iOS：无法获取用户电子邮件地址。

Question

我希望获取用户的电子邮件地址，就像这个帖子中所示：在Cocoa中获取用户默认电子邮件地址

但是当我尝试：

NSString *theEmailAddressWeWantToObtain = @"";
ABPerson *aPerson = [[ABAddressBook sharedAddressBook] me];
ABMultiValue *emails = [aPerson valueForProperty:kABEmailProperty];
if([emails count] > 0)
        theEmailAddressWeWantToObtain = [emails valueAtIndex:0];

我有以下错误:

• 使用未声明的标识符'aPerson'
• 使用未声明的标识符'ABAddressBook'
• 未知类型'ABMultiValue'

我已经链接了AddressBook和AddressBookUI，并导入了AddressBook/AddressBook.h。

出了什么问题？

- Rob

Answer 1

这是你代码的更正建议。

NSString *theEmailAddressWeWantToObtain = @"";
ABPerson *aPerson = [[ABAddressBook sharedAddressBook] me];
ABMultiValueRef *emails = [aPerson valueForProperty:kABEmailProperty]; //No such thing as ABMultiValue; it's ABMultiValueRef
if(ABMultiValueGetCount(emails) > 0) //"emails" is not an array, so you can't use the "count" method
    theEmailAddressWeWantToObtain = [emails valueAtIndex:0];

我对键值编码不是很熟悉，所以不确定你的方法是否与之相关。

这是我会做的方式：

在电子邮件ABMultiValueRef中存储了三个电子邮件地址：家庭，工作和其他电子邮件。尝试使用以下代码获取家庭电子邮件：

NSString *email;

ABRecordRef currentPerson = (__bridge ABRecordRef)[[PSAddressBook arrayOfContacts] objectAtIndex:identifier];
ABMultiValueRef emailsMultiValueRef = ABRecordCopyValue(currentPerson, kABPersonEmailProperty);

NSUInteger emailsCount;    
//Goes through the emails to check which one is the home email
for(emailsCount = 0; emailsCount <= ABMultiValueGetCount(emailsMultiValueRef);emailsCount++){ 
    NSString *emailLabel = (__bridge_transfer NSString *)ABMultiValueCopyLabelAtIndex (emailsMultiValueRef, emailsCount);

    if([emailLabel isEqualToString:@"Home"]){

        if ((__bridge_transfer NSString *)ABMultiValueCopyValueAtIndex(emailsMultiValueRef, emailsCount) != NULL){

            email = (__bridge_transfer NSString *)ABRecordCopyValue(currentPerson, kABPersonEmailProperty);
        }   

        //If the last name property does not exist
        else{

            email = @"NULL";
        }
    }
}

CFRelease(emailsMultiValueRef);

如果您对代码有任何疑问，请在评论中提出。希望这能帮到您！

编辑：

代码中提到的PSAddressBook类可以在此处找到：https://github.com/pasawaya/PSAddressBook

- pasawaya

---

抱歉，但我第一次遇到的错误是“作业似乎已经崩溃：分段错误：11”。字符串最初为@“Home”，类似于@“_！$<Home>$！_”，在下一次迭代中除了这个错误之外，在行(__bridge_transfer NSString *)ABMultiValueCopyLabelAtIndex(emailsMultiValueRef, emailsCount)。 - HotJard

@Ujwal - 抱歉，那是我自己创建的一个类。你可以在这里找到它：https://github.com/pasawaya/PSAddressBook。 - pasawaya

@Ashwini - 当我整理我的页面时，我从GitHub上删除了它，但我可以发布你想要的方法的代码。你需要哪些代码？ - pasawaya

我需要方法arrayOfContacts才能使上面的代码片段正常工作。 - Ashwini Shahapurkar

@Ashwini - +(NSArray *)arrayOfContacts{ ABAddressBookRef addressBook = ABAddressBookCreate();
NSArray *arrayOfPeople = (__bridge_transfer NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook); CFRelease(addressBook); return arrayOfPeople; }@阿什温尼 - +（NSArray *）arrayOfContacts { ABAddressBookRef addressBook = ABAddressBookCreate(); NSArray *arrayOfPeople = (__bridge_transfer NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook); CFRelease（addressBook）; 返回arrayOfPeople; } - pasawaya