To remove circular effect

[PreetySingh]

How can I remove the white circle that is been added to each of the item. I changed the tint colour but still there is gap between two item because the circle is still being created.

thank you.

[PreetySingh]

Because of the circle present:

It looks like this:

I would like to remove white circle. I am a newbie help will be appreciated. Thanks, Kindly help me.

[leoopaiva]

is just define the background of them as clear color

callout.backgroundcolor = [UIColor ClearColor];

[PreetySingh]

Thanks.. :)