Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
ReadMe.txt
DrillDownSave |
Demonstrates how to restore the user's current location in a drill-down list style user interface and |
restore that location when the app is relaunched. The drill-down or content hierarchy is generated |
from a plist file called 'outline.plist'. |
The sample stores the user's location in its preferences file using NSUserDefaults. |
One important factor this sample illustrates in restoring the proper UIViewController stack by |
telling its UINavigationController to push each level without animation like so: |
[[self navigationController] pushViewController:level3ViewController animated:NO]; |
Build Requirements |
iOS 4.0 SDK |
Runtime Requirements |
iPhone OS 3.2 or later |
Using the Sample |
Build and run DrillDownSave using Xcode. To run in the simulator, set the Active SDK to Simulator. |
To run on a device, set the Active SDK to the appropriate Device setting. |
When launched navigate through various items in the tree hierarchy. Press the home button and re-launch DrillDownSave. |
The app should return you to the same level from the previous launch. |
Packaging List |
main.m - Main source file for this sample. |
AppDelegate.h/.m - The application' delegate to setup its window and content. |
Level1ViewController.h/.m - The top-most view controller of the tree hierarchy. |
Level2ViewController.h/.m - The second level view controller of the tree hierarchy. |
Level3ViewController.h/.m - The third and last level view controller of the tree hierarchy. |
LeafViewController.h/.m - Leaf item view controller for items residing at level 3. |
outline.plist - the dictionary or outline of the view level hierarchy used in populating the drill-down list. |
Changes from Previous Versions |
1.0 - First release |
1.1 - Updated for and tested with iPhone OS 2.0. First public release. |
1.2 - Upgraded for 3.0 SDK due to deprecated APIs; in "cellForRowAtIndexPath" it now uses UITableViewCell's initWithStyle. |
1.3 - Upgraded project to build with the iOS 4.0 SDK. |
Copyright (C) 2008-2010 Apple Inc. All rights reserved. |
Copyright © 2010 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2010-06-24