Question

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person 
                            property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier {
if (property == kABPersonPhoneProperty) {
    ABMultiValueRef multiPhones = ABRecordCopyValue(person, kABPersonPhoneProperty);
    for(CFIndex i = 0; i < ABMultiValueGetCount(multiPhones); i++) {
        if(identifier == ABMultiValueGetIdentifierAtIndex (multiPhones, i)) {
            CFStringRef phoneNumberRef = ABMultiValueCopyValueAtIndex(multiPhones, i);
            CFRelease(multiPhones);
            NSString *phoneNumber = (NSString *) phoneNumberRef;
            CFRelease(phoneNumberRef);
            RecipientContact *recipient = [[RecipientContact alloc] init];
            recipient.phoneNumber = [NSString stringWithFormat:@"%@", phoneNumber];
            recipient.name = nil;
            [recipients addObject:recipient];
            [recipient release];
            [phoneNumber release];
        }
    }
}
[self dismissModalViewControllerAnimated:YES];
[self _addRecipients];
return NO;
}

- (void)_addRecipients {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSString *names = [[NSString alloc] init];
for (RecipientContact *recipient in recipients) {
    names = [names stringByAppendingString:recipient.phoneNumber];
    names = [names stringByAppendingString:@";"];
}
contactsField.text = names;
[pool release];
}

我正在尝试在我的项目中使用this代码，但是当我两次进入地址簿时它会崩溃。我发现当我发布一个multiPhones和phoneNumberRef时，它很顺利。但是当我CF发布他们两个，应用程序将崩溃我已经看过Core Foundation命名约定，它说“如果一个函数名称包含”Create“或”Copy“这个词，你就拥有了这个对象。”，但为什么我发布这两个应用程序崩溃了，谢谢你。

Answer 1

问题是你正在使用免费桥接然后释放NSString

        NSString *phoneNumber = (NSString *) phoneNumberRef;
        CFRelease(phoneNumberRef);
        ...
        [phoneNumber release]; //<-- this is like calling CFRelease(phoneNumberRef); again

在[phoneNumber retain]之前致电CFRelease(phoneNumberRef);或在CFRelease之前致电phoneNumberRef。

当我两次进入地址簿时，我的项目将崩溃

1 个答案: