UTI

Presented at potatotips 19

1. UTI
2. cockscomb
5. gion-matsuri.jpg
6. ion-matsuri.jpg
7. JPEG
8. JPEG image/jpeg .jpeg public.jpeg
9. PNG image/png .png public.png
10. PNG image/png .png public.png Extension MIME Type UTI
11. File Types
 have many representations • Extension — .jpeg • MIME Type — image/jpeg • UTI — public.jpeg
12. File Types
 have many representations • Extension • for file name • MIME Type • for Internet (Content-Type) • UTI?
13. Uniform Type Identifier
14. Uniform Type Identifier • Used inside iOS/OS X • Have inheritance • public.content/public.data → public.image → public.jpeg
15. let manager = PHImageManager.defaultManager() manager.requestImageDataForAsset(asset, options: options) { (data, dataUTI, orientation, info) in // Do something } Get image data from Photos
16. let manager = PHImageManager.defaultManager() manager.requestImageDataForAsset(asset, options: options) { (data, dataUTI, orientation, info) in // Do something } Get image data from Photos
17. UTI → Extension UTTypeCopyPreferredTagWithClass( "public.jpeg", kUTTagClassFilenameExtension ).takeRetainedValue() // jpeg
18. MIME Type → UTI UTTypeCreatePreferredIdentifierForTag( kUTTagClassMIMEType, "image/jpeg", nil ).takeRetainedValue() // public.jpeg
19. 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")
20. cockscomb/UTIKit
21. 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")
22. MIME Type → Extension import UTIKit UTI(MIMEType: "image/jpeg").filenameExtension
23. 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>
24. Uniform Type Identifier • Can convert to file extension and MIME Type • Can be simple to use with UTIKit ✌ • Can be defined your own one
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