ios - 调用 CFRelease(ABAddressBookRef ref) 时崩溃

Question

这是我的代码，运行最后一行CFRelease(addressBook)，程序崩溃!帮帮我~!

ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL);

NSMutableArray *groups = [NSMutableArray arrayWithCapacity:ABAddressBookGetGroupCount(addressBook)];
NSMutableArray *people = [NSMutableArray arrayWithCapacity:ABAddressBookGetGroupCount(addressBook)];

[(NSArray *)CFBridgingRelease(ABAddressBookCopyArrayOfAllGroups(addressBook)) enumerateObjectsUsingBlock:^(id obj_g, NSUInteger idx, BOOL *stop) {
    ABRecordRef g = (__bridge ABRecordRef)obj_g;
    NSString *gname = CFBridgingRelease(ABRecordCopyCompositeName(g));

    NSMutableArray *gp = [[[NSArray alloc] init] mutableCopy];

    [(NSArray *)CFBridgingRelease(ABGroupCopyArrayOfAllMembers(g)) enumerateObjectsUsingBlock:^(id obj_p, NSUInteger idx, BOOL *stop) {
        ABRecordRef p = (__bridge ABRecordRef)obj_p;
        ABMultiValueRef numbers = ABRecordCopyValue(p, kABPersonPhoneProperty);

        NSString *pname = CFBridgingRelease(ABRecordCopyCompositeName(p));

        [(NSArray *) CFBridgingRelease(ABMultiValueCopyArrayOfAllValues(numbers)) enumerateObjectsUsingBlock:^(id obj_n, NSUInteger idx, BOOL *stop) {
            NSString *pnumber = CFBridgingRelease(CFBridgingRetain(obj_n));

            MasMsContact *new_c = [[MasMsContact alloc] init];
            new_c.name = pname;
            new_c.number = pnumber;
            new_c.group = gname;

            [gp addObject:new_c];
        }];

        CFRelease(numbers);
        CFRelease(p);
    }];

    CFRelease(g);

    [people addObject:[gp copy]];
    [groups addObject:gname];
}];

#warning crash when release addressBook, why ???
if (addressBook) CFRelease(addressBook);

Xcode when crash

Answer 1

您不拥有 obj_p 或 obj_g，因此当您释放它们的桥接引用然后从该枚举 block 中弹出时，它们会被过度释放。只有使用 Create 或 Copy 访问它们时，您才拥有核心基础对象。