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    <p>The reason you're crashing is that you're assigning a value to a global variable (<code>selectedindex</code>), but you're never taking ownership of it by calling <code>-retain</code>. As a result, the string doesn't know you need it to stay around, so the system deallocates it. Later, when you try to access it, it's already deallocated.</p> <p>In order to avoid the crash, you need to add a retain call when you assign the value. Of course, since a selected index is something that's likely to be changing often, you'd want to release the previous value before overwriting it and retaining the new one. Thus, you should have this code:</p> <pre><code>[selectedindex release]; selectedindex = [[NSString stringWithFormat:@"%d", indexPath.row] retain]; </code></pre> <p>That will fix your crash.</p> <p>Now that your crash is fixed, though, you should really rethink your design. There's no reason for <code>selectedindex</code> to be a global variable; since the selected index is very likely specific to that instance of your <code>ContactsController</code>, it should be an instance variable of that class. Instead, you've declared it as a global variable, which means that there is only one <code>selectedIndex</code> shared between ALL instances of <code>ContactsController</code>. Then, in turn, your <code>+returnselectedindex</code> method should be an instance method, not a class method. (It should also be renamed in order to follow Cocoa naming conventions, but that's well off topic.)</p>
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    1. COit fixed the crashing issue and i am getting the desired output, but i still has the yellow waringline where it used to crash. i will look int0 that later on.
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      1. USRajashekar
    2. COthanyou soo much for your help. really appreciate it.
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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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