When do I use CFRelease?
ios, iphone, objective-c, xcode
Solution
If the function name contains "Copy" or "Create", then you own the object, so you must release it when you finish your work with it. This is called "The Create Rule". For more information on Memory management for Core Foundation, you can refer to Memory Management Programming Guide for Core Foundation
Problem
i'm studying iOS programming. i wrote code that associated an address. there's so many methods. like i'm dividing a group. here's group1 ``` ABAddressBookCreate(); ABRecordCopyCompositeName(argument); ABRecordCopyValue(argument1, argument2); ABRecordCopyValue(argument1, argument2); ABMultiValueCopyLabelAtIndex(argument1, argument2); ABMultiValueCopyValueAtIndex(argument1, argument2); ``` and another one is right here, group2 ``` CFArrayGetCount(argument); CFArrayGetValueAtIndex(argument1, argument2); ABMultiValueGetCount(argument); ``` i know there's so many other methods. but i wonder when i use CFRelease method. i think group2's all methods don't do CFRelease because that contain the word "Get", not allocated. and i think group1's all method have to use CFRelease because there's a string "copy". i have a book. but there's used CFRelease twice. one is release ABAddressBookCreate() another one is ABAddressBookCopyPeopleWithName. all of other things don't use CFRelease. so i wonder when i use CFRelease. please tell me when i use CFRelease.