Xcode7创建纯代码空白工程

0: Create a new project  with  'single view controller'

A: Xcode Settings

1: migrate launch image

B: Info.plist

1: delete two items: LaunchScreen(for launch),  Main(main story board) 

2: add ats item into your plist. (If you have not support https)

3: add url types white list. 

C: AppDelegate.m

1: create your screen and rootviewcontroller.