Can Any one tell me how to create the rounded button (Circular Button) in iPhone by using interface builder.
If you want a circular button than create an image with a circular shape filled with whatever you want to be displayed in the circle. Make sure your image has an alpha channel and delete all the area around your circle so the background of your image is transparent (alpha =0). (gimp is free and easy to use application for such images)
In IB create a round rect button with type custom button. Select your image as the background of your button and there you have it.