Quartz2D basic function display, draw lines, draw a rectangle, drawing

QuartzDemo
..........\.DS_Store
__MACOSX
........\QuartzDemo
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QuartzDemo\build
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__MACOSX\QuartzDemo\build
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........\..........\.....\.....................\QuartzDemo.app
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj
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__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\DashView.nib
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\DemoView.nib
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\GradientView.nib
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\LineView.nib
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\MainWindow.nib
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\PolyView.nib
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\._PolyView.nib
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\Quartz.pdf
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\en.lproj\._Quartz.pdf
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Icon-72.png
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._Icon-72.png
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Icon-Small-50.png
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._Icon-Small-50.png
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Icon-Small.png
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._Icon-Small.png
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Icon-Small@2x.png
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._Icon-Small@2x.png
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Icon.png
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._Icon.png
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Icon@2x.png
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\Info.plist
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\iTunesArtwork
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\PkgInfo
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._PkgInfo
QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\QuartzDemo
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__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app\._Ship.png
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QuartzDemo\build\Debug-iphonesimulator\QuartzDemo.app.dSYM
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..........\.....\.....................\...................\........\.........\.....\QuartzDemo
__MACOSX\QuartzDemo\build\Debug-iphonesimulator\QuartzDem

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