pointer to non-const type Tile * with no explicit ownership

Question

I am trying to enable arc in my application but when xcode check my project then it is giving one error on given below line.

Tile ***grid;

Error: pointer to non-const type Tile * with no explicit ownership.

Please guide me how to solve this problem.

add some context. that line by itself is fine EXCEPT IF Tile is an NSObject — Daij-Djan, Mar 05 '13 at 12:36
try reading http://clang.llvm.org/docs/AutomaticReferenceCounting.html#conversion-of-pointers-to-ownership-qualified-types — Anoop Vaidya, Mar 05 '13 at 12:38
Tile is a object that my using to cut images into tiles, and it is object pass by reference. — Iqbal Khan, Mar 05 '13 at 12:38

score 19 · Accepted Answer · edited May 23 '17 at 10:28

19

ARC cannot infer what storage type it should use. So you have to tell it!

    Tile * __strong **grid; // Strong reference to grid

    Tile * __weak **grid; // Weak reference to grid

More about strong and weak references can be found here

edited May 23 '17 at 10:28

Community

answered Mar 05 '13 at 12:39

Daij-Djan

1 Answers1