Fix iPhone X / XS Bug

[unixb0y]

On the iPhone X / XS, the cropView and fadeView were not perfectly on top of each other (offset in y direction) and in addition, the Crop / Retake buttons weren't pinned to the bottom of the screen. This is fixed by the first couple lines.
I also set the height / width constants not to be proportional to the screen size but fixed since that's what I generally prefer for this situation.

You'll need the following extension for the first few lines to work:
(it's generally a very helpful one)

extension UIView {
    func addConstraintsWithFormat(format: String, views: UIView...) {
        var viewDict = [String: AnyObject]()
        for (index, view) in views.enumerated() {
            view.translatesAutoresizingMaskIntoConstraints = false
            let key = "v\(index)"
            viewDict[key] = view
        }
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: format, options: NSLayoutConstraint.FormatOptions(), metrics: nil, views: viewDict))
    }
}

Alternatively, you could use something like this in lines 106-108 (and don't have to use the extension):

topView.translatesAutoresizingMaskIntoConstraints = false
bottomView.translatesAutoresizingMaskIntoConstraints = false
[topView.leftAnchor.constraint(equalTo: view.leftAnchor),
topView.rightAnchor.constraint(equalTo: view.rightAnchor),

bottomView.leftAnchor.constraint(equalTo: view.leftAnchor),
bottomView.rightAnchor.constraint(equalTo: view.rightAnchor),

topView.topAnchor.constraint(equalTo: view.topAnchor),
bottomView.topAnchor.constraint(equalTo: topView.bottomAnchor),
bottomView.heightAnchor.constraint(equalToConstant: 70),
bottomView.bottomAnchor.constraint(equalTo: view.bottomAnchor)].forEach({ $0.isActive = true })

It will also fix the iPhone X / XS bug.

[jvk75]

This fixes the crop frame when coming form camera but messes up frame even more when selecting from gallery. Need to study some more.

[unixb0y]

This fixes the crop frame when coming form camera but messes up frame even more when selecting from gallery. Need to study some more.

TBH, I use it for selecting from gallery. It should be mentioned that I create my layout in code and use AutoLayout. Maybe that's why we get different results?

If I remember, I can quickly create a mini App tomorrow to show that it works in that case :D