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<h3 id="IEnumerator-IEnumerable-越看越懵"><a href="#IEnumerator-IEnumerable-越看越懵" class="headerlink" title="IEnumerator IEnumerable 越看越懵"></a>IEnumerator IEnumerable 越看越懵</h3><p>刚接触IEnumerator的地方是在unity中有个叫协程的东西，基本作用就是执行这个协程函数，可以控制上一个表达式到下一个表达式之间的时间间隔，看到这里，觉得相当简单，用着也特舒服。但是，当我在项目中，看到大量的IEnumerator,然后又没有调用unity的协程的时候，我就傻逼了，不知道怎么办了。基于我目前对他的理解，我写下这篇博文，希望有大大可以给我指点指点。非常感谢。</p>
<h4 id="枚举器"><a href="#枚举器" class="headerlink" title="枚举器"></a>枚举器</h4><p>继承IEnumerator的类就叫做枚举器。<br>它包含：<br>MoveNext()方法<br>current属性</p>
<h4 id="可枚举类"><a href="#可枚举类" class="headerlink" title="可枚举类"></a>可枚举类</h4><p>继承IEnumerable的类就叫做可枚举类。可枚举类，都会包含一个GetEnumerator()方法，该方法会返回一个枚举器，就是上面提到的。</p>
<h4 id="小结"><a href="#小结" class="headerlink" title="小结"></a>小结</h4><p>枚举器和可枚举类的关系呢，好比是：一个人拿着一个计算器，就能方便的计算。可枚举类就是人，枚举器就是计算器，GetEnumerator()方法就是手，所以我们想要快速方便的进行计算，人，手，计算器，缺一不可。<br>话又说回来，为什么会有这两个东西。因为有一个foreach遍历，之所以foreach可以对数组进行遍历，就是因为数组是一个可枚举类，它通过一个GetEnumerator()方法，获得一个枚举器。枚举器有个current属性，代表当前值，有一个MoveNext()方法，用于遍历，当执行MoveNext(),current就往下走，代表下一个值，当下一个值存在的时候，MoveNext()返回true，否则返回false.</p>
<h4 id="例子"><a href="#例子" class="headerlink" title="例子"></a>例子</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div></pre></td><td class="code"><pre><div class="line">1.获取枚举器</div><div class="line">IEnumerator ie = Array.GetEnumerator();</div><div class="line">2.通过ie.MoveNext()遍历</div><div class="line">while(ie.MoveNext())//返回true，表示存在</div><div class="line">{</div><div class="line"> 3.通过current取值</div><div class="line"> int i = (int)ie.current;//current类型为object,可转换为任何类型</div><div class="line">}</div></pre></td></tr></table></figure>
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接口
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<h3 id="接口："><a href="#接口：" class="headerlink" title="接口："></a>接口：</h3><p>指定一组函数成员而不实现它们，是一种引用类型。只能类和结构来实现接口。</p>
<h4 id="最直观的体现："><a href="#最直观的体现：" class="headerlink" title="最直观的体现："></a>最直观的体现：</h4><p>我定义了一个函数，参数是类A，所以，理所当然，函数的功能类A可以实现，而当我们传入类B时，就不能实现了。而在这个时候，如果我们定义函数时，用的参数时一个接口的引用IO,只要类A和类B都实现了接口IO,那么这个函数就能实现这两个类的功能。</p>
<h4 id="接口是引用类型："><a href="#接口是引用类型：" class="headerlink" title="接口是引用类型："></a>接口是引用类型：</h4><p>我们不能直接通过类对象的成员访问接口，我们可以通过强制转换类型来获取指向接口的引用。有了引用，就可以使用接口引用来调用方法了。</p>
<h4 id="as运算符："><a href="#as运算符：" class="headerlink" title="as运算符："></a>as运算符：</h4><p>通过as运算符，可以很好的获取接口的引用。<br> IO io = A as IO<br>如果类A继承接口，则io != null,否则 io == null,所以as有两个步骤：1.转换。 2.检测。</p>
<h4 id="实现多个接口："><a href="#实现多个接口：" class="headerlink" title="实现多个接口："></a>实现多个接口：</h4><p>原来一样，实现对应的定义即可。</p>
<h4 id="实现有重复成员的接口："><a href="#实现有重复成员的接口：" class="headerlink" title="实现有重复成员的接口："></a>实现有重复成员的接口：</h4><p>完全相同的成员，在类中实现一个即可。</p>
<h4 id="多个接口的引用："><a href="#多个接口的引用：" class="headerlink" title="多个接口的引用："></a>多个接口的引用：</h4><p>用as获取单个接口的引用。</p>
<h4 id="接口可以继承接口："><a href="#接口可以继承接口：" class="headerlink" title="接口可以继承接口："></a>接口可以继承接口：</h4><p>继承该接口的类，同样要实现所有接口成员。</p>
<h4 id="基类继承并实现了接口，派生成员也可引用"><a href="#基类继承并实现了接口，派生成员也可引用" class="headerlink" title="基类继承并实现了接口，派生成员也可引用"></a>基类继承并实现了接口，派生成员也可引用</h4>
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MVC Design Mode
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2016-10-18
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<p><code> </code>this is my first time meet the MVC in the project.before then,i have leran the design mode.even so,i has not learn the soul of the design mode.perhaps,i don’t know the interface.this time,i not only understand the MVC, but also know what is the interface,and how to use the interface.because this blog is about the design mode,i will not say the interface.but i will write it in another blog. first,when we write the logic code about project’s UI.we will write something about the view and change the display of view.if we want to change it,should get the data.so we do three things:</p>
<pre><code>1. display view.
2. get data.
3. change the display of view.
</code></pre><h3 id="View"><a href="#View" class="headerlink" title="View"></a>View</h3><p><code> </code>now real charactor appearances, i can write a class about view who responsibles for two things:</p>
<pre><code>1. display the view.
2. given the interface about how to change the view.
</code></pre><p><code> </code>so we get the two: View.cs,IView.cs (Ps:i will use the c sharp to description.)</p>
<h3 id="Model"><a href="#Model" class="headerlink" title="Model"></a>Model</h3><p><code> </code>then,i can write the second class about model who responsibles for three things:</p>
<pre><code>1. change the data.
2. get the data.
3. given the interface bout how to get and change the model.
</code></pre><p><code> </code>in there,i can add a observer to monitor the change of model.when the data in model is changed,he will send a event message,if somewhere accept the message,then can call the function who was registed.so we get two too: Model.cs,IModel.cs</p>
<h3 id="Controller"><a href="#Controller" class="headerlink" title="Controller"></a>Controller</h3><p><code> </code>and there is a controller need to be done.the controller responses three things:</p>
<pre><code>1. add view event.
2. change model.
3. change the display by model.
</code></pre><p><code> </code>so we get one: Controller.cs</p>
<p><code> </code>We’d better have a manager to controller the panel’s jump,the one who manage all panels, or manage a system of all panels.</p>
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How to use the EventHandler<T>
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<p> today when i saw the code about our project,i discover the EventHandler<t> delegate.it’s so fun.we can define a customer class who inherits from EventArgs,we can do somethings about change the value in this class.then we declare an event of delegate type EventHandler of my customer class,when my value changed will send an event message,if somewhere accept the message,will call the function that’s registed to the event.<br> there is a quesion why my class should inherits from EventArgs?<br> because delegate type EventHandler<t> has two params(object, EventArgs),we must send an EventArgs param.<br> 1.define a class who inherits from EventArg<br> 2.declare an event<br> 3.regist an event<br> 4.trriger the event when our value changed<br><figure class="highlight cs"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div><div class="line">50</div><div class="line">51</div><div class="line">52</div><div class="line">53</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">using</span> System;</div><div class="line"><span class="keyword">using</span> System.Collections.Generic;</div><div class="line"></div><div class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title">MyEventArgs</span> : <span class="title">EventArgs</span></div><div class="line">{</div><div class="line"> <span class="keyword">private</span> <span class="keyword">string</span> msg;</div><div class="line"></div><div class="line"> <span class="function"><span class="keyword">public</span> <span class="title">MyEventArgs</span>(<span class="params"> <span class="keyword">string</span> messageData </span>) </span>{</div><div class="line"> msg = messageData;</div><div class="line"> }</div><div class="line"> <span class="keyword">public</span> <span class="keyword">string</span> Message { </div><div class="line"> <span class="keyword">get</span> { <span class="keyword">return</span> msg; } </div><div class="line"> <span class="keyword">set</span> { msg = <span class="keyword">value</span>; }</div><div class="line"> }</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title">HasEvent</span></div><div class="line">{</div><div class="line"><span class="comment">// Declare an event of delegate type EventHandler of </span></div><div class="line"><span class="comment">// MyEventArgs.</span></div><div class="line"></div><div class="line"> <span class="keyword">public</span> <span class="keyword">event</span> EventHandler<MyEventArgs> SampleEvent;</div><div class="line"></div><div class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">DemoEvent</span>(<span class="params"><span class="keyword">string</span> val</span>)</span></div><div class="line"> {</div><div class="line"> <span class="comment">// Copy to a temporary variable to be thread-safe.</span></div><div class="line"> EventHandler<MyEventArgs> temp = SampleEvent;</div><div class="line"> <span class="keyword">if</span> (temp != <span class="literal">null</span>)</div><div class="line"> temp(<span class="keyword">this</span>, <span class="keyword">new</span> MyEventArgs(val));</div><div class="line"> }</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title">Sample</span></div><div class="line">{</div><div class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">Main</span>(<span class="params"></span>)</span></div><div class="line"> {</div><div class="line"> <span class="comment">//declare event</span></div><div class="line"> HasEvent he = <span class="keyword">new</span> HasEvent();</div><div class="line"> <span class="comment">//regist event</span></div><div class="line"> he.SampleEvent += </div><div class="line"> <span class="keyword">new</span> EventHandler<MyEventArgs>(SampleEventHandler);</div><div class="line"> <span class="comment">//value change trriger event</span></div><div class="line"> he.DemoEvent(<span class="string">"Hey there, Bruce!"</span>);</div><div class="line"> he.DemoEvent(<span class="string">"How are you today?"</span>);</div><div class="line"> he.DemoEvent(<span class="string">"I'm pretty good."</span>);</div><div class="line"> he.DemoEvent(<span class="string">"Thanks for asking!"</span>);</div><div class="line"> }</div><div class="line"> <span class="comment">//this function is registed </span></div><div class="line"> <span class="function"><span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">SampleEventHandler</span>(<span class="params"><span class="keyword">object</span> src, MyEventArgs mea</span>)</span></div><div class="line"> {</div><div class="line"> Console.WriteLine(mea.Message);</div><div class="line"> }</div><div class="line">}</div></pre></td></tr></table></figure></t></t></p>
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<p>yeah,i want to say something,but now,i must to eat my lunch,so hungry~</p>
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