iOS 6地址簿无法正常工作？

Question

我从地址簿中以编程方式检索电子邮件地址的方法似乎不再适用于iOS 6设备.它在iOS 5中工作,奇怪的是,仍然适用于iOS 6模拟器.有没有一种新方法以编程方式从用户的地址簿中检索联系人？

ABAddressBookRef addressBook = ABAddressBookCreate();
CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBook);
CFIndex nPeople = ABAddressBookGetPersonCount(addressBook);

self.contacts = [[NSMutableArray alloc] init];

int contactIndex = 0;
for (int i = 0; i < nPeople; i++) {
    // Get the next address book record.
    ABRecordRef record = CFArrayGetValueAtIndex(allPeople, i);        

    // Get array of email addresses from address book record.
    ABMultiValueRef emailMultiValue = ABRecordCopyValue(record, kABPersonEmailProperty);
    NSArray *emailArray = (__bridge_transfer NSArray *)ABMultiValueCopyArrayOfAllValues(emailMultiValue);

    [self.contacts addObject:emailArray];
}

为了澄清,上面没有崩溃,它只是没有返回任何结果.ABAddressBookCopyArrayOfAllPeople为空.谢谢!

Answer 1

我创建了一个帮助类AddressBookHelper,以处理向后兼容性.这是胆量:

-(BOOL)isABAddressBookCreateWithOptionsAvailable {
    return &ABAddressBookCreateWithOptions != NULL;
}

-(void)loadContacts {
    ABAddressBookRef addressBook;
    if ([self isABAddressBookCreateWithOptionsAvailable]) {
        CFErrorRef error = nil;
        addressBook = ABAddressBookCreateWithOptions(NULL,&error);
        ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) {
            // callback can occur in background, address book must be accessed on thread it was created on
            dispatch_async(dispatch_get_main_queue(), ^{
                if (error) {
                    [self.delegate addressBookHelperError:self];
                } else if (!granted) {
                    [self.delegate addressBookHelperDeniedAcess:self];
                } else {
                    // access granted
                    AddressBookUpdated(addressBook, nil, self);
                    CFRelease(addressBook);
                }
            });
        });
    } else {
        // iOS 4/5
        addressBook = ABAddressBookCreate();
        AddressBookUpdated(addressBook, NULL, self);
        CFRelease(addressBook);
    }
}

void AddressBookUpdated(ABAddressBookRef addressBook, CFDictionaryRef info, void *context) {
    AddressBookHelper *helper = (AddressBookHelper *)context;
    ABAddressBookRevert(addressBook);
    CFArrayRef people = ABAddressBookCopyArrayOfAllPeople(addressBook);

    // process the contacts to return
    NSArray *contacts = ...    

    [[helper delegate] addressBookHelper:helper finishedLoading:contacts];
};

Answer 2

可能与新的隐私控制相关 - 从iOS 6开始,在设备上,应用无法在未经许可的情况下访问用户的联系人.从文档:

在iOS 6.0及更高版本中,如果调用者无权访问通讯簿数据库:

•对于针对iOS 6.0及更高版本链接的应用程序,此函数返回NULL.

•对于与先前版本的iOS链接的应用程序,此函数返回空的只读数据库.

如果您还没有看到权限警报出现("SomeApp希望访问您的联系人"),直接地址簿API可能只是假设他们没有访问权限而且默默地失败; 您可能必须显示AddressBookUI框架中的某些内容才能触发它.

Answer 3

试试这个:必须先授予对地址簿的访问权限,然后才能以编程方式进行访问.这就是我最终做的事情.

  #import <AddressBookUI/AddressBookUI.h>

  // Request authorization to Address Book
  ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(NULL, NULL);

  if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) {
    ABAddressBookRequestAccessWithCompletion(addressBookRef, ^(bool granted, CFErrorRef error) {
      // First time access has been granted, add the contact
      [self _addContactToAddressBook];
    });
  }
  else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized) {
    // The user has previously given access, add the contact
    [self _addContactToAddressBook];
  }
  else {
    // The user has previously denied access
    // Send an alert telling user to change privacy setting in settings app
  }