iPhone ABPeoplePickerNavigationController 内存泄漏

Posted 2023-03-07

【中文标题】iPhone ABPeoplePickerNavigationController 内存泄漏

【英文标题】：iPhone ABPeoplePickerNavigationController Memory Leaks

【发布时间】：2011-08-23 13:03:00

【问题描述】：

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

我知道这与复制方法有关？但不知道如何在编写时间和地点发布它。

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

【参考方案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，但它们不会被释放。

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);

【讨论】：

完全正确，需要 CFRelease。令人讨厌的是，它看起来像 ABPeoplePickerNavigationController 本身一样泄漏。