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Quick Look for iOS

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Robert Brown
Robert Brown

Ever wanted to preview files like Apple's Mail app does? Quick Look is an Apple framework that lets you do just that.

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Quick Look for iOS By Robert Brown @robby_brown
What is Quick Look? Previews all common 鍖les Includes AirPrint Available since iOS 4.0
QLPreviewItem Protocol for previewing 鍖les (Required) -(NSURL)previewItemURL Must be a 鍖le URL (i.e. 鍖le://some鍖le.txt) Use [NSURL 鍖leURLWithPath:somePath] (Optional) -(NSString)previewItemTitle NSURL conforms to QLPreviewItem
QLPreviewController Subclass of UIViewController Can be pushed into view or presented modally Must have a data source May have a delegate
QLPreviewController iWork Documents Text 鍖les (with supported UTI) Microsoft Of鍖ce Documents (1997+) CSV RTF HTML PDF Images
QLPreviewControllerDataSource Similar to UITableViewDataSource Tells how many QLPreviewItems it provides Returns a QLPreviewItem when asked
QLPreviewControllerDelegate Provides call backs for when the view will dismiss and did dismiss Provides a couple animation call backs One call back asking permission to open URLs
UIDocumentInteractionController Manages user interactions with 鍖les on the local system More control than QLPreviewController Only previews one 鍖le Provides easy access to a 鍖les icons Provides access to annotation property for passing custom data with a 鍖le
Inter-app File Sharing Files arent shared, they are copied into the apps sandbox (~Documents/Inbox) An apps Info.plist speci鍖es which 鍖les are accepted with the CFBundleDocumentTypes key CFBundleDocumentTypes is an array of dictionaries
Inter-app File Sharing CFBundleDocumentTypes sub keys: CFBundleTypeName: Name of the type CFBundleTypeIconFiles: array of icons (smallest to largest) LSItemContentTypes: array of UTIs LSHandlerRank: Owner, Alternate, None, Default
Inter-app File Sharing LSHandlerRank (in order of precedence): Owner: Creator of these 鍖les Alternate: Secondary viewer None: Files can only be loaded through iTunes Default: Accepts 鍖les
Inter-app File Sharing Developer tip: Use mdls command on a 鍖le to see its UTI tree
Questions?
Demo
Want to learn more? robsprogramknowledge.blogspot.com Document Interaction Programming Topics for iOS WWDC 2010 Session 106

More Related Content

Quick Look for iOS

  • 1. Quick Look for iOS By Robert Brown @robby_brown
  • 2. What is Quick Look? Previews all common 鍖les Includes AirPrint Available since iOS 4.0
  • 3. QLPreviewItem Protocol for previewing 鍖les (Required) -(NSURL)previewItemURL Must be a 鍖le URL (i.e. 鍖le://some鍖le.txt) Use [NSURL 鍖leURLWithPath:somePath] (Optional) -(NSString)previewItemTitle NSURL conforms to QLPreviewItem
  • 4. QLPreviewController Subclass of UIViewController Can be pushed into view or presented modally Must have a data source May have a delegate
  • 5. QLPreviewController iWork Documents Text 鍖les (with supported UTI) Microsoft Of鍖ce Documents (1997+) CSV RTF HTML PDF Images
  • 6. QLPreviewControllerDataSource Similar to UITableViewDataSource Tells how many QLPreviewItems it provides Returns a QLPreviewItem when asked
  • 7. QLPreviewControllerDelegate Provides call backs for when the view will dismiss and did dismiss Provides a couple animation call backs One call back asking permission to open URLs
  • 8. UIDocumentInteractionController Manages user interactions with 鍖les on the local system More control than QLPreviewController Only previews one 鍖le Provides easy access to a 鍖les icons Provides access to annotation property for passing custom data with a 鍖le
  • 9. Inter-app File Sharing Files arent shared, they are copied into the apps sandbox (~Documents/Inbox) An apps Info.plist speci鍖es which 鍖les are accepted with the CFBundleDocumentTypes key CFBundleDocumentTypes is an array of dictionaries
  • 10. Inter-app File Sharing CFBundleDocumentTypes sub keys: CFBundleTypeName: Name of the type CFBundleTypeIconFiles: array of icons (smallest to largest) LSItemContentTypes: array of UTIs LSHandlerRank: Owner, Alternate, None, Default
  • 11. Inter-app File Sharing LSHandlerRank (in order of precedence): Owner: Creator of these 鍖les Alternate: Secondary viewer None: Files can only be loaded through iTunes Default: Accepts 鍖les
  • 12. Inter-app File Sharing Developer tip: Use mdls command on a 鍖le to see its UTI tree
  • 14. Demo
  • 15. Want to learn more? robsprogramknowledge.blogspot.com Document Interaction Programming Topics for iOS WWDC 2010 Session 106

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