YII 的源码分析(二)

    <span>public</span> <span>function</span><span> actionPlay()
    {
        </span><span>static</span> <span>$levels</span>=<span>array</span><span>(
            </span>'10'=>'Easy game; you are allowed 10 misses.',
            '5'=>'Medium game; you are allowed 5 misses.',
            '3'=>'Hard game; you are allowed 3 misses.',<span>
        );

        </span><span>//</span><span> if a difficulty level is correctly chosen</span>
        <span>if</span>(<span>isset</span>(<span>$_POST</span>['level']) && <span>isset</span>(<span>$levels</span>[<span>$_POST</span>['level'<span>]]))
        {
            </span><span>$this</span>->word=<span>$this</span>-><span>generateWord();
            </span><span>$this</span>->guessWord=<span>str_repeat</span>('_',<span>strlen</span>(<span>$this</span>-><span>word));
            </span><span>$this</span>->level=<span>$_POST</span>['level'<span>];
            </span><span>$this</span>->misses=0<span>;
            </span><span>$this</span>->setPageState('guessed',<span>null</span><span>);
            </span><span>//</span><span> show the guess page</span>
            <span>$this</span>->render('guess'<span>);
        }
        </span><span>else</span><span>
        {
            </span><span>$params</span>=<span>array</span><span>(
                </span>'levels'=><span>$levels</span>,
                <span>//</span><span> if this is a POST request, it means the level is not chosen</span>
                'error'=>Yii::app()->request->isPostRequest,<span>
            );
            </span><span>//</span><span> show the difficulty level page</span>
            <span>$this</span>->render('play',<span>$params</span><span>);
        }
    }</span>

<span>显然走的是else的逻辑，重点请看</span> $this->render('play',$params); 这个render方法这么面熟，很多框架中都有类似的方法，比如discuz,smarty,CI 等等. 纵观yii框架，rnder 在它整个MVC模式中，是V得以实现的重要骨干。所以有必要把它翻个底朝天。<br />在CController.php中有这个方法：

    <span>public</span> <span>function</span> render(<span>$view</span>,<span>$data</span>=<span>null</span>,<span>$return</span>=<span>false</span><span>)
    {
        </span><span>if</span>(<span>$this</span>->beforeRender(<span>$view</span><span>))
        {
            </span><span>$output</span>=<span>$this</span>->renderPartial(<span>$view</span>,<span>$data</span>,<span>true</span><span>);
            </span><span>if</span>((<span>$layoutFile</span>=<span>$this</span>->getLayoutFile(<span>$this</span>->layout))!==<span>false</span><span>)
                </span><span>$output</span>=<span>$this</span>->renderFile(<span>$layoutFile</span>,<span>array</span>('content'=><span>$output</span>),<span>true</span><span>);

            </span><span>$this</span>->afterRender(<span>$view</span>,<span>$output</span><span>);

            </span><span>$output</span>=<span>$this</span>->processOutput(<span>$output</span><span>);

            </span><span>if</span>(<span>$return</span><span>)
                </span><span>return</span> <span>$output</span><span>;
            </span><span>else</span>
                <span>echo</span> <span>$output</span><span>;
        }
    }</span>

<br />