PieView pie chart, select learning IOS programming source code, a good reference.

DrawTest
........\ CLMView.h
........\ CLMView.m
........\build
........\.....\Debug-iphoneos
........\.....\..............\DrawTest.app
........\.....\..............\DrawTest.app.dSYM
........\.....\..............\.................\Contents
........\.....\..............\.................\........\Info.plist
........\.....\..............\.................\........\Resources
........\.....\..............\.................\........\.........\DWARF
........\.....\..............\.................\........\.........\.....\DrawTest
........\.....\..............\............\CodeResources
........\.....\..............\............\DrawTest
........\.....\..............\............\embedded.mobileprovision
........\.....\..............\............\Info.plist
........\.....\..............\............\MainWindow.nib
........\.....\..............\............\PkgInfo
........\.....\..............\............\ResourceRules.plist
........\.....\..............\............\RootViewController.nib
........\.....\..............\............\_CodeSignature
........\.....\..............\............\..............\CodeResources
........\.....\Debug-iphonesimulator
........\.....\.....................\DrawTest.app
........\.....\.....................\DrawTest.app.dSYM
........\.....\.....................\.................\Contents
........\.....\.....................\.................\........\Info.plist
........\.....\.....................\.................\........\Resources
........\.....\.....................\.................\........\.........\DWARF
........\.....\.....................\.................\........\.........\.....\DrawTest
........\.....\.....................\............\DrawTest
........\.....\.....................\............\Info.plist
........\.....\.....................\............\MainWindow.nib
........\.....\.....................\............\PkgInfo
........\.....\.....................\............\RootViewController.nib
........\.....\DrawTest.build
........\.....\..............\Debug-iphoneos
........\.....\..............\..............\DrawTest.build
........\.....\..............\..............\..............\DrawTest-all-target-headers.hmap
........\.....\..............\..............\..............\DrawTest-generated-files.hmap
........\.....\..............\..............\..............\DrawTest-own-target-headers.hmap
........\.....\..............\..............\..............\DrawTest-project-headers.hmap
........\.....\..............\..............\..............\DrawTest.dep
........\.....\..............\..............\..............\DrawTest.hmap
........\.....\..............\..............\..............\DrawTest.xcent
........\.....\..............\..............\..............\Objects-normal
........\.....\..............\..............\..............\..............\armv6
........\.....\..............\..............\..............\..............\.....\CLMView.o
........\.....\..............\..............\..............\..............\.....\DrawTest.LinkFileList
........\.....\..............\..............\..............\..............\.....\DrawTestAppDelegate.o
........\.....\..............\..............\..............\..............\.....\main.o
........\.....\..............\..............\..............\..............\.....\RootViewController.o
........\.....\..............\Debug-iphonesimulator
........\.....\..............\.....................\DrawTest.build
........\.....\..............\.....................\..............\DrawTest-all-target-headers.hmap
........\.....\..............\.....................\..............\DrawTest-generated-files.hmap
........\.....\..............\.....................\..............\DrawTest-own-target-headers.hmap
........\.....\..............\.....................\..............\DrawTest-project-headers.hmap
........\.....\..............\.....................\..............\DrawTest.dep
........\.....\..............\.....................\..............\DrawTest.hmap
........\.....\..............\.....................\..............\DrawTest~.dep

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