摘要： XCode 4.2.1 项目的模版截图：Single View ApplicationThis template provides a starting point for an application that uses a single view. It provides a view controller to manage the view, and a storyboard or nib file that contains the view.最常用的应用模版，XCode 之前版本的 View－Based Application 跟这个最像。刚开始学习HelloWorld 就应该从这 阅读全文