Hey guys,

So I'm up to the Varying Size and Velocity stage of the Space Cat game and I have come across a rather concerning problem that results in the game crashing.

The Problem

I successfully build the app and it runs perfectly until it comes time to introduce the enemies to the game and that's when all hell breaks loose and the game crashes and I am presented with the following error:

Thread 1:EXC_ARTITHMETIC(code=EXC_I386_DIV, subcode=0x0)

This is within apparently the THUtil.m implementation file.

I have had no problems up until this stage.

The Code

Here is the code that I have for both the header (.h) and the implementation (.m) files.

THUtil.m

#import "THUtil.h"

@implementation Util

+ (NSInteger) randomWithMin:(NSInteger)min max:(NSInteger)max {
    return arc4random()%(max - min) + min;
}

@end

THUtil.h

#import <Foundation/Foundation.h>

static const int ProjectileSpeed = 400;
static const int SpaceDogMinSpeed = -100;
static const int SpaceDogMaxSpeed = -50;

typedef NS_OPTIONS(uint32_t, collisionCategory) {
    collisionCategoryEnemy      = 1 << 0,       // 0000
    collisionCategoryProjectile = 1 << 1,       // 0010
    collisionCategoryDebris     = 1 << 2,       // 0100
    collisionCategoryGround     = 1 << 3        // 1000
};

@interface Util : NSObject

+ (NSInteger) randomWithMin:(NSInteger)min max:(NSInteger)max;

@end

I'm not 100% as to what is going on here but I would really appreciate some advice on how I can rectify this problem.

Maybe Amit Bijlani could also give some advice on how this could be rectified!

Thanking you in advance

Stu :)