How do I define and use an ENUM in Objective-C?

Question

I declared an enum in my implementation file as shown below, and declared a variable of that type in my interface as PlayerState thePlayerState; and used the variable in my methods. But I am getting errors stating that it is undeclared. How do I correctly declare and use a variable of type PlayerState in my methods?:In the .m file @implementation View1Controller typedef enum playerStateTypes  {   PLAYER_OFF,   PLAYER_PLAYING,   PLAYER_PAUSED  } PlayerState;in the .h file: @interface View1Controller : UIViewController {    PlayerState thePlayerState;in some method in .m file: -(void)doSomethin{ thePlayerState = PLAYER_OFF; }

Answer 1

If you are going to share this variable among several source code files,

then it must be declared as a global OUTSIDE of any methods and functions.

Preferably, put it in a header *.h file

I would declare it IMMEDIATELY after the typedef block in the same header.

Otherwise, in all of the source code files that use it, you must declare it as

an EXTERN