Question

As per my knowledge, I know that we use -fno-objc-arc flag to disable ARC for files that NOT support ARC in an ARC project.

And also we can use -fobjc-arc flag to enable ARC for files support ARC in a Non-ARC project.

But if I want to convert my ARC project(not particular file) to Non-ARC project, then how should I go ahead for the same?

Anyone please brief me about the same.

Thanks in Advance.

Answer 1

You have to insert manual memory management method calls in the appropriate places. In general, every new, alloc, retain, copy and mutableCopy call shall be balanced by a release or an autorelease (the latter is mainly used in the case of return values), so, for example, the following ARC-enabled code:

MyClass *myObj = [[MyClass alloc] init];
[myObj doStuff];

OtherClass *otherObj = [[OtherClass alloc] init];
return otherObj;

should be something like this under MRC:

MyClass *myObj = [[MyClass alloc] init];
[myObj doStuff];
[myObj release];

OtherClass *otherObj = [[OtherClass alloc] init];
return [otherObj autorelease];

More about memory management in the official documentation.