Twitter login authorization demo, select learning IOS programming source code, a good reference.

DMTwitterOAuth
..............\Base64Transcoder.c
..............\Base64Transcoder.h
..............\DMOAuth.h
..............\DMOAuth.m
..............\DMOAuthTwitter.h
..............\DMOAuthTwitter.m
..............\DMTwitter.h
..............\DMTwitter.m
..............\DMTwitterCore.h
..............\DMTwitterLoginViewController.h
..............\DMTwitterLoginViewController.m
..............\DMTwitterLoginViewController.xib
..............\DMTwitterOAuth
..............\DMTwitterOAuth.xcodeproj
..............\........................\project.pbxproj
..............\........................\project.xcworkspace
..............\........................\...................\contents.xcworkspacedata
..............\........................\...................\xcuserdata
..............\........................\...................\..........\malcom.xcuserdatad
..............\........................\...................\..........\..................\UserInterfaceState.xcuserstate
..............\........................\...................\..........\..................\WorkspaceSettings.xcsettings
..............\........................\xcuserdata
..............\........................\..........\malcom.xcuserdatad
..............\........................\..........\..................\xcdebugger
..............\........................\..........\..................\..........\Breakpoints.xcbkptlist
..............\........................\..........\..................\xcschemes
..............\........................\..........\..................\.........\DMTwitterOAuth.xcscheme
..............\........................\..........\..................\.........\xcschememanagement.plist
..............\..............\DMAppDelegate.h
..............\..............\DMAppDelegate.m
..............\..............\DMTwitterOAuth-Info.plist
..............\..............\DMTwitterOAuth-Prefix.pch
..............\..............\DMViewController.h
..............\..............\DMViewController.m
..............\..............\en.lproj
..............\..............\........\DMViewController.xib
..............\..............\........\InfoPlist.strings
..............\..............\main.m
..............\hmac.c
..............\hmac.h
..............\JSONKit.h
..............\JSONKit.m
..............\NSString+SHA1Extensions.h
..............\NSString+SHA1Extensions.m
..............\NSString+URLEncoding.h
..............\NSString+URLEncoding.m
..............\oauth_bird.png
..............\sha1.c
..............\sha1.h
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