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    <p><strong>WARNING:</strong> There are reports that this will not work on iOS 6. This might only work on older versions of the OS. Evidently at least one dev has had their app rejected for using this trick (see the comments). Use at your own risk. Using an image (see answer above) might be a safer solution.</p> <p>This can be done without adding in your own image files using sekr1t button type 101 to get the correct shape. For me the trick was figuring out that I could use <code>initWithCustomView</code> to create the <code>BarButtonItem</code>. I personally needed this for a dynamic navbar rather than a <code>toolbar</code>, but I tested it with a toolbar and the code is nearly the same:</p> <pre><code>// create button UIButton* backButton = [UIButton buttonWithType:101]; // left-pointing shape! [backButton addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside]; [backButton setTitle:@"Back" forState:UIControlStateNormal]; // create button item -- possible because UIButton subclasses UIView! UIBarButtonItem* backItem = [[UIBarButtonItem alloc] initWithCustomView:backButton]; // add to toolbar, or to a navbar (you should only have one of these!) [toolbar setItems:[NSArray arrayWithObject:backItem]]; navItem.leftBarButtonItem = backItem; </code></pre> <p>If you're doing this on a toolbar you'll have to tweak how you set the items, but that depends on the rest of your code and I leave that as an exercise for the reader. :P This sample worked for me (compiled &amp; run).</p> <p>Blah blah, read the HIG, don't use undocumented features, and all that. There's only six supported button types and this isn't one of them.</p>
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    1. POCreating a left-arrow button (like UINavigationBar's "back" style) on a UIToolbar
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    1. CObutton type 101 doesn't seem to be giving me a left-pointing shape... just a rectangle.
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    2. COAs above, this solution may have worked in the past but certainly not with the latest SDK (4.2)
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    3. COI found someone else that had mentioned it. I *then* did a whole bunch of trial and error and didn't find anything else useful. Although the value is undocumented, this method doesn't use any privileged APIs.
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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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