Question

I have two Objects, one is called CollidableController and the other is Collidable. Collidable controller creates Collidables and adds them to an array (which in this case is acting like a queue) but I’m struggling to add the UIImageView of the Collidable to the current View. It works fine before I add it to the array but I can’t add the one that’s in the array

 Collidable  *collidable = [[Collidable alloc] init:0];

[leftMovingBytesQueue enqueue:collidable];
//used a category to add this to NSMutableArray so it can act as a queue, this adds the 'collidable' object to the end of the array

[view addSubview:collidable.spriteImage];
collidable.spriteImage.center=CGPointMake(200, 200);
//adding the original collidable object's uiimageview to a view works fine

int length=[leftMovingBytesQueue count]-1;

[view addSubView:[leftMovingBytesQueue objectAtIndex:length].spriteImage];
 //this line doesn't work, I get the error Semantic Issue: Property 'spriteImage' not found on object of type 'id'

Answer 1

Use “addSubview” not “addSubView”. Mind the lowercase ‘v’.
Try This:

Collidable  *collidableObj=(Collidable*)[leftMovingBytesQueue objectAtIndex:0];
UIImageView* imView=collidableObj.spriteImage; //just checking
[view addSubview:imView];

You are enqueing the collidable object. try with [leftMovingBytesQueue objectAtIndex:0]. The last element of the array might not be what you want.