控制器标识和操作标识） */ public function getRoute() { return $this->action !== null ? $this->action->getUniqueId() : $this->getUniqueId(); } /** * Renders a view and applies layout if available. * 如果有布局渲染视图文件和布局文件 * The view to be rendered can be specified in one of the following formats: * * - path alias (e.g. "@app/views/site/index"); * - absolute path within application (e.g. "//site/index"): the view name starts with double slashes. * The actual view file will be looked for under the [[Application::viewPath|view path]] of the application. * - absolute path within module (e.g. "/site/index"): the view name starts with a single slash. * The actual view file will be looked for under the [[Module::viewPath|view path]] of [[module]]. * - relative path (e.g. "index"): the actual view file will be looked for under [[viewPath]]. * * To determine which layout should be applied, the following two steps are conducted: * 确定应用布局文件类型的步骤： * 1. In the first step, it determines the layout name and the context module: * 首先确定布局文件名和背景模块 * - If [[layout]] is specified as a string, use it as the layout name and [[module]] as the context module; * - If [[layout]] is null, search through all ancestor modules of this controller and find the first * module whose [[Module::layout|layout]] is not null. The layout and the corresponding module * are used as the layout name and the context module, respectively. If such a module is not found * or the corresponding layout is not a string, it will return false, meaning no applicable layout. * 如果布局文件是字符串，也就是设置布局文件，则直接调用。 如果没有设置布局文件，则查找所有的父模块的布局文件。 * 2. In the second step, it determines the actual layout file according to the previously found layout name * and context module. The layout name can be: * 应用下的布局文件，以“/”开头，这个会从应用程序的布局文件目录下面查找布局文件 * - a path alias (e.g. "@app/views/layouts/main"); * - an absolute path (e.g. "/main"): the layout name starts with a slash. The actual layout file will be * looked for under the [[Application::layoutPath|layout path]] of the application; * - a relative path (e.g. "main"): the actual layout file will be looked for under the * [[Module::layoutPath|layout path]] of the context module. * * If the layout name does not contain a file extension, it will use the default one `.php`. * 如果布局文件没有扩展名，则默认为.php * @param string $view the view name. * @param array $params the parameters (name-value pairs) that should be made available in the view. * These parameters will not be available in the layout. * @return string the rendering result. * @throws InvalidParamException if the view file or the layout file does not exist. */ public function render($view, $params = []) { //由view对象渲染视图文件 $content = $this->getView()->render($view, $params, $this); return $this->renderContent($content);//渲染布局文件 } /** * Renders a static string by applying a layout. 配合render方法渲染布局文件 * @param string $content the static string being rendered 被渲染的静态字符串 * @return string the rendering result of the layout with the given static string as the `$content` variable. * If the layout is disabled, the string will be returned back. * 以给定的静态字符串作为“$content”变量布局的渲染结果。如果布局被禁用，将返回该字符串。 * @since 2.0.1 */ public function renderContent($content) { $layoutFile = $this->findLayoutFile($this->getView()); //查找布局文件 if ($layoutFile !== false) {//由view对象渲染布局文件，并把上视图结果作为content变量传递到布局中， return $this->getView()->renderFile($layoutFile, ['content' => $content], $this); } else { return $content; } } /** * Renders a view without applying layout.渲染视图文件不应用布局 * This method differs from [[render()]] in that it does not apply any layout. * 这种方法不同于[[render()]]，它不使用任何布局。 * @param string $view the view name. Please refer to [[render()]] on how to specify a view name. * 视图名称。根据[[render()]]指定一个视图名称。 * @param array $params the parameters (name-value pairs) that should be made available in the view. * 在视图中提供的参数(name-value pairs) * @return string the rendering result.渲染结果。 * @throws InvalidParamException if the view file does not exist.如果视图文件不存在，抛出异常 */ public function renderPartial($view, $params = []) { return $this->getView()->render($view, $params, $this); } /** * Renders a view file. 渲染一个文件 * @param string $file the view file to be rendered. This can be either a file path or a path alias. * 要呈现的视图文件。可以是一个文件路径或路径别名。 * @param array $params the parameters (name-value pairs) that should be made available in the view. * 在视图中提供的参数(name-value pairs) * @return string the rendering result.渲染结果 * @throws InvalidParamException if the view file does not exist.如果视图文件不存在，抛出异常 */ public function renderFile($file, $params = []) { return $this->getView()->renderFile($file, $params, $this); } /** * Returns the view object that can be used to render views or view files. * 返回渲染视图或视图文件的view对象。 * The [[render()]], [[renderPartial()]] and [[renderFile()]] methods will use * this view object to implement the actual view rendering. * [[render()]], [[renderPartial()]] and [[renderFile()]] 方法将使用视图对象实现视图显示。 * If not set, it will default to the "view" application component.如果未设置，则默认为“view”应用程序组件。 * @return View|\yii\web\View the view object that can be used to render views or view files. * 渲染视图或视图文件的view对象。 */ public function getView() { if ($this->_view === null) { $this->_view = Yii::$app->getView(); } return $this->_view; } /** * Sets the view object to be used by this controller. * @param View|\yii\web\View $view the view object that can be used to render views or view files. */ public function setView($view) { $this->_view = $view; } /** * Returns the directory containing view files for this controller.返回该控制器包含视图文件的目录。 * The default implementation returns the directory named as controller [[id]] under the [[module]]'s * [[viewPath]] directory.默认返回目录命名为控制器[[id]] 下的 [[module]]的[[viewPath]]目录。 * @return string the directory containing the view files for this controller. * 包含此控制器的视图文件的目录。 */ public function getViewPath() { return $this->module->getViewPath() . DIRECTORY_SEPARATOR . $this->id; } /** * Finds the applicable layout file.查找适用的布局文件。 * @param View $view the view object to render the layout file.呈现布局文件视图对象。 * @return string|boolean the layout file path, or false if layout is not needed. * Please refer to [[render()]] on how to specify this parameter. * 布局文件路径，或者不需要布局。参阅[[render()]]如何指定此参数。 * @throws InvalidParamException if an invalid path alias is used to specify the layout. * 如果使用了无效的路径别名指定布局。抛出异常 */ public function findLayoutFile($view) { $module = $this->module; if (is_string($this->layout)) { //如果当前控制器设置了布局文件，则直接使用所设置的布局文件 $layout = $this->layout; } elseif ($this->layout === null) { //如果没有设置布局文件，查找所有的父模块的布局文件。 while ($module !== null && $module->layout === null) { $module = $module->module; } if ($module !== null && is_string($module->layout)) { $layout = $module->layout; } } if (!isset($layout)) { return false;//如果没有设置布局文件，返回false } if (strncmp($layout, '@', 1) === 0) { $file = Yii::getAlias($layout);//以“@”开头，会在别名路径中查找布局文件 } elseif (strncmp($layout, '/', 1) === 0) {//以“/”开头，会从应用程序的布局文件目录下面查找布局文件 $file = Yii::$app->getLayoutPath() . DIRECTORY_SEPARATOR . substr($layout, 1); } else {//从当前模块的布局文件目录下查找布局文件 $file = $module->getLayoutPath() . DIRECTORY_SEPARATOR . $layout; } if (pathinfo($file, PATHINFO_EXTENSION) !== '') { return $file;//如果布局文件有文件扩展名，返回文件 } $path = $file . '.' . $view->defaultExtension;//拼接默认的文件扩展名。 if ($view->defaultExtension !== 'php' && !is_file($path)) { $path = $file . '.php';//如果文件不存在，并且，默认的文件扩展名也不是php，则加上.php作为扩展名。 } return $path; }
http://www.bkjia.com/PHPjc/1131876.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/1131876.htmlTechArticleyii2源码学习笔记(十二），yii2源码学习笔记 继续了解controller基类。 /* * * Runs a request specified in terms of a route.在路径中指定的请求。 * The r...