讀取通信錄中的聯系人一般的過程是先查找聯系人記錄,然後再訪問記錄的屬性,屬性又可以分為單值屬性和多值屬性。通過下面例子介紹聯系人的查詢,以及單值屬性和多值屬性的訪問,還有讀取聯系人中的圖片數據。
本案例是從iOS設備上讀取通訊錄中的聯系人,並將其顯示在一個表視圖中,可以進行查詢,點擊聯系人進入詳細信息畫面。訪問通訊錄的應用必須要做的兩件事情:
1、添加AddressBook和AddressBookUI框架
為工程添加AddressBook.framework和AddressBookUI.framework
2、引入頭文件
在需要訪問通訊錄類的頭文件中引入下面頭文件:
#import <AddressBook/AddressBook.h>
#import <AddressBookUI/AddressBookUI.h>
查詢聯系人記錄
在從通信錄數據庫查詢聯系人數據是無法使用SQL語句,只能通過ABAddressBookCopyArrayOfAllPeople和ABAddressBookCopyPeopleWithName函數獲得,它們的定義如下:
FArrayRef ABAddressBookCopyArrayOfAllPeople (
ABAddressBookRef addressBook
);
CFArrayRef ABAddressBookCopyPeopleWithName (
ABAddressBookRef addressBook,
CFStringRef name
);
CFArrayRef ABAddressBookCopyArrayOfAllPeople (
ABAddressBookRef addressBook
);
CFArrayRef ABAddressBookCopyPeopleWithName (
ABAddressBookRef addressBook,
CFStringRef name
);
ABAddressBookCopyArrayOfAllPeople函數是查詢所有的聯系人數據。ABAddressBookCopyPeopleWithName函數是通過人名查詢通訊錄中的聯系人,其中的name參數就是查詢的前綴關鍵字。兩個函數中都有addressBook參數,它是我們要查詢的通訊錄對象,其創建使用ABAddressBookCreateWithOptions函數(在iOS6之前是ABAddressBookCreate函數),它的定義:
ABAddressBookRef ABAddressBookCreateWithOptions (
CFDictionaryRef options,
CFErrorRef* error
);
ABAddressBookRef ABAddressBookCreateWithOptions (
CFDictionaryRef options,
CFErrorRef* error
);
options參數是保留參數,目前沒有采用,使用時候可以傳遞NULL值。error是錯誤對象,包含錯誤信息。
下面是我們代碼中有關系查詢的部分,先看一下ViewController.h:
[cpp]
#import <UIKit/UIKit.h>
#import <AddressBook/AddressBook.h>
#import ”DetailViewController.h”
@interface ViewController : UITableViewController
<UISearchBarDelegate, UISearchDisplayDelegate>
@property (nonatomic, strong) NSArray *listContacts;
- (void)filterContentForSearchText:(NSString*)searchText;
@end
#import <UIKit/UIKit.h>
#import <AddressBook/AddressBook.h>
#import ”DetailViewController.h”
@interface ViewController : UITableViewController
<UISearchBarDelegate, UISearchDisplayDelegate>
@property (nonatomic, strong) NSArray *listContacts;
- (void)filterContentForSearchText:(NSString*)searchText;
@end
屬性listContacts是裝載聯系人記錄數組集合,filterContentForSearchText:方法是用來過濾聯系人信息的方法,也就是查詢方法。
ViewController.m中的viewDidLoad方法:
[cpp]
- (void)viewDidLoad
{
[super viewDidLoad];
CFErrorRef error = NULL;
ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error); ①
ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) { ②
if (granted) {
//查詢所有
[self filterContentForSearchText:@""]; ③
}
});
CFRelease(addressBook); ④
}
- (void)viewDidLoad
{
[super viewDidLoad];
CFErrorRef error = NULL;
ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error); ①
ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) { ②
if (granted) {
//查詢所有
[self filterContentForSearchText:@""]; ③
}
});
CFRelease(addressBook); ④
}
在viewDidLoad方法中首先在第①行代碼處使用ABAddressBookCreateWithOptions函數創建addressBook對象,然後在第②行又調用了函數ABAddressBookRequestAccessWithCompletion,這個函數用於向用戶請求訪問通訊錄數據庫,如果是第一次訪問,則會彈出一個用戶授權對話框,如果用戶授權可以訪問則會調用下面的代碼塊。
^(bool granted, CFErrorRef error) {
if (granted) {
}
});
^(bool granted, CFErrorRef error) {
if (granted) {
}
});
由於請求和代碼塊的回調都是異步的,你會發現表視圖畫面先出現,然後過一會兒才有查詢出來的結果。在iOS6之後這個請求過程必須有的,否則無法訪問通訊錄數據庫。
ViewController.m中的filterContentForSearchText:查詢方法:
[cpp]
- (void)filterContentForSearchText:(NSString*)searchText
{
//如果沒有授權則退出
if (ABAddressBookGetAuthorizationStatus() != kABAuthorizationStatusAuthorized) {
return ;
}
CFErrorRef error = NULL;
ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);
if([searchText length]==0)
{
//查詢所有
self.listContacts = CFBridgingRelease(ABAddressBookCopyArrayOfAllPeople(addressBook));
} else {
//條件查詢
CFStringRef cfSearchText = (CFStringRef)CFBridgingRetain(searchText);
self.listContacts = CFBridgingRelease(ABAddressBookCopyPeopleWithName(addressBook, cfSearchText));
CFRelease(cfSearchText);
}
[self.tableView reloadData];
CFRelease(addressBook);
}
- (void)filterContentForSearchText:(NSString*)searchText
{
//如果沒有授權則退出
if (ABAddressBookGetAuthorizationStatus() != kABAuthorizationStatusAuthorized) {
return ;
}
CFErrorRef error = NULL;
ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);
if([searchText length]==0)
{
//查詢所有
self.listContacts = CFBridgingRelease(ABAddressBookCopyArrayOfAllPeople(addressBook));
} else {
//條件查詢
CFStringRef cfSearchText = (CFStringRef)CFBridgingRetain(searchText);
self.listContacts = CFBridgingRelease(ABAddressBookCopyPeopleWithName(addressBook, cfSearchText));
CFRelease(cfSearchText);
}
[self.tableView reloadData];
CFRelease(addressBook);
}
在該方法中實現查詢,ABAddressBookGetAuthorizationStatus()函數返回應用的授權狀態,其中kABAuthorizationStatusAuthorized常量代表用戶已經授權,在沒有授權情況下該方法不進行任何處理。ABAddressBookCopyArrayOfAllPeople函數是查詢所有數據,ABAddressBookCopyPeopleWithName函數是根據條件查詢,返回值是CFArrayRef類型,不能直接賦值給listContacts(NSArray*類型)屬性,處理方式一般如下兩種:
self.listContacts = (__bridge NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook) ;
或
self.listContacts = CFBridgingRelease(ABAddressBookCopyArrayOfAllPeople(addressBook));
(__bridge NSArray *)方式不會轉讓對象所有權,只是簡單強制轉化。CFBridgingRelease函數實現的是Core Foundation類型到Foundation類型轉化並把對象所有權轉讓ARC(自動管理引用計數),因此不需要釋放屬性listContacts對應的成員變量。類似還有CFBridgingRetain函數,實現的是Foundation類型到Core Foundation類型轉化, 並把對象所有權轉讓調用者,因此需要釋放這個對象,代碼如下:
[cpp]
CFStringRef cfSearchText = (CFStringRef)CFBridgingRetain(searchText);
self.listContacts = CFBridgingRelease(ABAddressBookCopyPeopleWithName(addressBook, cfSearchText));
CFRelease(cfSearchText);
CFStringRef cfSearchText = (CFStringRef)CFBridgingRetain(searchText);
self.listContacts = CFBridgingRelease(ABAddressBookCopyPeopleWithName(addressBook, cfSearchText));
CFRelease(cfSearchText);
最後在第④行調用CFRelease(addressBook)函數釋放addressBook對象,Core Foundation框架中的數據類型內存管理是不受ARC管理的,但是與Foundation框架的MRC管理類似,需要手動釋放,CFRelease函數就是相當於Foundation框架中的release(或autorelease)方法。
ViewController.m中的SearchBar查詢相關方法:
#pragma mark –UISearchBarDelegate 協議方法
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
//查詢所有
[self filterContentForSearchText:@""];
}
#pragma mark - UISearchDisplayController Delegate Methods
//當文本內容發生改變時候,向表視圖數據源發出重新加載消息
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString];
//YES情況下表視圖可以重新加載
return YES;
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
//查詢所有
[self filterContentForSearchText:@""];
}
#pragma mark - UISearchDisplayController Delegate Methods
//當文本內容發生改變時候,向表視圖數據源發出重新加載消息
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString];
//YES情況下表視圖可以重新加載
return YES;
}
讀取單值屬性
在一條聯系人記錄中,有很多屬性,這些屬性有單值屬性和多值屬性,單值屬性是只有一個值的屬性,如:姓氏、名字等,它們是由下面常量定義的:
kABPersonFirstNameProperty,名字
kABPersonLastNameProperty,姓氏
kABPersonMiddleNameProperty,中間名
kABPersonPrefixProperty,前綴
kABPersonSuffixProperty,後綴
kABPersonNicknameProperty,昵稱
kABPersonFirstNamePhoneticProperty,名字漢語拼音或音標
kABPersonLastNamePhoneticProperty,姓氏漢語拼音或音標
q kABPersonMiddleNamePhoneticProperty,中間名漢語拼音或音標
kABPersonOrganizationProperty,組織名
kABPersonJobTitleProperty,頭銜
kABPersonDepartmentProperty,部門
kABPersonNoteProperty,備注
讀取記錄屬性函數是ABRecordCopyValue,ABRecordCopyValue函數的定義如下:
[cpp]
CFTypeRef ABRecordCopyValue (
ABRecordRef record,
ABPropertyID property
);
CFTypeRef ABRecordCopyValue (
ABRecordRef record,
ABPropertyID property
);
ABRecordRef參數是記錄對象,ABPropertyID是屬性ID,就是上面的常量kABPersonFirstNameProperty等。返回值類型是CFTypeRef,它是Core Foundation類型的“泛型”,可以代表任何的Core Foundation類型。
ViewController.m中的tableView:cellForRowAtIndexPath:方法,主要實現了訪問單值屬性:
[cpp]
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @”Cell”;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
ABRecordRef thisPerson = CFBridgingRetain([self.listContacts objectAtIndex:[indexPath row]]); ① NSString *firstName = CFBridgingRelease(ABRecordCopyValue(thisPerson, kABPersonFirstNameProperty)); ②
firstName = firstName != nil?firstName:@”";
NSString *lastName = CFBridgingRelease(ABRecordCopyValue(thisPerson, kABPersonLastNameProperty)); ③
lastName = lastName != nil?lastName:@”";
cell.textLabel.text = [NSString stringWithFormat:@"%@ %@",firstName,lastName];
CFRelease(thisPerson);
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @”Cell”;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
ABRecordRef thisPerson = CFBridgingRetain([self.listContacts objectAtIndex:[indexPath row]]); ① NSString *firstName = CFBridgingRelease(ABRecordCopyValue(thisPerson, kABPersonFirstNameProperty)); ②
firstName = firstName != nil?firstName:@”";
NSString *lastName = CFBridgingRelease(ABRecordCopyValue(thisPerson, kABPersonLastNameProperty)); ③
lastName = lastName != nil?lastName:@”";
cell.textLabel.text = [NSString stringWithFormat:@"%@ %@",firstName,lastName];
CFRelease(thisPerson);
return cell;
}
第①行ABRecordRef thisPerson = CFBridgingRetain([self.listContacts objectAtIndex:[indexPath row]])語句是從NSArray*集合中取出一個元素,並且轉化為Core Foundation類型的ABRecordRef類型。CFBridgingRelease(ABRecordCopyValue(thisPerson, kABPersonFirstNameProperty))語句是將名字屬性取出來,轉化為NSString*類型。最後CFRelease(thisPerson)是釋放ABRecordRef對象。
此外,為了把選中的聯系人傳遞給詳細畫面,我們需要獲得選中記錄的ID,然後把ID傳遞到詳細畫面,這個過程處理是在ViewController.m中的 prepareForSegue:方法完成的:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@”showDetail”]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
ABRecordRef thisPerson = CFBridgingRetain([self.listContacts objectAtIndex:[indexPath row]]);
DetailViewController *detailViewController = [segue destinationViewController];
ABRecordID personID = ABRecordGetRecordID(thisPerson); ①
NSNumber *personIDAsNumber = [NSNumber numberWithInt:personID]; ②
detailViewController.personIDAsNumber = personIDAsNumber; ③
CFRelease(thisPerson); ④
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@”showDetail”]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
ABRecordRef thisPerson = CFBridgingRetain([self.listContacts objectAtIndex:[indexPath row]]);
DetailViewController *detailViewController = [segue destinationViewController];
ABRecordID personID = ABRecordGetRecordID(thisPerson); ①
NSNumber *personIDAsNumber = [NSNumber numberWithInt:personID]; ②
detailViewController.personIDAsNumber = personIDAsNumber; ③
CFRelease(thisPerson); ④
}
}
其中第①行代碼調用函數ABRecordGetRecordID是獲取選中記錄的ID,其中ID為ABRecordID類型。為了傳遞這個ID給DetailViewController視圖控制器,DetailViewController視圖控制器定義了personIDAsNumber屬性,在第③行將ID給personIDAsNumber屬性。DetailViewController.h代碼如下:
#import <UIKit/UIKit.h>
#import <AddressBook/AddressBook.h>
@interface DetailViewController : UITableViewController
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@property (weak, nonatomic) IBOutlet UILabel *lblName;
@property (weak, nonatomic) IBOutlet UILabel *lblMobile;
@property (weak, nonatomic) IBOutlet UILabel *lblIPhone;
@property (weak, nonatomic) IBOutlet UILabel *lblWorkEmail;
@property (weak, nonatomic) IBOutlet UILabel *lblHomeEmail;
@property (strong, nonatomic) NSNumber* personIDAsNumber;
@end
personIDAsNumber屬性為NSNumber*類型。
讀取多值屬性
多值屬性是包含多個值的集合類型,如:電話號碼、Email、URL等,它們主要是由下面常量定義的:
kABPersonPhoneProperty,電話號碼屬性,kABMultiStringPropertyType類型多值屬性;
kABPersonEmailProperty,Email屬性,kABMultiStringPropertyType類型多值屬性;
kABPersonURLProperty,URL屬性,kABMultiStringPropertyType類型多值屬性;
kABPersonRelatedNamesProperty,親屬關系人屬性,kABMultiStringPropertyType類型多值屬性;
kABPersonAddressProperty,地址屬性,kABMultiDictionaryPropertyType類型多值屬性;
kABPersonInstantMessageProperty,即時聊天屬性,kABMultiDictionaryPropertyType類型多值屬性;
kABPersonSocialProfileProperty,社交賬號屬性,kABMultiDictionaryPropertyType類型多值屬性;
在多值屬性中包含了label(標簽)、value(值)和ID等部分,其中標簽和值都是可以重復的,而ID是不能重復的
多值屬性訪問方式與單值屬性訪問類似都使用ABRecordCopyValue函數。不同的是多值屬性訪問返回值是ABMultiValueRef,然後要使用ABMultiValueCopyArrayOfAllValues函數從ABMultiValueRef對象中獲取數組CFArrayRef集合。ABMultiValueCopyArrayOfAllValues函數的定義如下:
[cpp]
CFArrayRef ABMultiValueCopyArrayOfAllValues (
ABMultiValueRef multiValue
);
ABMultiValueCopyLabelAtIndex函數可以從ABMultiValueRef對象中返回標簽,其定義如下:
CFStringRef ABMultiValueCopyLabelAtIndex (
ABMultiValueRef multiValue,
CFIndex index
);
CFArrayRef ABMultiValueCopyArrayOfAllValues (
ABMultiValueRef multiValue
);
ABMultiValueCopyLabelAtIndex函數可以從ABMultiValueRef對象中返回標簽,其定義如下:
CFStringRef ABMultiValueCopyLabelAtIndex (
ABMultiValueRef multiValue,
CFIndex index
);
參數multiValue是ABMultiValueRef對象,index是查找標簽的索引。
ABMultiValueGetIdentifierAtIndex函數可以從ABMultiValueRef對象中返回ID,其定義如下:
[cpp]
ABMultiValueIdentifier ABMultiValueGetIdentifierAtIndex (
ABMultiValueRef multiValue,
CFIndex index
);
在DetailViewController.m文件viewDidLoad方法中取得Email多值屬性,其代碼如下:
ABMultiValueRef emailsProperty = ABRecordCopyValue(person, kABPersonEmailProperty);
NSArray* emailsArray = CFBridgingRelease(ABMultiValueCopyArrayOfAllValues(emailsProperty));
for(int index = 0; index< [emailsArray count]; index++){
NSString *email = [emailsArray objectAtIndex:index];
NSString *emailLabel = CFBridgingRelease(ABMultiValueCopyLabelAtIndex(emailsProperty, index));
if ([emailLabel isEqualToString:(NSString*)kABWorkLabel]) {
[self.lblWorkEmail setText:email];
} else if ([emailLabel isEqualToString:(NSString*)kABHomeLabel]) {
[self.lblHomeEmail setText:email];
} else {
NSLog(@”%@: %@”, @”其它Email”, email);
}
}
CFRelease(emailsProperty);
ABMultiValueIdentifier ABMultiValueGetIdentifierAtIndex (
ABMultiValueRef multiValue,
CFIndex index
);
在DetailViewController.m文件viewDidLoad方法中取得Email多值屬性,其代碼如下:
ABMultiValueRef emailsProperty = ABRecordCopyValue(person, kABPersonEmailProperty);
NSArray* emailsArray = CFBridgingRelease(ABMultiValueCopyArrayOfAllValues(emailsProperty));
for(int index = 0; index< [emailsArray count]; index++){
NSString *email = [emailsArray objectAtIndex:index];
NSString *emailLabel = CFBridgingRelease(ABMultiValueCopyLabelAtIndex(emailsProperty, index));
if ([emailLabel isEqualToString:(NSString*)kABWorkLabel]) {
[self.lblWorkEmail setText:email];
} else if ([emailLabel isEqualToString:(NSString*)kABHomeLabel]) {
[self.lblHomeEmail setText:email];
} else {
NSLog(@”%@: %@”, @”其它Email”, email);
}
}
CFRelease(emailsProperty);
其中ABMultiValueCopyArrayOfAllValues(emailsProperty))語句是從emailsProperty屬性中取出數組集合。kABWorkLabel和kABHomeLabel都是Email多值屬性的標簽。kABWorkLabel是工作Email標簽和kABHomeLabel是家庭Email標簽,另外還有kABOtherLabel,它是Email標簽。最後emailsProperty需要釋放。
DetailViewController.m中的viewDidLoad方法中取得電話號碼多值屬性代碼如下:
ABMultiValueRef phoneNumberProperty = ABRecordCopyValue(person, kABPersonPhoneProperty);
NSArray* phoneNumberArray = CFBridgingRelease(ABMultiValueCopyArrayOfAllValues(phoneNumberProperty));
for(int index = 0; index< [phoneNumberArray count]; index++){
NSString *phoneNumber = [phoneNumberArray objectAtIndex:index];
NSString *phoneNumberLabel =
CFBridgingRelease(ABMultiValueCopyLabelAtIndex(phoneNumberProperty, index));
if ([phoneNumberLabel isEqualToString:(NSString*)kABPersonPhoneMobileLabel]) {
[self.lblMobile setText:phoneNumber];
} else if ([phoneNumberLabel isEqualToString:(NSString*)kABPersonPhoneIPhoneLabel]) {
[self.lblIPhone setText:phoneNumber];
} else {
NSLog(@”%@: %@”, @”其它電話”, phoneNumber);
}
}
CFRelease(phoneNumberProperty);
ABMultiValueRef phoneNumberProperty = ABRecordCopyValue(person, kABPersonPhoneProperty);
NSArray* phoneNumberArray = CFBridgingRelease(ABMultiValueCopyArrayOfAllValues(phoneNumberProperty));
for(int index = 0; index< [phoneNumberArray count]; index++){
NSString *phoneNumber = [phoneNumberArray objectAtIndex:index];
NSString *phoneNumberLabel =
CFBridgingRelease(ABMultiValueCopyLabelAtIndex(phoneNumberProperty, index));
if ([phoneNumberLabel isEqualToString:(NSString*)kABPersonPhoneMobileLabel]) {
[self.lblMobile setText:phoneNumber];
} else if ([phoneNumberLabel isEqualToString:(NSString*)kABPersonPhoneIPhoneLabel]) {
[self.lblIPhone setText:phoneNumber];
} else {
NSLog(@”%@: %@”, @”其它電話”, phoneNumber);
}
}
CFRelease(phoneNumberProperty);
kABPersonPhoneMobileLabel和kABPersonPhoneIPhoneLabel都是電話號碼屬性的標簽。kABPersonPhoneMobileLabel是移動電話號碼標簽,kABPersonPhoneIPhoneLabel是iPhone電話號碼標簽。此外還有:
kABPersonPhoneMainLabel,主要電話號碼標簽;
kABPersonPhoneHomeFAXLabel,家庭傳真電話號碼標簽;
kABPersonPhoneWorkFAXLabel,工作傳真電話號碼標簽;
kABPersonPhonePagerLabel,尋呼機號碼標簽。
讀取圖片屬性
通訊錄中的聯系人可以有一個圖片,讀取聯系人圖片的相關函數有ABPersonCopyImageData和ABPersonHasImageData等。ABPersonCopyImageData可以讀取聯系人圖片函數,它的定義如下:
CFDataRef ABPersonCopyImageData (
ABRecordRef person
);
CFDataRef ABPersonCopyImageData (
ABRecordRef person
);
它的返回類型是CFDataRef,與之對應的Foundation框架類型是NSData*。ABPersonHasImageData函數用於判斷聯系人是否有圖片,它的定義如下:
[cpp]
bool ABPersonHasImageData (
ABRecordRef person
);
DetailViewController.m中的viewDidLoad方法中取得聯系人圖片代碼如下:
if (ABPersonHasImageData(person)) {
NSData *photoData = CFBridgingRelease(ABPersonCopyImageData(person));
if(photoData){
[self.imageView setImage:[UIImage imageWithData:photoData]];
}
}
bool ABPersonHasImageData (
ABRecordRef person
);
DetailViewController.m中的viewDidLoad方法中取得聯系人圖片代碼如下:
if (ABPersonHasImageData(person)) {
NSData *photoData = CFBridgingRelease(ABPersonCopyImageData(person));
if(photoData){
[self.imageView setImage:[UIImage imageWithData:photoData]];
}
}
ABPersonCopyImageData取出的是CFDataRef類型,將其轉化為NSData*,再使用UIImage的構造方法imageWithData:構建UIImage對象,然後再把UIImage對象賦值給imageView圖片控件。