Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
UTI
Search
cockscomb
July 14, 2015
Programming
0
2.9k
UTI
Presented at potatotips 19
cockscomb
July 14, 2015
Tweet
Share
More Decks by cockscomb
See All by cockscomb
jq at the Shortcuts
cockscomb
1
1.8k
GraphQL放談
cockscomb
4
2k
GraphQL Highway
cockscomb
28
8.4k
吉田を支える技術
cockscomb
0
2.3k
コーポレートサイトを静的化してAmplify Consoleにデプロイする
cockscomb
0
3.4k
ユーザインターフェイスと非同期処理
cockscomb
5
1.8k
GUIアプリケーションの構造と設計
cockscomb
10
10k
イカリング2におけるシングルページアプリケーション
cockscomb
2
7.5k
あなたの知らない UIKit の世界 — UITableView に UITextView を置きたい
cockscomb
1
7.4k
Other Decks in Programming
See All in Programming
AIコードエディタの基盤となるLLMのFlutter性能評価
alquist4121
0
190
Enterprise Web App. Development (1): Build Tool Training Ver. 5
knakagawa
1
110
AtCoder Heuristic First-step Vol.1 講義スライド(山登り法・焼きなまし法編)
takumi152
4
1k
Qiita Bash
mercury_dev0517
1
170
Building a macOS screen saver with Kotlin (Android Makers 2025)
zsmb
1
130
Unlock the Potential of Swift Code Generation
rockname
0
230
フロントエンドテストの育て方
quramy
11
2.9k
サービスクラスのありがたみを発見したときの思い出 #phpcon_odawara
77web
4
600
PHPでお金を扱う時、終わりのない 謎の1円調査の旅にでなくて済む方法
nakka
4
1.5k
Code smarter, not harder - How AI Coding Tools Boost Your Productivity | Webinar 2025
danielsogl
0
110
Windows版PHPのビルド手順とPHP 8.4における変更点
matsuo_atsushi
0
400
PHPのガベージコレクションを深掘りしよう
rinchoku
0
260
Featured
See All Featured
Speed Design
sergeychernyshev
28
880
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Gamification - CAS2011
davidbonilla
81
5.2k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
18
1.1k
Building Flexible Design Systems
yeseniaperezcruz
328
38k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
31
4.8k
A designer walks into a library…
pauljervisheath
205
24k
Bash Introduction
62gerente
611
210k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
7
640
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
Why Our Code Smells
bkeepers
PRO
336
57k
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
Transcript
UTI
cockscomb
None
None
gion-matsuri.jpg
ion-matsuri.jpg
JPEG
JPEG image/jpeg .jpeg public.jpeg
PNG image/png .png public.png
PNG image/png .png public.png Extension MIME Type UTI
File Types have many representations • Extension — .jpeg •
MIME Type — image/jpeg • UTI — public.jpeg
File Types have many representations • Extension • for file
name • MIME Type • for Internet (Content-Type) • UTI?
Uniform Type Identifier
Uniform Type Identifier • Used inside iOS/OS X • Have
inheritance • public.content/public.data → public.image → public.jpeg
let manager = PHImageManager.defaultManager() manager.requestImageDataForAsset(asset, options: options) { (data, dataUTI,
orientation, info) in // Do something } Get image data from Photos
let manager = PHImageManager.defaultManager() manager.requestImageDataForAsset(asset, options: options) { (data, dataUTI,
orientation, info) in // Do something } Get image data from Photos
UTI → Extension UTTypeCopyPreferredTagWithClass( "public.jpeg", kUTTagClassFilenameExtension ).takeRetainedValue() // jpeg
MIME Type → UTI UTTypeCreatePreferredIdentifierForTag( kUTTagClassMIMEType, "image/jpeg", nil ).takeRetainedValue() //
public.jpeg
MIME Type → Extension func extensionFromMIMEType(MIMEType: String) -> String {
let uti = UTTypeCreatePreferredIdentifierForTag( kUTTagClassMIMEType, MIMEType, nil ).takeRetainedValue() let ext = UTTypeCopyPreferredTagWithClass( uti, kUTTagClassFilenameExtension ).takeRetainedValue() return ext as String } extensionFromMIMEType("image/jpeg")
cockscomb/UTIKit
MIME Type → Extension func extensionFromMIMEType(MIMEType: String) -> String {
let uti = UTTypeCreatePreferredIdentifierForTag( kUTTagClassMIMEType, MIMEType, nil ).takeRetainedValue() let ext = UTTypeCopyPreferredTagWithClass( uti, kUTTagClassFilenameExtension ).takeRetainedValue() return ext as String } extensionFromMIMEType("image/jpeg")
MIME Type → Extension import UTIKit UTI(MIMEType: "image/jpeg").filenameExtension
Create your file type <array> <dict> <key>CFBundleTypeIconFiles</key> <array/> <key>CFBundleTypeName</key> <string>Awesome
File Format</string> <key>LSItemContentTypes</key> <array> <string>info.cockscomb.awesome</string> </array> </dict> </array>
Uniform Type Identifier • Can convert to file extension and
MIME Type • Can be simple to use with UTIKit ✌ • Can be defined your own one
৴ ౭ http://hatenacorp.jp/recruit/