Question

For example I want to store this in an ivar:

CGFloat color[4] = {red, green, blue, 1.0f};

so would I put this in my header?

CGFloat color[];

How would I assign values to that guy later? I mean I can’t change it, right?

Answer 1

Instance variables are zeroed out on allocation so you can’t use initialisers with them.

You need something like this:

// MyObject.h

@interface MyObject
{
    CGFloat color[4];
}
@end

// MyObject.m

@implementation MyObject

-(id) init
{
    self = [super init];
    if (self != nil)
    {
        color[0] = red;
        color[1] = green;
        color[2] = blue;
        color[3] = alpha;
    }
    return self;
}