FaceRecognition This is a sample code that detects a face with a photo selected from the camera roll. Execution environment Swift4 xcode9 Function Select photo from camera roll Face detection of still images Demo Reference This sample code created with reference to the following https://dev.classmethod.jp/smartphone/iphone/ios-11-vision/ https://picolica.com/2017/04/25/swift3-choose-from-cameraroll/