How to remove effect from a button?

In my app for iPad. First I have a welcome screen. Screen has a custom button with an image. When I press that button, it shows some gray effect before m开发者_如何学运维oving to the next screen. I don't want that effect to appear. How can I remove that gray effect?

Regards PC

That is the highlighted state of the UIButton. Per the UIButton Class Reference you can call [button adjustsImageWhenHighlighted:NO]; to remove it.

Set the image for the button to nil for the Highlighted state. [mybutton setImage:nil forState:UIControlStateHighlighted];