iphone - 如何在 iOS 的地址簿中检查和检索更改/新添加的联系人详细信息？

Question

在我的应用程序中，我正在获取所有地址簿数据。但是当我下次启动应用程序时，我只想检索地址簿中修改/新添加的联系人。

你能给我一些可能的方法吗？

谢谢。

Answer 1

从 iOS 9 你可以注册你的类来观察 CNContactStoreDidChangeNotification:

Obj-C 代码:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(addressBookDidChange:) name:CNContactStoreDidChangeNotification object:nil];

然后:

-(void)addressBookDidChange:(NSNotification*)notification
{
  //Handle event here...
}

Swift代码:

NSNotificationCenter.defaultCenter().addObserver(
    self,
    selector: "addressBookDidChange:",
    name: CNContactStoreDidChangeNotification,
    object: nil)

然后:

@objc func addressBookDidChange(notification: NSNotification){     
    //Handle event here...
}

如 Contacts Framework Reference 中所报告

After a save is successfully executed, the contact store posts a CNContactStoreDidChangeNotification notification to the default notification center. If you cache any Contacts framework objects you need to refetch those objects, either by their identifiers, or with the predicates that were used to originally fetch them, and then release the cached objects. Note that cached objects are stale, but not invalid.