收到通知時，地址簿更新

我試圖使用預定義的方法收到通知時，地址簿更新

ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL); 
ABAddressBookRegisterExternalChangeCallback(addressBook, addressBookChanged, self); 

void addressBookChanged(ABAddressBookRef addressBook, CFDictionaryRef info, void *context) 
{ 
    NSLog(@"AddressBook Changed"); 
    [self getContactsFromAddressBook]; 
}

我打電話我application:didFinishLaunchingWithOptions，然後我做的回調方法，如何使用C方法中自ABAddressBookRegisterExternalChangeCallback(addressBook, addressBookChanged, self);從addressBook獲取更新？我如何更新我的tableview，如果我不能使用我的對象？

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2014-07-03 Emad Abdulrahim

您不能直接在該函數中使用self - 但是當您註冊更改回調時，您將自我作爲上下文傳遞，因此它將作爲addressBookChanged函數中的參數傳遞。

void addressBookChanged(ABAddressBookRef addressBook, CFDictionaryRef info, void *context) 
{ 
    NSLog(@"AddressBook Changed"); 
    YourClass *yourInstance = (__bridge YourClass *)(context) 
    [yourInstance getContactsFromAddressBook]; 
}

更具體到類 -

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL); 
    ABAddressBookRegisterExternalChangeCallback(addressBook, addressBookChanged, self.wkListVC);  
    return YES; 
} 

void addressBookChanged(ABAddressBookRef addressBook, CFDictionaryRef info, void *context) 
{  
    NSLog(@"AddressBook Changed");  
    wbkABViewControllerTableViewController *myVC = (__bridge wbkABViewControllerTableViewController *)context; 
    [myVC getPersonOutOfAddressBook]; 
}

確保self.wkListVC在您註冊的更改回調不爲零。

來源

2014-07-04 13:45:29 alivingston

我把我的上下文發送到回調函數'（（__bridge void *）myClass）'？當我這樣做，我發現我的情況下等於零，所以我沒有得到的對象。難道我做錯了什麼？ –

' - （BOOL）application：（UIApplication *）application didFinishLaunchingWithOptions :(NSDictionary *）launchOptions { ABAddressBookRef addressBook = ABAddressBookCreateWithOptions（NULL，NULL）; ABAddressBookRegisterExternalChangeCallback（addressBook，addressBookChanged，（__bridge void *）self.wkListVC）; 返回YES; （@ AddressBook Changed「）;} { } –

'void addressBookChanged（ABAddressBookRef addressBook，CFDictionaryRef info，void * context） { NSLog（@」AddressBook Changed「）; wbkABViewControllerTableViewController * myVC =（__bridge wbkABViewControllerTableViewController *）context; [myVC getPersonOutOfAddressBook]; } ' –

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