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    <p>The function after the caret (^) is a "block". <a href="https://stackoverflow.com/questions/3499186/what-does-this-syntax-mean-in-objective-c">See this post.</a></p> <p>The localSearch object will invoke the block (anonymous function) defined below when it needs to (when it has completed). This is like a delegate assigned to work off the result of the operation, but without requiring you to define a new function to receive the callback. The calling class is the delegate (i.e. self refers to the caller in the function).</p> <p>I added some comments for specific details.</p> <pre><code> (MKLocalSearchResponse *response, NSError *error) { // If there is not an error if (!error) { int i = 0; do { MKMapItem *mapItem = [response.mapItems objectAtIndex:i]; // The map items found are added to a mapItems NSMutableArray (presumed) that is // owned by the original caller of this function. [self.mapItems addObject:mapItem]; i++; } while (i &lt; response.mapItems.count); // Using the Observer design pattern here. Some other object must register for the // @"Address Found" message. If any were found, it will be called. [[NSNotificationCenter defaultCenter] postNotificationName:@"Address Found" object:self]; } else { // Using the notification center to announce "not found". I am not sure if this is correct, // since this would be the response if there was an error, and not found is not necessarily // the same as an error occurring. [[NSNotificationCenter defaultCenter] postNotificationName:@"Not Found" object:self]; } </code></pre> <p>Was this helpful?</p> <p>Is there a specific problem you were trying to address?</p>
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    1. POblock object needs further explaining
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    1. COthe part which is confusing is what is the caret notation here is doing: startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error)
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    2. CORead the post referenced. It goes into detail about the notation. It weirded me out at first as well...I was very comfortable with delegates and such.
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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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