The DM rolling code named iOS, select IOS to learn programming source code, a good reference.

DMScrollingTicker
.................\.DS_Store
.................\DMScrollingTicker.xcodeproj
.................\...........................\project.pbxproj
.................\...........................\project.xcworkspace
.................\...........................\...................\contents.xcworkspacedata
.................\...........................\...................\xcuserdata
.................\...........................\...................\..........\malcom.xcuserdatad
.................\...........................\...................\..........\..................\UserInterfaceState.xcuserstate
.................\...........................\...................\..........\..................\WorkspaceSettings.xcsettings
.................\...........................\xcuserdata
.................\...........................\..........\malcom.xcuserdatad
.................\...........................\..........\..................\xcdebugger
.................\...........................\..........\..................\..........\Breakpoints.xcbkptlist
.................\...........................\..........\..................\xcschemes
.................\...........................\..........\..................\.........\DMScrollingTicker.xcscheme
.................\...........................\..........\..................\.........\xcschememanagement.plist
.................\test
.................\....\DMScrollingTicker-Info.plist
.................\....\DMScrollingTicker-Prefix.pch
.................\....\DMScrollingTicker.h
.................\....\DMScrollingTicker.m
.................\....\en.lproj
.................\....\........\InfoPlist.strings
.................\....\........\RSViewController.xib
.................\....\main.m
.................\....\RSAppDelegate.h
.................\....\RSAppDelegate.m
.................\....\RSViewController.h
.................\....\RSViewController.m
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