Question

I’m writing a simple game, and thought it would be much easier to use structures. However, I can’t declare methods that need the structs.

How could I use a struct as an argument to an Objective-C method and get an object of the struct returned?

//my structure in the .h file
struct Entity
{
  int entityX;
  int entityY;
  int entityLength;
  int entityWidth;
  int entityType;
  bool isDead;
};

//And the methods i'm trying to use
-(BOOL)detectCollisionBetweenEntity:Entity ent1 andEntity:Entity ent2;

-(struct Entity)createEntityWithX:int newEntityX andY:int newEntityY, withType:int newEntityType withWidth:int newEntityWidth andLength:int newEntityLength;

Answer 1

You can use structs exactly like you would expect, your problem seems to be with the syntax of methods:

struct Entity
{
  int entityX;
  int entityY;
  int entityLength;
  int entityWidth;
  int entityType;
  bool isDead;
};

//And the methods i'm trying to use
-(BOOL)detectCollisionBetweenEntity:(struct Entity) ent1 andEntity:(struct Entity) ent2;

-(struct Entity)createEntityWithX:(int) newEntityX andY:(int) newEntityY withType:(int) newEntityType withWidth:(int) newEntityWidth andLength:(int) newEntityLength;

Types in methods need to be in parens, and you have to refer to struct Entity instead of Entity unless you typedef (in plain Objective-C, Objective-C++ might let you do it)