iOS :无法获得用户电子邮件地址

Question

我想获得用户邮件地址，如下面的线程所示：Getting user's default email address in Cocoa

但当我试着：

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

我有这样的错误：

• 未声明标识符“aPerson”的使用
• 未声明标识符“ABAddressBook”的使用
• 未知类型的“ABMultiValue”

我链接了AddressBook和AddressBookUI，并导入了AddressBook/AddressBook.h

怎么了？

Answer 1

--以下是对代码的更正

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];

我不太熟悉键值编码，所以我不确定您的方法与此相关。

，我就是这样做的，

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，只需在注释中询问即可。希望这能有所帮助！

编辑：

代码中提到的PSAddressBook类可以在这里找到：https://github.com/pasawaya/PSAddressBook