SWIFT 3D触摸窥视并弹出多个图像

Question

我有两个想要强制触摸的独立图像视图。

当前，我将其作为代码：

func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
        print(convertedLocation)
        let otherViewController = self.storyboard?.instantiateViewController(withIdentifier: "preview") as? PicViewController
        otherViewController?.image = FirstImage.image!
        return otherViewController
    }

    func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {
        let otherViewController = self.storyboard?.instantiateViewController(withIdentifier: "preview") as? PicViewController
        otherViewController?.image = FirstImage.image!
        show(otherViewController!, sender: self)
    }

这适用于一个图像（FirstImage），但是如果用户选择SecondImage，我希望它执行相同的操作。有什么建议吗？