Swift app to demonstrate state preservation and restoration APIs.
Created for a presentation at CocoaHeads Dresden on 09 July 2014. The Deckset presentation (rendered as PDF and the Markdown source) is included in the repository. Feel free to contact me for questions: @hagidd.
Last verified with Xcode 10 and iOS 12.0. The app is written in Swift 4.2.
Tags outline the various steps to enable state restoration in iOS apps:
NO_STATE_RESTORATION: The app without state restoration
STATE_RESTORATION_OPT_IN: The app generally enables state restoration, but does not implement it yet
RESTORATION_IDENTIFIERS: The app sets restoration identifiers on view controllers, but the controllers are not restored successfully yet
BASIC_STATE_RESTORATION: Initially created view controllers are restored successfully
RESTORATION_CLASS: Non-initial view controllers are restored, too
STATE_ENCODING: View controllers restore their views' state
SIZE_CLASSES: The window's size classes are preserved
Note: Both to improve the project and to support the current version of Swift, there have been major updates that are not reflected by the tagged commits. The tags are still helpful to follow the various steps, but you should use the latest commit on
master for a working version.
Apple also published two very helpful sample projects: