Make fix size round button as image in iphone sdk
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I am developing an application in which i need to round button as image (as i uploaded).![enter image description here][1]


  [1]: http://i.stack.imgur.com/MN4oe.png

It Show two corner are straigt and rest of is in round shape. I tried with`mybutton.layer.cornerRadius` but make round whole image. I also tried to just make custom button but it leave extra space in button around image i need to fix size button as image show.
Please help me. Thanks in advance. Happy Day.