iOS 13中与历史相关的联系人框架类是什么?

API的运行方式应该是,您可以将一个“token”传递给change history请求,它将为您提供自该token之后添加/删除/更新的联系人(或组)。

到目前为止,我只能“运行”历史获取请求,如下所示:

    CNChangeHistoryFetchRequest *fetchHistory = [[CNChangeHistoryFetchRequest alloc] init];
    fetchHistory.startingToken = [[NSUserDefaults standardUserDefaults] dataForKey:@"CNContactChangeHistoryToken"];

    NSError *error = nil;

    CNContactStore *store = [[CNContactStore alloc] init];
    CNFetchResult *fetchResult = [store enumeratorForChangeHistoryFetchRequest:fetchHistory error:&error];

    NSEnumerator *enumerator = [fetchResult value];
    id object;

    while ((object = [enumerator nextObject])) {
        // do something with object
        NSLog(@"change history enumerator object = %@", object);
        CNChangeHistoryEvent *historyEvent = (CNChangeHistoryEvent *) object;
        if ([historyEvent isKindOfClass:[CNChangeHistoryDropEverythingEvent class]]) {
            NSLog(@"change history - DROP EVERYTHING!");
            [historyEvent acceptEventVisitor: self];
        } else {
            if ([historyEvent isKindOfClass:[CNChangeHistoryAddContactEvent class]]) {
                CNChangeHistoryAddContactEvent *addContactEvent = (CNChangeHistoryAddContactEvent *) object;
                NSLog(@"change history - AddContact event container %@ - %@", addContactEvent.containerIdentifier, addContactEvent.contact);
            } else if ([historyEvent isKindOfClass:[CNChangeHistoryUpdateContactEvent class]]) {
                CNChangeHistoryUpdateContactEvent *updateContactEvent = (CNChangeHistoryUpdateContactEvent *) object;
                NSLog(@"change history - UpdateContact event - %@", updateContactEvent.contact);
            } else if ([historyEvent isKindOfClass:[CNChangeHistoryDeleteContactEvent class]]) {
                CNChangeHistoryDeleteContactEvent *deleteContactEvent = (CNChangeHistoryDeleteContactEvent *) object;
                NSLog(@"change history - DeleteContact event - %@", deleteContactEvent.contactIdentifier);
            }
        }
    }

枚举将运行,并且始终是“CNChangeHistoryDropEverythingEvent”事件,然后是整个联系人列表的“Add Contact”和“Add Group”事件。这是因为我找不到任何地方获取当前令牌的方法。“fetchResult”对象 应该 currentHistoryToken 但它总是零;CNContactStore的 当前历史标记 startingToken 下一次。