override func viewDidLoad() {
    super.viewDidLoad()

    displaySize = self.view.frame.size
    if displaySize.height == 480 { //4/4S
         print("this is iPhone4/4s")
         //Do Nothing. This is base size
    }
    else if displaySize.height == 568{ //5/5S
        //保存ボタンを下にずらす
        print("this is iPhone5/5s")
        button_Save.frame.origin.y += 100
    }
(以下略)
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    displaySize = self.view.frame.size
    if displaySize.height == 480 { //4/4S
         print("this is iPhone4/4s")
         //Do Nothing. This is base size
    }
    else if displaySize.height == 568{ //5/5S
        //保存ボタンを下にずらす
        print("this is iPhone5/5s")
        button_Save.frame.origin.y += 100
    }
(以下略)
}