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Photo Capture Sample Swift 4 + iOS 11
//
// ViewController.swift
// PhotoCaptureSample
//
// Created by Tadashi on 2017/09/23.
// Copyright © 2017 UBUNIFU Incorporated. All rights reserved.
//
import UIKit
import AVFoundation
import Photos
class ViewController: UIViewController, AVCapturePhotoCaptureDelegate {
var captureSession: AVCaptureSession?
var capturePhotoOutput: AVCapturePhotoOutput?
var previewLayer: AVCaptureVideoPreviewLayer?
@objc var captureDevice: AVCaptureDevice?
@IBOutlet weak var exposure: UILabel!
@IBOutlet weak var iso: UILabel!
@IBOutlet weak var lensPosition: UILabel!
@IBOutlet var preView: UIView!
@IBOutlet var capture: UIButton!
@IBAction func capture(_ sender: Any) {
let photoSettings : AVCapturePhotoSettings!
photoSettings = AVCapturePhotoSettings.init(format: [AVVideoCodecKey: AVVideoCodecType.jpeg])
photoSettings.isAutoStillImageStabilizationEnabled = true
photoSettings.flashMode = .off
photoSettings.isHighResolutionPhotoEnabled = false
self.capturePhotoOutput?.capturePhoto(with: photoSettings, delegate: self)
}
override func viewDidLoad() {
super.viewDidLoad()
self.captureSession = AVCaptureSession()
self.captureSession?.sessionPreset = .photo
self.capturePhotoOutput = AVCapturePhotoOutput()
self.captureDevice = AVCaptureDevice.default(for: .video)
let input = try! AVCaptureDeviceInput(device: self.captureDevice!)
self.captureSession?.addInput(input)
self.captureSession?.addOutput(self.capturePhotoOutput!)
self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession!)
self.previewLayer?.frame = self.preView.bounds
self.previewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
self.previewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
self.preView.layer.addSublayer(self.previewLayer!)
self.captureSession?.startRunning()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.addObservers()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.removeObservers()
}
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
PHPhotoLibrary.shared().performChanges( {
let creationRequest = PHAssetCreationRequest.forAsset()
creationRequest.addResource(with: PHAssetResourceType.photo, data: photo.fileDataRepresentation()!, options: nil)
}, completionHandler: nil)
}
func photoOutput(_ captureOutput: AVCapturePhotoOutput,
didFinishCaptureFor resolvedSettings: AVCaptureResolvedPhotoSettings,
error: Error?) {
guard error == nil else {
print("Error in capture process: \(String(describing: error))")
return
}
}
func addObservers() {
self.addObserver(self, forKeyPath: "captureDevice.lensPosition" , options: .new, context: nil)
self.addObserver(self, forKeyPath: "captureDevice.exposureDuration", options: .new, context: nil)
self.addObserver(self, forKeyPath: "captureDevice.ISO", options: .new, context: nil)
}
func removeObservers() {
self.removeObserver(self, forKeyPath: "captureDevice.lensPosition")
self.removeObserver(self, forKeyPath: "captureDevice.exposureDuration")
self.removeObserver(self, forKeyPath: "captureDevice.ISO")
}
override func observeValue(forKeyPath keyPath: String?,
of object: Any?,
change: [NSKeyValueChangeKey: Any]?,
context: UnsafeMutableRawPointer?) {
if keyPath == "captureDevice.lensPosition" {
self.lensPosition.text = String(format: "%.1f", (self.captureDevice?.lensPosition)!)
}
if keyPath == "captureDevice.exposureDuration" {
let exposureDurationSeconds = CMTimeGetSeconds( (self.captureDevice?.exposureDuration)! )
self.exposure.text = String(format: "1/%.f", 1.0 / exposureDurationSeconds)
}
if keyPath == "captureDevice.ISO" {
self.iso.text = String(format: "%.f", (self.captureDevice?.iso)!)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
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