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    <p>Use an enumeration to define four options, e.g.:</p> <pre><code>typedef enum _NoteOptionType { kNoteOptionTypeOne, kNoteOptionTypeTwo, kNoteOptionTypeThree, kNoteOptionTypeFour, kNoteOptionTypes, } NoteOptionType; </code></pre> <p>These will be numbered 0 through 5. </p> <p>Core Data stores integers as <code>NSNumber</code> instances. You could perhaps keep an attribute in your <code>Note</code> entity that is called <code>optionType</code>, which stores the <code>NSNumber</code> equivalent of a <code>NoteOptionType</code> value.</p> <p>You can convert these to <code>NSNumber</code> options through something like, for example, <code>[NSNumber numberWithInt:kNoteOptionTypeOne]</code>.</p> <p>You could write a convenience method to convert a <code>NoteOptionType</code> to a string to put into a <code>UISegmentedControl</code>, e.g.:</p> <pre><code>+ (NSString *) keyForNoteOptionTypeTag:(NoteOptionType)optionTypeTag { if (optionTypeTag == kNoteOptionTypeOne) return [NSString stringWithFormat:@"First"]; else if (optionTypeTag == kNoteOptionTypeTwo) return [NSString stringWithFormat:@"Second"]; ... return [NSString stringWithFormat:@"Undefined"]; } </code></pre> <p>Reference it like so:</p> <pre><code>NSLog(@"second option is: %@", [Note keyForNoteOptionTypeTag:kNoteOptionTypeTwo]); </code></pre> <p>In your fetch, you can use the <code>NSNumber</code> values you put in your Core Data store as criteria on which to sort, through the use of an <code>NSSortDescriptor</code>, e.g.:</p> <pre><code>NSSortDescriptor *optionTypeDescriptor = [[NSSortDescriptor alloc] initWithKey:@"optionType" ascending:YES selector:nil]; NSArray *sortDescriptors = [NSArray arrayWithObjects:optionTypeDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; [optionTypeDescriptor release]; </code></pre>
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    1. POSegmented Controller (Multiple Choices) with Core Data
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    1. USAlex Reynolds
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    1. COSince the notes can have any combination of the four possible options, for this approach you will actually need to enumerate all 24 combinations.
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    2. COA segmented control is like a radio button. There will only be one option selected from the four options.
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    3. COThat said, if a different control is used, one could use a mask and `OR` the combination of various flag values, to quickly enumerate all combinations, cf. http://en.wikipedia.org/wiki/Mask_(computing)
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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.

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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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