Question

I would like to display one image on top of another image. Basically i am trying to show the box is checked. The problem is that when click the unchecked image, the check button appears but the checkbox goes off.. I would like the check symbol to appear on top of the checkbox.

The code looks like this:

if (ShopCartUnedited) {
            [button setBackgroundImage:[UIImage imageNamed:@"none.png"] forState:UIControlStateNormal];
            [arrOfObjects addObject:@"NO"];
        }
        else {
            if (counter+1 <= nQty) {
                [button setBackgroundImage:[UIImage imageNamed:@"check2.png"] forState:UIControlStateNormal];
                [arrOfObjects addObject:@"YES"];
            }
            else {
                [button setBackgroundImage:[UIImage imageNamed:@"none.png"] forState:UIControlStateNormal];
                [arrOfObjects addObject:@"NO"];
            } 
        }

How do i change such the check2.png is on top of none.png when if it clicked…

Answer 1

Either you can have two different images, one with check mark and other without checkmark and switch between them. If that is not possible, you need to add a separate imageview on top of button for check2.png

//create an imageview and add on button, adjust the frame as required.
[button addSubview:imageview];
imageview.userInteractionEnabled = NO;//if button is not accepting the touches
[button setBackgroundImage:[UIImage imageNamed:@"none.png"] forState:UIControlStateNormal];

        if (ShopCartUnedited) {
            [imageview setImage:nil];
            [arrOfObjects addObject:@"NO"];
        }
        else {
            if (counter+1 <= nQty) {
                [imageview setImage:[UIImage imageNamed:@"check2.png"]];
                [arrOfObjects addObject:@"YES"];
            }
            else {
                [imageview setImage:nil];
                [arrOfObjects addObject:@"NO"];
            } 
        }

or instead of this if-else block, just use

        if ((ShopCartUnedited) || (counter+1 > nQty)) {
            [imageview setImage:nil];
            [arrOfObjects addObject:@"NO"];
        } else {
             [imageview setImage:[UIImage imageNamed:@"check2.png"]];
             [arrOfObjects addObject:@"YES"];              
        }