今天学习Psychologist
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遇到的一个问题是，Xcode生成的ViewController class name is "ViewController", I want change it to "PsychologistController", this can be done by:
1. click on the class name (in the source code)
2. edit->refactor->rename
then another problem is, the storyboard can't connect to the new named controller,
need to change the customer class in the story board editor:
as desribed in:
http://stackoverflow.com/questions/19370208/how-to-connect-storyboard-to-viewcontroller
Choose your view controller in the list of scenes on the left side.
2. Choose the Identify Inspector on the right side.
3. Choose the custom view controller class from the Class list.
