Realize the multilayer tree menu, click a menu, menu will expand down time. Easy to code extension.

BDDynamicTree-master
....................\.DS_Store
__MACOSX
........\BDDynamicTree-master
........\....................\._.DS_Store
BDDynamicTree-master\BDDynamicTree
....................\.............\BDDynamicTree.h
__MACOSX\BDDynamicTree-master\BDDynamicTree
........\....................\.............\._BDDynamicTree.h
BDDynamicTree-master\BDDynamicTree\BDDynamicTree.m
__MACOSX\BDDynamicTree-master\BDDynamicTree\._BDDynamicTree.m
BDDynamicTree-master\BDDynamicTree\BDDynamicTreeCell.h
__MACOSX\BDDynamicTree-master\BDDynamicTree\._BDDynamicTreeCell.h
BDDynamicTree-master\BDDynamicTree\BDDynamicTreeCell.m
__MACOSX\BDDynamicTree-master\BDDynamicTree\._BDDynamicTreeCell.m
BDDynamicTree-master\BDDynamicTree\BDDynamicTreeCell.xib
__MACOSX\BDDynamicTree-master\BDDynamicTree\._BDDynamicTreeCell.xib
BDDynamicTree-master\BDDynamicTree\BDDynamicTreeNode.h
__MACOSX\BDDynamicTree-master\BDDynamicTree\._BDDynamicTreeNode.h
BDDynamicTree-master\BDDynamicTree\BDDynamicTreeNode.m
__MACOSX\BDDynamicTree-master\BDDynamicTree\._BDDynamicTreeNode.m
........\....................\._BDDynamicTree
BDDynamicTree-master\BDDynamicTree.xcworkspace
....................\.........................\contents.xcworkspacedata
__MACOSX\BDDynamicTree-master\BDDynamicTree.xcworkspace
........\....................\.........................\._contents.xcworkspacedata
BDDynamicTree-master\BDDynamicTree.xcworkspace\xcuserdata
....................\.........................\..........\ericwang.xcuserdatad
....................\.........................\..........\....................\UserInterfaceState.xcuserstate
....................\.........................\..........\gaoruiqiang.xcuserdatad
....................\.........................\..........\.......................\UserInterfaceState.xcuserstate
__MACOSX\BDDynamicTree-master\BDDynamicTree.xcworkspace\xcuserdata
........\....................\.........................\..........\gaoruiqiang.xcuserdatad
........\....................\.........................\..........\.......................\._UserInterfaceState.xcuserstate
........\....................\.........................\..........\._gaoruiqiang.xcuserdatad
........\....................\.........................\._xcuserdata
........\....................\._BDDynamicTree.xcworkspace
BDDynamicTree-master\BDDynamicTreeDemo
....................\.................\BDDynamicTreeDemo
....................\.................\.................\Base.lproj
....................\.................\.................\..........\Main_iPad.storyboard
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo
........\....................\.................\BDDynamicTreeDemo
........\....................\.................\.................\Base.lproj
........\....................\.................\.................\..........\._Main_iPad.storyboard
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\Base.lproj\Main_iPhone.storyboard
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\Base.lproj\._Main_iPhone.storyboard
........\....................\.................\.................\._Base.lproj
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\BDAppDelegate.h
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\._BDAppDelegate.h
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\BDAppDelegate.m
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\._BDAppDelegate.m
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\BDDynamicTreeDemo-Info.plist
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\._BDDynamicTreeDemo-Info.plist
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\BDDynamicTreeDemo-Prefix.pch
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\._BDDynamicTreeDemo-Prefix.pch
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\BDViewController.h
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\._BDViewController.h
BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeDemo\BDViewController.m
__MACOSX\BDDynamicTree-master\BDDynamicTreeDemo\BDDynamicTreeD

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