And the silence of the switch is iOS, select learning IOS programming source code, a good reference.

VSSilentSwitch
..............\.DS_Store
..............\headers
..............\.......\VSSilentSwitch.h
..............\lib
..............\...\VSSilentSwitch-iOS-1.0.a
..............\VSSilentSwitchDemo
..............\VSSilentSwitchDemo.xcodeproj
..............\............................\project.pbxproj
..............\............................\project.xcworkspace
..............\............................\...................\contents.xcworkspacedata
..............\............................\...................\xcuserdata
..............\............................\...................\..........\josh.xcuserdatad
..............\............................\...................\..........\................\UserInterfaceState.xcuserstate
..............\............................\xcuserdata
..............\............................\..........\josh.xcuserdatad
..............\............................\..........\................\xcdebugger
..............\............................\..........\................\..........\Breakpoints.xcbkptlist
..............\............................\..........\................\xcschemes
..............\............................\..........\................\.........\VSSilentSwitchDemo.xcscheme
..............\............................\..........\................\.........\xcschememanagement.plist
..............\..................\AppDelegate.h
..............\..................\AppDelegate.m
..............\..................\en.lproj
..............\..................\........\InfoPlist.strings
..............\..................\........\ViewController_iPad.xib
..............\..................\........\ViewController_iPhone.xib
..............\..................\main.m
..............\..................\ViewController.h
..............\..................\ViewController.m
..............\..................\VSSilentSwitchDemo-Info.plist
..............\..................\VSSilentSwitchDemo-Prefix.pch
__MACOSX
........\VSSilentSwitch
........\..............\._.DS_Store
........\..............\headers
........\..............\.......\._VSSilentSwitch.h
........\..............\VSSilentSwitchDemo
........\..............\..................\._AppDelegate.h
........\..............\..................\._AppDelegate.m
........\..............\..................\._main.m
........\..............\..................\._ViewController.h
........\..............\..................\._ViewController.m
........\..............\..................\._VSSilentSwitchDemo-Prefix.pch
........\..............\..................\en.lproj
........\..............\..................\........\._InfoPlist.strings

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