clock app by xcode you can see how to make it

1_AbstractClock
...............\.DS_Store
__MACOSX
........\1_AbstractClock
........\...............\._.DS_Store
1_AbstractClock\AbstractClock-Info.plist
__MACOSX\1_AbstractClock\._AbstractClock-Info.plist
1_AbstractClock\AbstractClock.xcodeproj
...............\.......................\DeArto20.mode1v3
...............\.......................\DeArto20.pbxuser
...............\.......................\DongYoonPark.mode1v3
...............\.......................\DongYoonPark.pbxuser
...............\.......................\project.pbxproj
...............\AbstractClock_Prefix.pch
...............\Classes
...............\.......\AbstractClockAppDelegate.h
__MACOSX\1_AbstractClock\Classes
........\...............\.......\._AbstractClockAppDelegate.h
1_AbstractClock\Classes\AbstractClockAppDelegate.m
__MACOSX\1_AbstractClock\Classes\._AbstractClockAppDelegate.m
1_AbstractClock\Classes\FlipsideViewController.h
__MACOSX\1_AbstractClock\Classes\._FlipsideViewController.h
1_AbstractClock\Classes\FlipsideViewController.m
__MACOSX\1_AbstractClock\Classes\._FlipsideViewController.m
1_AbstractClock\Classes\MainViewController.h
__MACOSX\1_AbstractClock\Classes\._MainViewController.h
1_AbstractClock\Classes\MainViewController.m
__MACOSX\1_AbstractClock\Classes\._MainViewController.m
1_AbstractClock\Default.png
...............\Default@2x.png
...............\FlipsideView.xib
...............\Icon114x114.png
...............\Icon57x57.png
...............\Images
...............\......\PatchCircle0.png
...............\......\PatchCircle1.png
...............\......\PatchCircle2.png
...............\......\PatchCircle3.png
...............\......\PatchCircle4.png
...............\......\PatchCircle5.png
...............\......\PatchCircle6.png
...............\......\PatchCircle7.png
...............\......\PatchCircle8.png
...............\......\PatchCircle9.png
...............\......\PatchSquare0.png
...............\......\PatchSquare1.png
...............\......\PatchSquare2.png
...............\......\PatchSquare3.png
...............\......\PatchSquare4.png
...............\......\PatchSquare5.png
...............\......\PatchSquare6.png
...............\......\PatchSquare7.png
...............\......\PatchSquare8.png
...............\......\PatchSquare9.png
...............\main.m
__MACOSX\1_AbstractClock\._main.m
1_AbstractClock\MainView.xib
...............\MainWindow.xib

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