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 *)getFirstLetter {
    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;
}