參考：Scroll View Tutorial in iOS8 with Swift
知識(shí)點(diǎn): UIScrollView

當(dāng)視圖超過屏幕大小時(shí)，可通過把視圖放在UIScrollView中讓視圖可以上下滾動(dòng)的功能。以一張大圖片為例。

• 新建項(xiàng)目 ScrollViewTutorial
• 代碼：

class ViewController: UIViewController {
    
    var imageView: UIImageView!
    var scrollView: UIScrollView!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        imageView = UIImageView(image: UIImage(named: "strandvagen.jpg"))
        
        scrollView = UIScrollView(frame: view.bounds)
        scrollView.backgroundColor = UIColor.black
        
        scrollView.contentSize = imageView.bounds.size
        
        scrollView.addSubview(imageView)
        
        view.addSubview(scrollView)
    }

    
}

詳細(xì)代碼：ScrollViewTutorial