內存泄漏在NSObject的分配

Question

HI，我正在逐漸NSObject的分配，即內存泄漏，

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

代碼：

+(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

當從地址簿讀取電子郵件地址使用ABMultiValueCopyValueAtIndex()返回由您擁有的參考資料（例如必須由您使用CFRelease()發佈），[obj copy];也一樣。

我假設你在你的dealloc方法中釋放homeMail和workMail，但是來自地址簿的複製值似乎在這種方法中泄漏。

Answer 2

你已經發布了三個與內存泄漏有關的幾乎相同的問題。您可以通過Apple's Memory Management Programming Guide進行閱讀。