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ABPerson
Address Book
ABRecord
Address Book
ABMultiValue
Address Book
ABMutableMultiValue
Address Book
Each of these classes contains numerous functions that can be used to build Address Book projects. We ll talk about a few important functions and point you to the class references for the rest.
Accessing Address Book properties
As you ll see shortly, the Address Book and Address Book UI frameworks ultimately provide different ways of accessing the Contacts data information: you might be working with the Address Book programmatically, or a user may be making selections through fancy UIs. Ways to select individual contacts may vary, but after a contact has been selected, you ll generally use the same getter and setter functions to work with that record. These important functions are listed in table 9.4.
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Table 9.4
Data: advanced techniques
Property setters and getters are among the most important functions in the Address Book. Function Arguments ABRecordRef, property Summary Looks up a specific property from a specific record Sets a property to a value in a record Returns the size of a multivalue (which can contain one or more copies of a record, such as multiple phone numbers) Looks up the label of an entry in a multivalue Looks up the content of an entry in a multivalue Creates a copy of a multivalue Replaces a label at an index in a multivalue
ABRecordCopyValue
ABRecordSetValue
ABRecordRef, property, value, &error ABMultiValue
ABMultiValueGetCount
ABMultiValueCopyLabelAtIndex
ABMultiValueRef, index
ABMultiValueCopyValueAtIndex
ABMultiValueRef, index
ABCreateMutableCopy ABMultiValueReplaceLabelAtIndex
ABMultiValueRef ABMutableMultiValueRef, label, index
Generally, when you re using the getter functions for contacts in the Address Book, you ll follow this procedure:
Select one or more contacts through either the Address Book or the Address Book UI framework. To look at an individual property, like a name or phone number, use ABRecordCopyValue: If it s a single-value property, you can immediately work with it as a string or some other class. If it s a multivalue property, you need to use the ABMultiValue functions to access individual elements of the multivalue.
We included the setter methods in table 9.4 to keep the methods all in one place, but you ll usually only be using the setters if you re working with the Address Book framework, not the Address Book UI framework. Here s how they work:
Make changes to individual properties or to multivalues (using the mutable multivalue). Use ABRecordSetValue to save the value to your local copy of the Address Book. Use ABAddressBookSave to save your local changes to the real Address Book database.
We won t cover the setter side of things (which you can find out about in the Address Book Programming Guide for iPhone OS ), but you ll use many of the getter functions in the next section.
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Accessing the Address Book
Querying the Address Book
Your first exploration of the Address Book will use the plain Address Book framework to access the Address Book and look up many of the values. This is shown in listing 9.5. It centers on a simple application with two objects built in Interface Builder: a UISearchBar and a UITextView (with an IBOutlet called myText). You haven t used search bars before, but they re a simple way to enter search text. You set the search bar s delegate and then respond to appropriate messages. In this case, your program responds to the searchBarSearchButtonClicked: delegate method and then looks up the information that was entered.
Listing 9.5 Looking up information in the Address Book
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar { [searchBar resignFirstResponder]; ABAddressBookRef addressBook = Copies ABAddressBookCreate(); Address Book CFIndex abPCount = ABAddressBookGetPersonCount(addressBook); Searches CFIndex abGCount = Address Book ABAddressBookGetGroupCount(addressBook); CFArrayRef searchResults = ABAddressBookCopyPeopleWithName(addressBook, (CFStringRef)searchBar.text); myText.text = [NSString stringWithString:@"Possible Completions:"]; for (int i=0; i < CFArrayGetCount(searchResults); i++) { ABRecordRef thisPerson = Gets personal CFArrayGetValueAtIndex(searchResults, i); record myText.text = [myText.text stringByAppendingFormat:@"\n\n%@", (NSString *)ABRecordCopyCompositeName (thisPerson)]; CFStringRef thisJob = ABRecordCopyValue(thisPerson, kABPersonJobTitleProperty); CFStringRef thisOrg = ABRecordCopyValue(thisPerson, kABPersonOrganizationProperty); if (thisJob != NULL && thisOrg != NULL) { myText.text = [myText.text stringByAppendingFormat: @"\n%@ of %@",thisJob,thisOrg]; Gets phone multivalue } ABMultiValueRef thisPhones = ABRecordCopyValue(thisPerson, kABPersonPhoneProperty); if (thisPhones != NULL) { for (int j = 0; j <ABMultiValueGetCount(thisPhones); j++) { myText.text = [myText.text stringByAppendingFormat: @"\n%@: %@", (NSString *) ABMultiValueCopyLabelAtIndex(thisPhones, j), (NSString *) Prints ABMultiValueCopyValueAtIndex individual (thisPhones, j)]; phone number } } } myText.text = [myText.text stringByAppendingFormat:@"\n\nThere are %ld records and %ld groups in this address book.",abPCount,abGCount];
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