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;
}