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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