Best way to detect the touched object (moving) from collection in libgdx

Question

This is my first attempt in game development. I just started experimenting libgdx and understanding the different aspects of game programming. I looked at the sample project

Answer 1

I've solved the problem by making an invisible rectangle which will follow the tap location and I made an if statement checking for overlapping of the invisible rectangle and checking for if the screen was just tapped.

Here is the code:

if(Gdx.input.isTouched()) {
        Vector3 pointerPos = new Vector3();
        pointerPos.set(Gdx.input.getX(), Gdx.input.getY(), 0);
        cam.unproject(pointerPos);
        touchPos.x = pointerPos.x /*+ 64 / 2*/;
        touchPos.y = pointerPos.y /*+ 64 / 2*/;
    }

    Iterator iter = raindrops.iterator();
    while(iter.hasNext()) {
        Rectangle raindrop = iter.next();
        raindrop.y -= 300 * Gdx.graphics.getDeltaTime();
        if(raindrop.y + 64 < 0) {
            iter.remove();
        }
        if(raindrop.overlaps(touchPos) && Gdx.input.justTouched()) {
            iter.remove();
            dropSound.play();
        }

all of this code is in the render method.

P.S: Change raindrops to the fly objects you want