Using a network, select learning IOS programming source code, a good reference.

UseNetWork
..........\.DS_Store
..........\Classes
..........\.......\AsynchronousDownLoad.h
..........\.......\AsynchronousDownLoad.m
..........\.......\AsynchronousDownLoad.xib
..........\.......\Authentication.h
..........\.......\Authentication.m
..........\.......\Authentication.xib
..........\.......\checkWebSitReachable.h
..........\.......\checkWebSitReachable.m
..........\.......\checkWebSitReachable.xib
..........\.......\Classes-1.moved-aside
..........\.......\.....................\UIDevice-IP.h
..........\.......\.....................\UIDevice-IP.m
..........\.......\Classes-2.moved-aside
..........\.......\.....................\DownLoadHelper.h
..........\.......\.....................\DownLoadHelper.m
..........\.......\DownLoad.h
..........\.......\DownLoad.m
..........\.......\DownLoad.xib
..........\.......\DownLoadHelper.h
..........\.......\DownLoadHelper.m
..........\.......\DownLoadHelper.xib
..........\.......\ParserJSON.h
..........\.......\ParserJSON.m
..........\.......\ParserJSON.xib
..........\.......\Reachability.h
..........\.......\Reachability.m
..........\.......\Setting.h
..........\.......\Setting.m
..........\.......\Setting.xib
..........\.......\TestBed.h
..........\.......\TestBed.m
..........\.......\TestBed.xib
..........\.......\TestNetWorkConnection.h
..........\.......\TestNetWorkConnection.m
..........\.......\TestNetWorkConnection.xib
..........\.......\UIDevice-IP.h
..........\.......\UIDevice-IP.m
..........\.......\untitled.h
..........\.......\untitled.m
..........\.......\UseNetWorkAppDelegate.h
..........\.......\UseNetWorkAppDelegate.m
..........\.......\UseNetWorkViewController.h
..........\.......\UseNetWorkViewController.m
..........\.......\UserNSXMLParser.xib
..........\.......\UseXMLParser.h
..........\.......\UseXMLParser.m
..........\.......\UseXMLParser.xib
..........\JSON.h
..........\main.m
..........\MainWindow.xib
..........\NSObject+SBJSON.h
..........\NSObject+SBJSON.m
..........\NSString+SBJSON.h
..........\NSString+SBJSON.m
..........\SBJsonBase.h
..........\SBJsonBase.m
..........\SBJsonParser.h
..........\SBJsonParser.m
..........\SBJsonStreamWriter.h
..........\SBJsonStreamWriter.m
..........\SBJsonWriter.h
..........\SBJsonWriter.m
..........\SBProxyForJson.h
..........\test.json
..........\UseNetWork-Info.plist
..........\UseNetWork.xcodeproj
..........\....................\project.pbxproj
..........\....................\vistech.mode1v3
..........\....................\vistech.pbxuser
..........\UseNetWorkViewController.xib
..........\UseNetWork_Prefix.pch
__MACOSX
........\._UseNetWork
........\UseNetWork
........\..........\._.DS_Store
........\..........\._Classes
........\..........\._JSON.h
........\..........\._main.m
........\..........\._MainWindow.xib
........\..........\._NSObject+SBJSON.h
........\..........\._NSObject+SBJSON.m
........\..........\._NSString+SBJSON.h
........\..........\._NSString+SBJSON.m
........\..........\._SBJsonBase.h
........\..........\._SBJsonBase.m
........\..........\._SBJsonParser.h
........\..........\._SBJsonParser.m
........\..........\._SBJsonStreamWriter.h
........\..........\._SBJsonStreamWriter.m
........\..........\._SBJsonWriter.h
........\..........\._SBJsonWriter.m
........\..........\._SBProxyForJson.h
........\..........\._test.json
........\..........\._UseNetWork-Info.plist
........\..........\._UseNetWork.xcodeproj
........\..........\._UseNetWorkViewController.xib
........\..........\._UseNetWork_Prefix.pch

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