Question

So I created an NSMutableArray of UIImageView like this:

NSMutableArray* imageViewArray = [[NSMutableArray alloc] init];
for(int i = 0; i < 15; i++){
    UIImageView* imageView = [self animationInit:imageArray xPos:0 yPos:480 wFrame:32
                                                      hFrame:32 duration:0.5 repeat:0];
    [imageViewArray addObject:imageView];
    [imageView release];
    imageView = nil;
    [self.view addSubview:[imageViewArray objectAtIndex:i]];
}

The method “animationInit” is a method I created to init the UIImageView. Its implementation is this:

-(UIImageView*)animationInit:(NSArray*)imageArray xPos:(float)x yPos:(float)y wFrame:
                    (float)w hFrame:(float)h duration:(float)duration repeat:(float)count {
     UIImageView* imageAnimation = [[UIImageView alloc] initWithFrame:CGRectMake(x, y, w, h)];
     imageAnimation.animationImages = imageArray;
     imageAnimation.animationDuration = duration;
     imageAnimation.animationRepeatCount = count;

     return imageAnimation;
 }

I am able to set the center of each UIImageView in the array using like this:

[imageViewArray objectAtIndex:Index] setCenter:CGPointMake(x, y)];

Now I would like to do be able to modify the x and y points like I would with a normal UIImageView. An example: UIImageView.center = CGPointMake(UIImageView.center.x + 5, UIImageView.center.y + 5);

The problem here is I have no idea how to access the “UIImageView.center.x/y” within the array of UIImageViews. Is there any way to access the “center.x/y” like I was able to with “setCenter:” or would I be better off creating a bunch of CGPoints to hold the x and y of the UIImageViews in the array?

When I try [imageViewArray objectAtInded:Index].center.x, I get the following error.

Request for member ‘center’ in something no a structure or union

Is there a solution or workaround?

Answer 1

In order to access the x and y values of an array of UIImageViews you have to use the following.

[imageViewArray objectAtIndex:Index] center].x

With that, I was able to use the following.

UIImageView.center = CGPointMake(UIImageView.center.x + 5, UIImageView.center.y + 5);

Like this:

[[imageViewArray objectAtIndex:Index] setCenter:CGPointMake([imageViewArray objectAtIndex:Index] center].x + 5, [imageViewArray objectAtIndex:Index] center].y + 5)];

Again sorry for the mess and any confusion I may have caused. I confused the heck out of myself with this one.

(I found the solution and thought it best I share it just in case anyone else runs into the same problem.)