iphone - ABGroupAddMember 不适用于 iOS4 设备

Question

下面的代码在模拟器(iOS 4 和 5)中运行良好，但在 iOS 4 设备上没有添加任何联系。没有返回错误。你知道为什么吗？

ABAddressBookRef ab = ABAddressBookCreate();
abGroupRef = ABAddressBookGetGroupWithRecordID(ab, 1);
ABRecordRef pRef = ABAddressBookGetPersonWithRecordID(ab, 1);
ABGroupAddMember(abGroupRef, pRef, &anError);
ABAddressBookSave(ab, &anError);

谢谢，--约瑟夫

Answer 1

始终检查返回 BOOL 值的函数的结果是一个很好的 Objective C 编程习惯(例如 ABGroupAddMember 或 ABAddressBookSave 或 NSArray 或 NSDictionary writeToFile 方法)before 检查是否有错误作为参数之一返回.

尝试这样的事情:

ABAddressBookRef ab = ABAddressBookCreate();
ABRecordRef abGroupRef = ABAddressBookGetGroupWithRecordID(ab, 1);
ABRecordRef pRef = ABAddressBookGetPersonWithRecordID(ab, 1);
CFErrorRef anError = NULL;
NSError * anErrorAsObjectiveCObject; // for use with toll free bridged object magic

if(ABGroupAddMember(abGroupRef, pRef, &anError))
{
    if(ABAddressBookSave(ab, &anError))
    {
        NSLog(@"successfully saved");
    } else {
        anErrorAsObjectiveCObject = (__bridge_transfer NSError *) anError;
        NSLog( @"error in ABAddressBookSave - %@ %@", [anErrorAsObjectiveCObject domain], [anErrorAsObjectiveCObject localizedDescription] );
    }
} else {
    anErrorAsObjectiveCObject = (__bridge_transfer NSError *) anError;
    NSLog( @"error in ABGroupAddMember - %@ %@", [anErrorAsObjectiveCObject domain], [anErrorAsObjectiveCObject localizedDescription] );
}