A UIScrollView subclass that allows you to use scrollviews and autolayout without the drama...

IKScrollView.swift

enum SizeMatching {
    case Width, Height, Both, None
}

class IKScrollView: UIScrollView {
    //MARK: - Outlets
    @IBOutlet private var contentView: UIView?
    
    //MARK: - Properties
    @IBInspectable var sizeMatching = SizeMatching.Width
    
    //MARK: - Lifecycle
    override func layoutSubviews() {
        super.layoutSubviews()
        
        if let contentView = self.contentView {
            if (contentView.superview != self) {
                self.addSubview(contentView)
            }
            
            var size = contentView.bounds.size
            
            switch self.sizeMatching {
            case .Width:    size.width = self.bounds.width
            case .Height:   size.height = self.bounds.height
            case .Both:     size.width = self.bounds.width; size.height = self.bounds.height
            case .None:     break
            }
            
            contentView.frame = CGRect(origin: CGPoint(x: 0, y: 0), size: size)
            self.contentSize = size
        }
    }
}

Usage.md

1. Place a scrollview where you need in your viewcontroller as normal
2. Change its subclass to IKScrollView
3. Add a 'free floating' UIView to use as the content inside the scrollview (i.e. not part of the main view hierarchy)
4. Add elements to your content view and configure with autolayout as you would normally (make it as tall or wide as needed)
5. Connect the contentView IBOutlet from the IKScrollView to your content view
6. Optionally, set the type of size matching you want the content view to use (default is width)
7. ...enjoy your scrolling interface