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    <p>iOS 4+ provides new API that allows one to select a specific ABSource from the ABAddressBook. This may be useful as some operations, e.g. creating an ABGroup, are not supported in some sources (i.e. Exchange).</p> <p>"Not all source types support groups, more conspicuously, Exchange does not know anything about groups." - <a href="http://flavors.me/volonbolon#1a5/tumblr" rel="noreferrer">http://flavors.me/volonbolon#1a5/tumblr</a></p> <p>Attached are functions that leverage the new API to obtain sources of specific types which may be used in calls to ABGroupCreateInSource().</p> <pre><code>#define CFRELEASE_AND_NIL(x) CFRelease(x); x=nil; ABRecordRef sourceWithType (ABSourceType mySourceType) { ABAddressBookRef addressBook = ABAddressBookCreate(); CFArrayRef sources = ABAddressBookCopyArrayOfAllSources(addressBook); CFIndex sourceCount = CFArrayGetCount(sources); ABRecordRef resultSource = NULL; for (CFIndex i = 0 ; i &lt; sourceCount; i++) { ABRecordRef currentSource = CFArrayGetValueAtIndex(sources, i); CFTypeRef sourceType = ABRecordCopyValue(currentSource, kABSourceTypeProperty); BOOL isMatch = mySourceType == [(NSNumber *)sourceType intValue]; CFRELEASE_AND_NIL(sourceType); if (isMatch) { resultSource = currentSource; break; } } CFRELEASE_AND_NIL(addressBook); CFRELEASE_AND_NIL(sources); return resultSource; } ABRecordRef localSource() { return sourceWithType(kABSourceTypeLocal); } ABRecordRef exchangeSource() { return sourceWithType(kABSourceTypeExchange); } ABRecordRef mobileMeSource() { return sourceWithType(kABSourceTypeMobileMe); } </code></pre>
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    1. COReaders, be aware that not all devices will have a local source (see comments below), so you will need to be able to handle cases where the requested source does not exist. It also does not appear to be possible to programmatically create a local source.
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    2. COwhat about releasing the copied values? Is this unnecessary for some reason I don't see?
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    3. COMartin - Good catch. The leaks should be fixed now.
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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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