iPhone ABPeoplePickerNavigationController 内存泄漏

Question

我正在检查我的应用程序以消除所有内存泄漏，分析工具使用 abpeoplepickernavigationcontroller 发现了一个泄漏。

我知道这与复制方法有关？但不知道如何在编写时的位置和时间发布它。

我基本上需要呈现模态视图，选择电话号码，然后将其拖回文本字段。这是我的代码

-(IBAction)openAddressBook{

    ABPeoplePickerNavigationController *peoplepicker = [[ABPeoplePickerNavigationController alloc] init];

    peoplepicker.peoplePickerDelegate = self;
    [self presentModalViewController:peoplepicker animated:YES];
    [peoplepicker release];

}

- (void)peoplePickerNavigationControllerDidCancel:

(ABPeoplePickerNavigationController *)peoplePicker {

    [self dismissModalViewControllerAnimated:YES];

}

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker 
      shouldContinueAfterSelectingPerson:(ABRecordRef)person
{
    return YES;
}

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker
      shouldContinueAfterSelectingPerson:(ABRecordRef)person 
                                property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier
{


    //Retrieving the phone number property of ABRecordRef

    ABMultiValueRef phoneProperty = ABRecordCopyValue(person, property);
    NSString *phone = (NSString *)ABMultiValueCopyValueAtIndex(phoneProperty, identifier);
    phone = [phone stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    NSArray *brokenNumber = [phone componentsSeparatedByString:@" "];
    phone = [brokenNumber componentsJoinedByString:@""];

    if(![phonenumber.text isEqualToString:@""])
        phonenumber.text = [NSString stringWithFormat:@"%@%@", phonenumber.text, @";"];
    phonenumber.text = [NSString stringWithFormat:@"%@%@", phonenumber.text, phone];

    [self dismissModalViewControllerAnimated:YES];
    return NO;

}

谢谢

Answer 1

问题很可能出在这里:

ABMultiValueRef phoneProperty = ABRecordCopyValue(person, property);
NSString *phone = (NSString *)ABMultiValueCopyValueAtIndex(phoneProperty, identifier);
phone = [phone stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

您使用 ABRecordCopyValue 和 ABMultiValueCopyValueAtIndex 获得对象副本，但它们没有被释放。

ABMultiValueRef phoneProperty = ABRecordCopyValue(person, property);
NSString *phone = (NSString *)ABMultiValueCopyValueAtIndex(phoneProperty, identifier);
if (phoneProperty) {
    CFRelease(phoneProperty);
}

NSString *trimmedPhone = [phone stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if (phone) {
    CFRelease(phone);
}