内存泄漏在NSObject的分配

Question

HI，我正在逐渐NSObject的分配，即内存泄漏，

ContactDTO* contactDTO = [[ContactDTO alloc] init]; 

代码：

+(ContactDTO*) getContactDTOForId:(NSString*) contactId 
{ 
NSString* homeMail =@""; 
NSString* workMail=@""; 


NSString *lastNameString=@""; 
NSString *firstNameString=@""; 

firstNameString = [AddressBookUtil getValueForProperty:kABPersonFirstNameProperty forContact:contactId]; 
lastNameString = [AddressBookUtil getValueForProperty:kABPersonLastNameProperty forContact:contactId]; 

ABRecordID contactIntId = [contactId intValue]; 
ABRecordRef person = ABAddressBookGetPersonWithRecordID(addressBook, contactIntId); 
ABMultiValueRef emailMultiValue =(NSString *)ABRecordCopyValue(person, kABPersonEmailProperty); 
for(CFIndex j=0;j<ABMultiValueGetCount(emailMultiValue);j++) 
{ 
    NSString* curentTypeLabel =(NSString *)ABMultiValueCopyLabelAtIndex(emailMultiValue,j); 

    if([curentTypeLabel isEqualToString:@"_$!<Home>!$_"]==YES) 
    { 
     NSString* currentEmail =(NSString *)ABMultiValueCopyValueAtIndex(emailMultiValue,j); 
     if([currentEmail isEqualToString:nil]==NO) 
     { 
      homeMail = [currentEmail copy]; 
     } 
    } 
    if([curentTypeLabel isEqualToString:@"_$!<Work>!$_"]==YES) 
    { 
     NSString* currentEmail =(NSString *)ABMultiValueCopyValueAtIndex(emailMultiValue,j); 
     if([currentEmail isEqualToString:nil]==NO) 
     { 
      workMail = [currentEmail copy]; 
     } 
    } 
} 

ContactDTO* contactDTO = [[ContactDTO alloc] init]; 
contactDTO.firstName = firstNameString; 
contactDTO.lastName = lastNameString; 
contactDTO.contactId = contactId; 
contactDTO.homeEmail = homeMail; 
contactDTO.workEmail = workMail; 

return [contactDTO autorelease]; 
} 

Answer 1

当从地址簿读取电子邮件地址使用ABMultiValueCopyValueAtIndex()返回由您拥有的参考资料（例如必须由您使用CFRelease()发布），[obj copy];也一样。

我假设你在你的dealloc方法中释放homeMail和workMail，但是来自地址簿的复制值似乎在这种方法中泄漏。

Answer 2

你已经发布了三个与内存泄漏有关的几乎相同的问题。您可以通过Apple's Memory Management Programming Guide进行阅读。