I have a simple view with a text and an Image. I ran this app on iPhone6Plus and iPhone5. Then I made a screenshot of both and enlarged the iPhone5 screenshot such that it match
self.view.transform=CGAffineTransformScale(CGAffineTransformIdentity,self.view.frame.size.width/320, self.view.frame.size.height/568);
And you will have same result on iPhone 5/5s, iPhone 6/6+.