Cocoa Programming for OS X_ The Big Nerd Ranch Guide (5th)

CocoaProgrammingforOSX:TheBigNerdRanchGuide

byAaronHillegass,AdamPrebleandNateChandler

Copyright©2015BigNerdRanch,LLC.

Allrightsreserved.PrintedintheUnitedStatesofAmerica.Thispublicationisprotectedbycopyright,andpermissionmustbe

obtainedfromthepublisherpriortoanyprohibitedreproduction,storageinaretrievalsystem,ortransmissioninanyformorbyany

means,electronic,mechanical,photocopying,recording,orlikewise.Forinformationregardingpermissions,contact

BigNerdRanch,LLC.

200ArizonaAveNE

PearsonTechnologyGroup

800East96thStreet

Indianapolis,IN46240USA

http://www.informit.com

Theauthorsandpublisherhavetakencareinwritingandprintingthisbookbutmakenoexpressedorimpliedwarrantyofanykindand

assumenoresponsibilityforerrorsoromissions.Noliabilityisassumedforincidentalorconsequentialdamagesinconnectionwithor

arisingoutoftheuseoftheinformationorprogramscontainedherein.

Manyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethose

designationsappearinthisbook,andthepublisherwasawareofatrademarkclaim,thedesignationshavebeenprintedwithinitial

capitallettersorinallcapitals.

Dedication

ForAaron’ssons,WaldenandOtto

ForAdam’sdaughters,AimeeandLeah

∼

ForNate’sniecesandnephews

Acknowledgments

Creatingthisbookrequiredtheeffortsofmanypeople.Wewanttothankthemfortheirhelp.Theircontributionshavemadethisa

betterbookthanwecouldhaveeverwrittenalone.

ThankstothestudentswhotooktheCocoaprogrammingcourseattheBigNerdRanch.Theyhelpedusworkthekinksoutofthe

exercisesandexplanationsthatappearhere.Theircuriosityinspiredustomakethebookmorecomprehensive,andtheirpatiencemadeit

possible.

Thankyoutoallthereadersofthefirstfoureditionswhomadesuchgreatsuggestionsonourforums(http://forums.bignerdranch.com/

).

Thankyoutoourtechnicalreviewers,JuanPabloClaude,ChrisMorris,NickTeissler,PouriaAlmassi,andJohnGallagher,whomade