使用ABRecord和ARC时可能出现泄漏

Question

我有这样的代码：

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker 
      shouldContinueAfterSelectingPerson:(ABRecordRef)personRecord
                                property:(ABPropertyID)property
                              identifier:(ABMultiValueIdentifier)identifier
{
    //TODO: release phoneNumberProperty when done
    ABMultiValueRef phoneNumberProperty = ABRecordCopyValue(personRecord, kABPersonPhoneProperty);
    int selectedPhNum = ABMultiValueGetIndexForIdentifier(phoneNumberProperty, identifier);//Turns identifier into index
    NSString *txtNum = (NSString *)CFBridgingRelease(ABMultiValueCopyValueAtIndex(phoneNumberProperty, selectedPhNum));
    //NSLog(@"Selected ph num = %@", txtNum);
    [[self toTextField] setText:txtNum];
    phoneNumberProperty = nil;
    [self dismissViewControllerAnimated:YES completion:NULL];

静态分析器说有一个潜在的泄漏。我知道我需要释放phoneNumberProperty，但是如何释放呢？我使用的是ARC，所以phoneNumberProperty版本不起作用。将其设置为零，它仍然会发出警告。

谢谢你的帮助

Answer 1

使用CFRelease函数释放您的ABMultiValueRef变量：

...
if (phoneNumberProperty)
    CFRelease(phoneNumberProperty);