- (void)drawcornder {
UIImage *image = [UIImage imageNamed:@"image1"];
// Begin a new image that will be the new image with the rounded corners
// (here with the size of an UIImageView)
UIGraphicsBeginImageContextWithOptions(_image.bounds.size, NO, 1.0);
// Add a clip before drawing anything, in the shape of an rounded rect
[[UIBezierPath bezierPathWithRoundedRect:_image.bounds
cornerRadius:10.0] addClip];
// Draw your image
[image drawInRect:_image.bounds];
// Get the image, here setting the UIImageView image
_image.image = UIGraphicsGetImageFromCurrentImageContext();
// Lets forget about that we were drawing
UIGraphicsEndImageContext();
}