Basics of Veiw

A View is an ERb program that shares data with Controllers through mutually accessible Variables. 首先，view是一个ERb程序。然后，View同Controller共享数据（通过Variable）。

Controller actions and View template files are connected through naming conventions:
An incoming request for the picture/display Action triggers execution of the display method in the picture Controller, followed by rendering of the picture/display.rhtml file in the Views area.

Basicly, the Controller prepares the data and stores it in Variables, and those Variables are used in the ERb file corresponding to that Action.