iOS extension
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This document provides an overview of iOS app extensions. It discusses the different types of app extensions including Today widgets, share extensions, photo editing extensions, and document provider extensions. It explains how app extensions communicate and share resources with containing apps and host apps. The document also demonstrates how to create a simple app extension target and implement the basic lifecycle methods. It notes some API limitations for extensions and requirements for submitting extensions to the App Store.
![Share Resource
NSUserDefaults *shared = [[NSUserDefaults alloc] initWithSuiteName:@“group.domain"];
NSURL *directory = [[NSFileManager defaultManager]
containerURLForSecurityApplicationGroupIdentifier:@"group.domain"];](https://image.slidesharecdn.com/iosextension-141117003936-conversion-gate02/85/iOS-extension-45-320.jpg)
![Share Code
NSURL *containerURL = [[NSFileManager defaultManager]
containerURLForSecurityApplicationGroupIdentifier:@"group.domain"];
NSString *sorPath = [NSString stringWithFormat:@"%@/Dylib.framework",[[NSBundle
mainBundle] bundlePath]];
NSString *desPath = [NSString stringWithFormat:@“%@/Library/Caches/
Dylib.framework",containerURL.path];
BOOL copyResult = [[NSFileManager defaultManager] copyItemAtPath: sorPath toPath:desPath
error:&err];](https://image.slidesharecdn.com/iosextension-141117003936-conversion-gate02/85/iOS-extension-48-320.jpg)
iOS extension
- 2. ⺩王品⼠士 (Prince) @wpsteak github , linkedin
- 3. • App Extensions • Today Widget & Demo
- 4. 2007
- 6. App
- 8. Scenario 1
- 9. Edit a photo Photo Home Find App Wait App Open Find PhotoEdit Photo
- 10. Edit a photo Photo Select App Edit Photo Photo Editing Extension
- 11. Scenario 2
- 12. See scores from your favorite team Home Find App Wait App Open wait for loading Auto upload Rate me Cache Sync 8:1
- 13. See scores from your favorite team Home 8:1 Today Extension Widget
- 14. How an App Extension Works
- 17. Host app • An app that a user employs to choose an app extension is called a host app Host app Today.app Today Chrome.app Share/Action Dropbox.app Document Provider Photo.app Photo Editing
- 18. • an app that contains one or more extensions is called a containing app Containing app Containing app extension extension extension
- 19. • an app that contains one or more extensions is called a containing app Containing app
- 20. App extension • an app extension lets you extend custom functionality and content beyond App extension
- 21. App extension • an app extension lets you extend custom functionality and content beyond
- 22. Today Extension
- 23. Today Extension
- 24. Today Extension
- 25. Today Extension
- 26. Today Extension
- 27. Dropbox TodayView Today.app How an App Extension Communicates
- 28. Dropbox TodayView Today.app Database How an App Extension Communicates
- 29. Dropbox.app Dropbox TodayView Today.app Open URL Database How an App Extension Communicates
- 30. Open URL Shared Resources App extension Host app Containing app How an App Extension Communicates
- 31. Share Extension
- 32. Share Extension
- 33. Share Extension
- 34. Share Extension
- 35. Share Extension
- 38. Accessed via Apple frameworks code App extension Host app System Framework
- 39. App extension Host app AddToPocket Chrome UIActivityViewControllerSLComposeServiceViewController Accessed via Apple frameworks code
- 40. Extension Type Host App host app use Today Today.app NotificationCenter.framework Share any app UIActivityViewController Action any app UIActivityViewController Photo Editing Photo.app PhotosUI.framework Photos.framework Document Provider any app UIDocumentPickerViewController Custom Keyboard any app Host app
- 41. Extension Type Enter point Today UIViewController <NCWidgetProviding> Share SLComposeServiceViewController Action SLComposeServiceViewController UI and non-UI variants Photo Editing UIViewController <PHContentEditingController> Document Provider UIDocumentPickerViewController UI and non-UI variants Custom Keyboard UIInputViewController App extension
- 43. App extension Containing app Pocket AddToPocket Different process • Isolated address space • Executes independently • System optimizes separately Run Separately
- 44. App extension Containing app Shared Resources Share Resource App Group • UserDefault • FileManager
- 45. Share Resource NSUserDefaults *shared = [[NSUserDefaults alloc] initWithSuiteName:@“group.domain"]; NSURL *directory = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:@"group.domain"];
- 46. App extension Containing app Pocket AddToPocket ServerServer • Same data model • Same logic • Same views Share Code
- 47. App extension Containing app Pocket AddToPocket ServerServer • Framework • Static library Share Code
- 48. Share Code NSURL *containerURL = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:@"group.domain"]; NSString *sorPath = [NSString stringWithFormat:@"%@/Dylib.framework",[[NSBundle mainBundle] bundlePath]]; NSString *desPath = [NSString stringWithFormat:@“%@/Library/Caches/ Dylib.framework",containerURL.path]; BOOL copyResult = [[NSFileManager defaultManager] copyItemAtPath: sorPath toPath:desPath error:&err];
- 49. • Containing app is still most important • Extension cannot without containing app • Don't have full use of system resources • Make it seamless • Make it useful
- 50. Demo
- 51. Demo • a light bulb • sample code • Wifi Environment
- 52. App Extension • Create an app extension by adding a new target to an app • Add necessary libraries to extension target • ViewController
- 53. Load View • with storyboard • NSExtensionMainStoryboard • without interface file • NSExtensionPrincipalClass
- 54. viewController’s life cycle • initWithCoder: • viewDidLoad • widgetMarginInsetsForProposedMarginInsets: • widgetPerformUpdateWithCompletionHandler: • viewWillAppear: • viewDidAppear:
- 56. User Interface • UIView • UIButton • UILabel • UITextField • UIScrollView
- 57. Some APIs are Unavailable to App Extensions • Access a sharedApplication object • Use any API marked in header files with the NS_EXTENSION_UNAVAILABLE macro, or similar unavailability macro, or any API in an unavailable framework • Access the camera or microphone on an iOS device • Perform long-running background tasks • The specifics of this limitation vary by platform, as described in the extension point chapters in this document. • (An app extension can initiate uploads or downloads using an NSURLSession object, with results of those operations reported to the containing app.) • Receive data using AirDrop • (An app extension can send data using AirDrop in the same way an app does: by employing the UIActivityViewController class.)
- 58. App Store • NOTE ABOUT 64-BIT ARCHITECTURE • An app extension target must include the arm64 (iOS) or x86_64 architecture (OS X) in its Architectures build settings or it will be rejected by the App Store. Xcode includes the appropriate 64-bit architecture with its “Standard architectures” setting when you create a new app extension target. • If your containing app target links to an embedded framework, the app must also include 64-bit architecture or it will be rejected by the App Store.
- 59. App Store
- 60. End