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core text wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 features 2 example 3 references 4 external links toggle the table of contents core text 2 languages 日本語 türkçe edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia apple application programming interface this article needs more citations please help improve this article by adding citations to reliable sources unsourced material may be challenged and removed find sources core text news newspapers books scholar jstor september 2007 learn how and when to remove this message core text is a core foundation style api in macos first introduced in mac os x 10 4 tiger made public in mac os x 10 5 leopard and introduced for the ipad with iphone sdk 3 2 exposing a c api it replaces the text rendering abilities of the now deprecated quickdraw and atsui frameworks in previous versions of mac os x according to apple core text is designed for high performance and ease of use and its layout api is simple consistent and tightly integrated with core foundation core graphics and cocoa 1 features edit core text provides the following opaque types ctframesetter creates ctframe objects from given attributed string object and cgpath object using cttypesetter cttypesetter performs line layouts e g line breaking ctframe represents an array of lines i e ctline objects ctline represents an array of glyph runs ctrun an ordered collection of glyphs sharing the same attribute ctfont represents a font example edit the following code displays the text hello world to the given graphics context in objective c prepare font ctfontref font ctfontcreatewithname cfstr times 48 null create an attributed string cfstringref keys kctfontattributename cftyperef values font cfdictionaryref attr cfdictionarycreate null const void keys const void values sizeof keys sizeof keys 0 kcftypedictionarykeycallbacks kcftypedictionaryvaluecallbacks cfattributedstringref attrstring cfattributedstringcreate null cfstr hello world attr cfrelease attr draw the string ctlineref line ctlinecreatewithattributedstring attrstring cgcontextsettextmatrix context cgaffinetransformidentity use this one when using standard view coordinates cgcontextsettextmatrix context cgaffinetransformmakescale 1 0 1 0 use this one if the view s coordinates are flipped cgcontextsettextposition context 10 20 ctlinedraw line context clean up cfrelease line cfrelease attrstring cfrelease font references edit core text programming guide core text overview external links edit core text overview at apple developer connection v t e apple inc history outline environment marketing supply chain trade unions products hardware mac imac pro macbook air neo pro mini studio pro mac models by cpu type ipod classic mini nano shuffle touch iphone hardware history iphone models ipad mini air pro accessories ipad models other apple sim airpods pro max airtag beats pill homepod mini silicon tv vision pro watch force touch software operating systems ios ipados ios history ipados history apps macos history server apps tvos watchos visionos bridgeos darwin classic mac os carplay classroom homekit core foundation filemaker final cut pro compressor motion logic pro mainstage ilife garageband imovie iphoto apple intelligence itunes iwork keynote numbers pages mail pixelmator pro photomator quicktime safari scenekit shazam siri ai swift xcode services financial card pay wallet media arcade books music 1 beats music up next festival itunes radio app news newsstand podcasts tv streaming service originals mls on apple tv communication facetime walkie talkie imessage ichat app invites game center retail app store macos itunes store connect store fifth avenue michigan avenue pioneer place tower theatre support applecare aasp certifications genius bar procare one to one other apple account formerly apple id sign in with apple one developer iad testflight wwdc developer tools developer app icloud mobileme find my fitness photos maps companies subsidiaries anobit apple imc apple studios beats beddit braeburn capital claris acquisitions anobit authentec beats beddit bis records cue editgrid emagic fingerworks intrinsity invisage technologies the keyboard company lala metaio next nothing real p a semi power computing primesense shazam entertainment limited siri texture topsy partnerships aim alliance kaleida labs taligent akamai arm didi digital ocean eldim ifund imagination rockstar consortium design and marketing advertising 1984 think different get a mac ipod product red events idg typography legal issues and labour relations appletoo eu tax dispute litigation 2024 us antitrust case app store antitrust case non recruiting agreements price fixing ebooks fbi encryption dispute epic games supreme court case right to repair unions related car project criticism community applemasters ecosystem history codenames apple fileware ios app approvals knowledge navigator offices apple park infinite loop wolfe university people ceos michael scott mike markkula john sculley michael spindler gil amelio steve jobs tim cook john ternus board chairs mike markkula steve jobs john sculley arthur d levinson other executives current katherine adams eddy cue craig federighi isabel ge mahe greg joswiak sabih khan steve lemay jennifer newstead luca maestri deirdre o brien kevan parekh phil schiller johny srouji john ternus former alan dye angela ahrendts fred d anderson john browett guerrino de luca paul deneve al eisenstat tony fadell scott forstall john giannandrea ellen hancock nancy r heinen jony ive lisa jackson ron johnson david nagel peter oppenheimer mark papermaster dan riccio jon rubinstein bertrand serlet bruce sewell sina tamaddon avie tevanian steve wozniak founders steve jobs steve wozniak ronald wayne italics indicate discontinued products services or defunct companies category v t e macos core foundation core animation core audio core data core graphics core image core location core opengl core services core text core video v t e macos history architecture built in apps server software versions mac os x server 1 0 public beta 10 0 cheetah 10 1 puma 10 2 jaguar 10 3 panther 10 4 tiger 10 5 leopard 10 6 snow leopard os x 10 7 lion 10 8 mountain lion 10 9 mavericks 10 10 yosemite 10 11 el capitan macos 10 12 sierra 10 13 high sierra 10 14 mojave 10 15 catalina 11 big sur 12 monterey 13 ventura 14 sonoma 15 sequoia 26 tahoe 27 golden gate predecessors classic mac os nextstep rhapsody applications core applications app store automator calculator calendar contacts control center dictionary facetime finder game center grapher home mail messages news music notes notification center podcasts photo booth photos preview quicktime player reminders safari shortcuts siri stickies textedit time machine developer tools xcode instruments former interface builder dashcode quartz composer utilities boot camp deprecated colorsync configurator disk utility font book keychain access script editor system settings terminal voiceover former dashboard front row ichat iphoto isync itunes history sherlock technologies user interface airdrop appkit apple file system apple menu apple push notification service applescript aqua audio units avfoundation bonjour bundle cloudkit cocoa colorsync command key core animation core audio core data core foundation core image core opengl core text core video cover flow cups darwin dock filevault fonts foundation gatekeeper grand central dispatch icns icloud kernel panic keychain launchd liquid glass mach o menu extra metal mission control night shift opencl option key preference pane property list quartz quick look rosetta smart folders speakable items spotlight stacks system integrity protection uniform type identifier universal binary webkit xnu xquartz deprecated hfs discontinued atsui bootx brushed metal carbon classic environment inkwell quicktime spaces xgrid category this macintosh related article is a stub you can help wikipedia by adding missing information v t e retrieved from https en wikipedia org w index php title core_text oldid 1348456314 categories macintosh stubs text rendering libraries macos apis hidden categories articles with short description short description is different from wikidata use mdy dates from october 2013 articles needing additional references from september 2007 all articles needing additional references all stub articles this page was last edited on 12 april 2026 at 19 43 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents core text 2 languages add topic