UIImage quick file dump

UIImage+FileDump.swift

/// Quickly dump a UIImage from memory into a tmp file.

var image: UIImage?
// ...

let imageFilePath = NSTemporaryDirectory() + "\(Date().timeIntervalSince1970).png"
try? image.pngData()!.write(to: URL(fileURLWithPath: imageFilePath))
print("Saved turn-by-turn advice image to: \(imageFilePath)")



/// UIView to UIImage

let renderer = UIGraphicsImageRenderer(size: view.bounds.size)
let image = renderer.image { ctx in
    view.drawHierarchy(in: view.bounds, afterScreenUpdates: true)
}