iOS文档的地址簿编程指南中有一个奇怪的问题

Question

我是iOS编程的初学者。我使用的是Xcode4.2和iOS模拟器5.0。我正在使用iOS documentation Address Book programming Guide制作快速入门教程应用程序，并遵循教程的所有步骤，但在此代码中出现了一个奇怪的错误：

-(BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person
{
    NSString *name;
    name = (NSString *) ABRecordCopyValue(person, kABPersonFirstNameProperty);
    self.firstName.text=name;

    name=( NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty);
    self.lastName.text=name;
    [self dismissModalViewControllerAnimated:YES];
    return NO;
}

在第1行：

name = (NSString *) ABRecordCopyValue(person, kABPersonFirstNameProperty);

我得到错误Cast of C pointer type 'CFTypeRef' (aka 'const void *') to Objective-C pointer type 'NSString *' requires a bridged cast

我在这里做错了什么？

Answer 1

请查看已更新最新版本的this link：

NSString* name = (__bridge_transfer NSString*)ABRecordCopyValue(person,
                                           kABPersonFirstNameProperty);

或

NSString* name = (__bridge NSString*)ABRecordCopyValue(person,
                                           kABPersonFirstNameProperty);