我正在做一个ScrollView。目前，我在ScrollView中拖了两个图像，并且我想至少UIViewController在其中添加一个新图像ScrollView。
那是我还没有的代码：
self.scrollView.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.scrollView.frame.height)
let scrollviewHeight = self.scrollView.frame.height
let scrollviewWidth = self.scrollView.frame.width
var imgOne = UIImageView(frame: CGRect(x: 0, y: 0, width: scrollviewWidth, height: scrollviewHeight))
var imgTwo = UIImageView(frame: CGRect(x: scrollviewWidth, y: 0, width: scrollviewWidth, height: scrollviewHeight))
imgOne.image = UIImage(named: "preview1")
imgTwo.image = UIImage(named: "preview2")
self.scrollView.addSubview(imgOne)
self.scrollView.addSubview(imgTwo)
self.scrollView.contentSize = CGSize(width: self.scrollView.frame.width * 2, height: self.scrollView.frame.height)
self.scrollView.isPagingEnabled = true
设计：
