Question

i have a UIImageView object that i’m trying to get x coordinate of. I do this with code below

endingPoint.x = myObject.center.x;

Now, how can i do this if i have the same UIImageView inside of an array that i’m trying to loop through and get each object’s x coordinate, some thing like below?

endingPoint.x = [posArray objectAtIndex:i].center.x;

I know it’s a newbie question but i’m just starting with iOS.

Answer 1

You’re very close. objectAtIndex: however, returns objects of type id (a generic pointer to anything), so you may not call .center (property) on it.

You must send it a message using the brackets symbols like this:

endingPoint.x = [[posArray objectAtIndex:i] center].x;

or cast the value to (UIImageView *) first:

endingPoint.x = ((UIImageView *)[posArray objectAtIndex:i]).center.x;