Databases
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    <p>Here is an example of using <a href="http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSUserDefaults_Class/Reference/Reference.html" rel="nofollow"><code>NSUserDefaults</code></a></p> <pre><code>NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; //Set a value [defaults setBool:YES forKey:@"check1"]; //Save immediately [defaults synchronize]; //Retrieve the value for check1 BOOL retrieved = [defaults boolForKey:@"check1"]; </code></pre> <p><strong>Update</strong></p> <p>If your dataArray only contains dictionaries with bools and strings in it then you can save the entire dataArray to <code>NSUserDefaults</code>. The following code is untested but should be close to what you will need to persist your values.</p> <pre><code>-(id)yourInitMethod { dataArray = [(NSArray*)[[NSUserDefaults standardUserDefaults] objectForKey:@"dataArrayKey"] mutableCopy]; //Replace dictionaries with a mutable copy for(int i = 0; i &lt; [dataArray count]; i++) { //Your dictionary that you want to be mutable NSMutableDictionary *aCopy = [(NSDictionary*)[dataArray objectAtIndex:i] mutableCopy]; [dataArray replaceObjectAtIndex:i withObject:aCopy]; [aCopy release]; } } - (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath { NSMutableDictionary *item = [dataArray objectAtIndex:indexPath.row]; BOOL checked = [[item objectForKey:@"checked"] boolValue]; [item setObject:[NSNumber numberWithBool:!checked] forKey:@"checked"]; NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; //Save the updated data array [defaults setObject:dataArray forKey:@"dataArrayKey"]; [defaults synchronize]; } </code></pre>
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    1. POAdding NSUserDefaults to an iPhone checklist
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    1. COD'oh, beat me to it.
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    2. COShould that go in the app delegate in didFinishLaunching/appWillTerm? or should it be in the .m? If so, where? I've tried all the NSUserDefault examples I could find, and although I haven't tried exactly that code I think I'm putting it in the wrong place.
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    3. COSo where ever you have your code that has the checks you can save the value to NSUserDefaults. When that view loads just read all of the different defaults and when ever you save changes just write them all back and synchronize.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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