ipad top with a pop-up password input panel, selected ios learning programming source, a good reference.

ABLockScreen
............\ABPadLockScreen.h
............\ABPadLockScreen.m
............\Assets
............\......\.DS_Store
............\......\0-selected.png
............\......\0.png
............\......\1-selected.png
............\......\1.png
............\......\2-selected.png
............\......\2.png
............\......\3-selected.png
............\......\3.png
............\......\4-selected.png
............\......\4.png
............\......\5-selected.png
............\......\5.png
............\......\6-selected.png
............\......\6.png
............\......\7-selected.png
............\......\7.png
............\......\8-selected.png
............\......\8.png
............\......\9-selected.png
............\......\9.png
............\......\background.png
............\......\blank.png
............\......\clear-selected.png
............\......\clear.png
............\......\close.png
............\......\error-box.png
............\......\input.png
ABPadLockScreenDemo
...................\.DS_Store
...................\ABPadLockScreen
...................\ABPadLockScreen.xcodeproj
...................\.........................\project.pbxproj
...................\.........................\project.xcworkspace
...................\.........................\...................\contents.xcworkspacedata
...................\.........................\...................\xcuserdata
...................\.........................\...................\..........\abury.xcuserdatad
...................\.........................\...................\..........\.................\UserInterfaceState.xcuserstate
...................\.........................\...................\..........\aron.xcuserdatad
...................\.........................\...................\..........\................\UserInterfaceState.xcuserstate
...................\.........................\xcuserdata
...................\.........................\..........\abury.xcuserdatad
...................\.........................\..........\.................\xcschemes
...................\.........................\..........\.................\.........\ABPadLockScreen.xcscheme
...................\.........................\..........\.................\.........\xcschememanagement.plist
...................\.........................\..........\aron.xcuserdatad
...................\.........................\..........\................\xcschemes
...................\.........................\..........\................\.........\ABPadLockScreen.xcscheme
...................\.........................\..........\................\.........\xcschememanagement.plist
...................\...............\ABPadLockScreen-Info.plist
...................\...............\ABPadLockScreen-Prefix.pch
...................\...............\ABPadLockScreen.h
...................\...............\ABPadLockScreen.m
...................\...............\ABPadLockScreenAppDelegate.h
...................\...............\ABPadLockScreenAppDelegate.m
...................\...............\Assets
...................\...............\......\.DS_Store
...................\...............\......\0-selected.png
...................\...............\......\0.png
...................\...............\......\1-selected.png
...................\...............\......\1.png
...................\...............\......\2-selected.png
...................\...............\......\2.png
...................\...............\......\3-selected.png
...................\...............\......\3.png
...................\...............\......\4-selected.png
...................\...............\......\4.png
...................\...............\......\5-selected.png
...................\...............\......\5.png
...................\...............\......\6-selected.png
...................\...............\......\6.png
...................\...............\......\7-selected.png
...................\...............\......\7.png
...................\...............\......\8-selected.png
...................\...............\......\8.png
...................\.....

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