Swift - 滚动视图适合整个屏幕吗？

Question

My scroll view does not fit the screen entirely. There is a black border at the top and on the left side. It looks like this.

Here is the code I use to create the scrollView:

imageView = UIImageView(image: UIImage(named: "Map 1.png"))
scrollView = UIScrollView(frame: view.bounds)
scrollView.backgroundColor = UIColor.blackColor()
scrollView.contentSize = imageView.bounds.size
scrollView.addSubview(imageView)
view.addSubview(scrollView)

Answer 1

Maybe you will remove "Adjust Scroll View Insets" from UIViewController

Answer 2

imageView = UIImageView(image: UIImage(named: "Map 1.png"))
imageView.contentMode = .ScaleToFill       
imageView.frame = CGRect(x: 0, y: 0, width: self.scrollView.frame.width  , height: self.scrollView.frame.height)

scrollView.contentSize.width = scrollView.frame.width       
scrollView.addSubview(imageView)

view.addSubview(scrollView)