Cool the popup menu, select learning IOS programming source code, a good reference.

Classes
.......\Popover
.......\.......\UIBarButtonItem+WEPopover.h
.......\.......\UIBarButtonItem+WEPopover.m
.......\.......\WEPopoverContainerView.h
.......\.......\WEPopoverContainerView.m
.......\.......\WEPopoverController.h
.......\.......\WEPopoverController.m
.......\.......\WEPopoverParentView.h
.......\.......\WETouchableView.h
.......\.......\WETouchableView.m
.......\WEPopoverAppDelegate.h
.......\WEPopoverAppDelegate.m
.......\WEPopoverContentViewController.h
.......\WEPopoverContentViewController.m
.......\WEPopoverTableViewController.h
.......\WEPopoverTableViewController.m
.......\WEPopoverViewController.h
.......\WEPopoverViewController.m
LICENSE
main.m
MainWindow.xib
popoverArrowDown.png
popoverArrowDown@2x.png
popoverArrowDownSimple.png
popoverArrowLeft.png
popoverArrowLeft@2x.png
popoverArrowLeftSimple.png
popoverArrowRight.png
popoverArrowRight@2x.png
popoverArrowRightSimple.png
popoverArrowUp.png
popoverArrowUp@2x.png
popoverArrowUpSimple.png
popoverBg.png
popoverBg@2x.png
popoverBgSimple.png
README
WEPopover-Info.plist
WEPopover.xcodeproj
...................\project.pbxproj
WEPopoverViewController.xib
WEPopover_Prefix.pch

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