单选题

<pre class="prettyprint lang-cpp"> UIVi

Question

  UIViewController在显示过程中，各个方法的调用顺序是

A. init-&gtviewDidLoad-&gtviewDidAppear-&gtviewDidUnload

B. init-&gtviewDidAppear-&gtviewDidLoad-&gtviewDidUnload

C. init-&gtviewDidLoad-&gtviewDidUnload -&gtviewDidAppear

D. init-&gtviewDidAppear-&gtviewDidUnload-&gtviewDidLoad