Description: Subviews draw support from the four directions around down effect, IOS programming learning source, a good reference.
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File list (Check if you may need any files):
.gitignore
Classes
.......\MWFSlideNavigationViewController.h
.......\MWFSlideNavigationViewController.m
Demo
....\en.lproj
....\........\InfoPlist.strings
....\main.m
....\MWFAppDelegate.h
....\MWFAppDelegate.m
....\MWFDemoMainViewController.h
....\MWFDemoMainViewController.m
....\MWFDemoSecondaryViewController.h
....\MWFDemoSecondaryViewController.m
....\MWFSlideNavigationViewController-Prefix.pch
....\MWFSlideNavigationViewControllerDemo-Info.plist
....\NSObject+DelayedBlock.h
....\NSObject+DelayedBlock.m
MWFSlideNavigationViewController.xcodeproj
..........................................\project.pbxproj
README.mdown
ViewCell.xib