Convenience method creating a new image by drawing into a context

UIImage+Util.swift

import UIKit

extension UIImage
{
	/// Creates an image from drawing into a context
	convenience init(size: CGSize, opaque: Bool = true, operations: (CGContext)->())
	{
		UIGraphicsBeginImageContextWithOptions(size, opaque, 0)
		
		let ctx = UIGraphicsGetCurrentContext()!
		
		operations(ctx)
		
		let image = UIGraphicsGetImageFromCurrentImageContext()!
		
		UIGraphicsEndImageContext()
		
		self.init(cgImage: image.cgImage!, scale: image.scale, orientation: image.imageOrientation)
	}
	
	public func resized(to size: CGSize) -> UIImage
	{
		let image = UIImage(size: size, opaque: false) { context in
			
			self.draw(in: CGRect(origin: .zero, size: size))
		}
		
		return image
	}
}