iOS-监听iPhone本地联系人的变化

最近在实现一个通讯录功能，要拿到本地联系人的信息，时时监听本地联系人的变化

先贴代码，后边再完善

//监听通讯录变化void addressBookChanged(ABAddressBookRef addressBook, CFDictionaryRef info, void *context){    NSLog(@"通讯录变化啦....");    //    VC1 *myVC = (__bridge VC1 *)context;    //    [myVC getPersonOutOfAddressBook];}- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    ATBAddressBookViewController *addressBookVC = [[ATBAddressBookViewController alloc]init];    ABAddressBookRef addresBook = ABAddressBookCreateWithOptions(NULL, NULL);    ABAddressBookRegisterExternalChangeCallback(addresBook, addressBookChanged, (__bridge void *)(addressBookVC));｝