Explain the the ios KVC characteristics, according to kvc characteristics to the scroll bar to add a picture.

ScrollView
..........\.svn
..........\....\all-wcprops
..........\....\entries
..........\....\lock
..........\....\prop-base
..........\....\.........\IMG_0066.PNG.svn-base
..........\....\props
..........\....\text-base
..........\....\.........\IMG_0066.PNG.svn-base
..........\....\.........\LZHAppDelegate.h.svn-base
..........\....\.........\LZHAppDelegate.m.svn-base
..........\....\.........\LZHViewController.h.svn-base
..........\....\.........\LZHViewController.m.svn-base
..........\....\.........\ScrollViewKVC-Info.plist.svn-base
..........\....\.........\ScrollViewKVC-Prefix.pch.svn-base
..........\....\.........\main.m.svn-base
..........\....\.........\璇存槑鏂囨。.strings.svn-base
..........\....\tmp
..........\....\...\prop-base
..........\....\...\props
..........\....\...\text-base
..........\IMG_0066.PNG
..........\LZHAppDelegate.h
..........\LZHAppDelegate.m
..........\LZHViewController.h
..........\LZHViewController.m
..........\ScrollViewKVC-Info.plist
..........\ScrollViewKVC-Prefix.pch
..........\en.lproj
..........\........\.svn
..........\........\....\all-wcprops
..........\........\....\entries
..........\........\....\lock
..........\........\....\prop-base
..........\........\....\props
..........\........\....\text-base
..........\........\....\.........\InfoPlist.strings.svn-base
..........\........\....\.........\LZHViewController.xib.svn-base
..........\........\....\tmp
..........\........\....\...\prop-base
..........\........\....\...\props
..........\........\....\...\text-base
..........\........\InfoPlist.strings
..........\........\LZHViewController.xib
..........\main.m
..........\zh-Hans.lproj
..........\.............\.svn
..........\.............\....\all-wcprops
..........\.............\....\entries
..........\.............\....\lock
..........\.............\....\prop-base
..........\.............\....\props
..........\.............\....\text-base
..........\.............\....\.........\LZHViewController.xib.svn-base
..........\.............\....\tmp
..........\.............\....\...\prop-base
..........\.............\....\...\props
..........\.............\....\...\text-base
..........\.............\LZHViewController.xib
..........\璇存槑鏂囨。.strings
ScrollViewKVC.xcodeproj
.......................\.svn
.......................\....\all-wcprops
.......................\....\entries
.......................\....\lock
.......................\....\prop-base
.......................\....\props
.......................\....\text-base
.......................\....\.........\project.pbxproj.svn-base
.......................\....\tmp
.......................\....\...\prop-base
.......................\....\...\props
.......................\....\...\text-base
.......................\project.pbxproj
.......................\project.xcworkspace
.......................\...................\.svn
.......................\...................\....\all-wcprops
.......................\...................\....\entries
.......................\...................\....\lock
.......................\...................\....\prop-base
.......................\...................\....\props
.......................\...................\....\text-base
.......................\...................\....\.........\contents.xcworkspacedata.svn-base
.......................\...................\....\tmp
.......................\...................\....\...\prop-base
.......................\...................\....\...\props
.......................\...................\....\...\text-base
.......................\...................\contents.xcworkspacedata
.......................\...................\xcuserdata
.......................\...................\..........\.svn
.......................\...................\..........\....\all-wcprops
.......................\...................\..........\....\entries
.......................\...................\..........\....\lock
.......................\...................\..........\....\prop-base
.......................\...................\..........\....\props
.......................\

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