IOS中获取本地通讯录联系人以及汉字首字母排序

iOS中获取手机通讯录中的联系人信息：

/*** 加载本地联系人*/
- (void)loadLocalContacts
{
  //新建一个通讯录类
  ABAddressBookRef addressBooks = nil; 

  if (DeviceVersion < 6.0) {
    addressBooks = ABAddressBookCreate();
  } else {
    addressBooks = ABAddressBookCreateWithOptions(NULL, NULL);
    //获取通讯录权限
    dispatch_semaphore_t sema = dispatch_semaphore_create(0);
    ABAddressBookRequestAccessWithCompletion(addressBooks, ^(bool granted, CFErrorRef error){dispatch_semaphore_signal(sema);});
    dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
    dispatch_release(sema);
  } 

  //判断授权状态
  if (ABAddressBookGetAuthorizationStatus()!=kABAuthorizationStatusAuthorized) {
    return ;
  } 

  //获取通讯录中的所有人
  CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBooks);
  //通讯录中人数
  CFIndex nPeople = ABAddressBookGetPersonCount(addressBooks);
  NSMutableArray *persons = [[NSMutableArray alloc] init];
  for (int i = 0; i < nPeople; i++) {
    //获取个人
    ABRecordRef person = CFArrayGetValueAtIndex(allPeople, i);
    //获取个人名字
    NSString *firstName = (NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty);
    NSString *lastName = (NSString *)ABRecordCopyValue(person, kABPersonLastNameProperty);
    NSMutableString *name = [[NSMutableString alloc] init];
    if (firstName == nil && lastName == nil) {
      NSLog(@"名字不存在的情况");
      name = nil;
    }
    if (lastName) {
      [name appendString:lastName];
    }
    if (firstName) {
      [name appendString:firstName];
    } 

    ABMultiValueRef tmlphone = ABRecordCopyValue(person, kABPersonPhoneProperty);
    NSString *telphone = (NSString *)ABMultiValueCopyValueAtIndex(tmlphone, 0);
    if (telphone != nil) {
      telphone = [telphone stringByReplacingOccurrencesOfString:@"-" withString:@""];
      NSString *title = [NSString stringWithFormat:@"%@(%@)",name,telphone];
      [persons addObject:title];
    }
  } 

  //对联系人进行分组和排序
  UILocalizedIndexedCollation *theCollation = [UILocalizedIndexedCollation currentCollation];
  NSInteger highSection = [[theCollation sectionTitles] count]; //中文环境下返回的应该是27，是a－z和＃，其他语言则不同 

  //_indexArray 是右侧索引的数组，也是secitonHeader的标题
  _indexArray = [[NSMutableArray alloc] initWithArray:[theCollation sectionTitles]]; 

  NSMutableArray *newSectionsArray = [[NSMutableArray alloc] initWithCapacity:highSection];
  //初始化27个空数组加入newSectionsArray
  for (NSInteger index = 0; index < highSection; index++) {
    NSMutableArray *array = [[NSMutableArray alloc] init];
    [newSectionsArray addObject:array];
    [array release];
  } 

  for (NSString *p in persons) {
    //获取name属性的值所在的位置，比如"林丹"，首字母是L，在A~Z中排第11（第一位是0），sectionNumber就为11
    NSInteger sectionNumber = [theCollation sectionForObject:p collationStringSelector:@selector(getFirstLetter)];
    //把name为“林丹”的p加入newSectionsArray中的第11个数组中去
    NSMutableArray *sectionNames = newSectionsArray[sectionNumber];
    [sectionNames addObject:p];
  } 

  for (int i = 0; i < newSectionsArray.count; i++) {
    NSMutableArray *sectionNames = newSectionsArray[i];
    if (sectionNames.count == 0) {
      [newSectionsArray removeObjectAtIndex:i];
      [_indexArray removeObjectAtIndex:i];
      i--;
    }
  } 

  //_contacts 是联系人数组（确切的说是二维数组）
  self.contacts = newSectionsArray;
  [newSectionsArray release]; 

  [self.tableView reloadData];
}

顺便把索引和tableView dataSource的代理方法也贴一下：

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
  return self.contacts.count;
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
  return [self.contacts[section] count];
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  static NSString *identifier = @"contactCell";
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
  if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
  } 

  cell.imageView.image = [UIImage imageNamed:@"default_head"];
  cell.textLabel.text = [self.contacts objectAtIndex:indexPath.section][indexPath.row];
  return cell;
} 

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
  return [_indexArray objectAtIndex:section];
} 

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
  return _indexArray;
} 

//索引列点击事件
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{
  return index;
}

还有两个很重要的方法：

下面这个方法是[theCollation sectionForObject:p collationStringSelector:@selector(getFirstLetter)]; 是这里的p对象要实现的方法，我这里的p是NSString,你也可以用其他对象例如Person。

 NSString *ret = @"";
  if (![self canBeConvertedToEncoding: NSASCIIStringEncoding]) {//如果是英语
    if ([[self letters] length]>2) {
      ret = [[self letters] substringToIndex:1];
    }
  }
  else {
    ret = [NSString stringWithFormat:@"%c",[self characterAtIndex:0]];
  }
  return ret;
}

下面这个方法是NSString得类别方法

- (NSString *)letters{
  NSMutableString *letterString = [NSMutableString string];
  int len = [self length];
  for (int i = 0;i < len;i++)
  {
    NSString *oneChar = [[self substringFromIndex:i] substringToIndex:1];
    if (![oneChar canBeConvertedToEncoding:NSASCIIStringEncoding]) {
      NSArray *temA = makePinYin2([oneChar characterAtIndex:0]);
      if ([temA count]>0) {
        oneChar = [temA objectAtIndex:0];
      }
    }
    [letterString appendString:oneChar];
  }
  return letterString;
}

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