retainCount

Return Value 戻り値

The receiver’s reference count.

Discussion 解説

This method is of no value in debugging memory management issues. Because any number of framework objects may have retained an object in order to hold references to it, while at the same time autorelease pools may be holding any number of deferred releases on an object, it is very unlikely that you can get useful information from this method.

To understand the fundamental rules of memory management that you must abide by, read Memory Management Policy. To diagnose memory management problems, use a suitable tool:

• The Clang Static analyzer can typically find memory management problems even before you run your program.

• The Object Alloc instrument in the Instruments application (see Instruments User Guide) can track object allocation and destruction.