Is it possible create an UIImage or an UIImageView with rounded corners? Because I want take an UIImage and show it inside an UI         
        
Try this to get rounded corners of the image View and also to colour the corners:
imageView.layer.cornerRadius = imageView.frame.size.height/2;
imageView.layer.masksToBounds = YES;
imageView.layer.borderColor = [UIColor colorWithRed:148/255. green:79/255. blue:216/255. alpha:1.0].CGColor;
imageView.layer.borderWidth=2;
Condition*: The height and the width of the imageView must be same to get rounded corners.