Exif

// from resource, type
let exif = Exif(forResource: "cat", ofType: "jpg")

// from ciimage
let ciimage = CIImage()
let exif = Exif(ciimage: ciimage)

// from resource path
let url = URL(fileURLWithPath: pathString)
let exif = Exif(contentsOf: url)

let exif = Exif(forResource: "cat", ofType: "jpg")

// all properties
exif.properties.forEach { (key, value) in
    print(key, value)
}

// each property
exif.aperture
exif.fNumber // exif has 31 properties