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    <p>Once you have finished using <code>addressBook</code> you need to release it using:</p> <pre><code>CFRelease(addressBook); </code></pre> <p>This should probably be placed at the end of your <code>viewWillAppear:</code> method.</p> <p><strong>Updated:</strong> There are a few unnecessary arrays and steps in your version of <code>viewWillAppear:</code>. I have cleaned it up a bit and fixed a potential memory leak. </p> <p>Note: I haven't actually run this so double-check that it works correctly.</p> <pre><code>- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; // I assume m_tableDataArray is an instance variable. If so, if the // view appears multiple times it will result in a leak unless we // release pre-existing instances first. [m_tableDataArray release], m_tableDataArray = nil; m_tableDataArray = [[NSMutableArray alloc] init]; ABAddressBookRef addressBook = ABAddressBookCreate(); NSArray *addresses = (NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook); for (ABRecordRef record in addresses) { NSString *firstName = (NSString *)ABRecordCopyValue(record, kABPersonFirstNameProperty); NSString *lastName = (NSString *)ABRecordCopyValue(record, kABPersonLastNameProperty); if(firstName != nil &amp;&amp; lastName != nil){ NSString *contactFirstLast = [NSString stringWithFormat: @"%@ %@", firstName, lastName]; [m_tableDataArray addObject:contactFirstLast]; } [firstName release]; [lastName release]; } [addresses release], addresses = nil; CFRelease(addressBook); [m_mainTable reloadData]; } </code></pre>
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    1. COlife saver.....thanks for super answer....
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