This tutorial shows how to develop check box component on an iPhone sdk

Checkbox
........\.DS_Store
__MACOSX
........\Checkbox
........\........\._.DS_Store
Checkbox\build
........\.....\Checkbox.build
........\.....\..............\Checkbox.pbxindex
........\.....\..............\.................\categories.pbxbtree
........\.....\..............\.................\cdecls.pbxbtree
........\.....\..............\.................\decls.pbxbtree
........\.....\..............\.................\files.pbxbtree
........\.....\..............\.................\imports.pbxbtree
........\.....\..............\.................\pbxindex.header
........\.....\..............\.................\protocols.pbxbtree
........\.....\..............\.................\refs.pbxbtree
........\.....\..............\.................\strings.pbxstrings
........\.....\..............\.................\..................\control
........\.....\..............\.................\..................\strings
........\.....\..............\.................\subclasses.pbxbtree
........\.....\..............\.................\symbols0.pbxsymbols
__MACOSX\Checkbox\build
........\........\.....\Checkbox.build
........\........\.....\..............\._Checkbox.pbxindex
Checkbox\build\Checkbox.build\Debug
........\.....\..............\.....\Checkbox.build
........\.....\..............\.....\..............\build-state.dat
........\.....\..............\.....\..............\build-state~.dat
........\.....\..............\.....\..............\Checkbox.dep
........\.....\..............\.....\..............\Checkbox~.dep
........\.....\..............\Debug-iphoneos
........\.....\..............\..............\Checkbox.build
........\.....\..............\..............\..............\build-state.dat
........\.....\..............\..............\..............\Checkbox.dep
........\.....\..............\Release-iphoneos
........\.....\..............\................\Checkbox.build
........\.....\..............\................\..............\build-state.dat
........\.....\..............\................\..............\Checkbox.dep
........\.....\..............\Release-iphonesimulator
........\.....\..............\.......................\Checkbox.build
........\.....\..............\.......................\..............\build-state.dat
........\.....\..............\.......................\..............\build-state~.dat
........\.....\..............\.......................\..............\Checkbox-all-target-headers.hmap
........\.....\..............\.......................\..............\Checkbox-generated-files.hmap
........\.....\..............\.......................\..............\Checkbox-own-target-headers.hmap
........\.....\..............\.......................\..............\Checkbox-project-headers.hmap
........\.....\..............\.......................\..............\Checkbox.dep
........\.....\..............\.......................\..............\Checkbox.hmap
........\.....\..............\.......................\..............\Checkbox~.dep
........\.....\..............\.......................\..............\Objects-normal
........\.....\..............\.......................\..............\..............\i386
........\.....\..............\.......................\..............\..............\....\Checkbox.LinkFileList
........\.....\..............\.......................\..............\..............\....\CheckboxAppDelegate.o
........\.....\..............\.......................\..............\..............\....\CheckboxViewController.o
........\.....\..............\.......................\..............\..............\....\main.o
__MACOSX\Checkbox\build\._Checkbox.build
Checkbox\build\Release-iphonesimulator
........\.....\.......................\Checkbox.app
........\.....\.......................\............\Checkbox
........\.....\.......................\............\checkbox-checked.png
........\.....\.......................\............\checkbox-pressed.png
........\.....\.......................\............\checkbox.png
........\.....\.......................\............\CheckboxViewController.nib
........\.....\.............

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