iOS Swift ImagePickerController：改进编辑模式
iOS Swift ImagePickerController: Improving Edit Mode
我有一个 allowsEditing = true 的 ImagePickerController。但我想在编辑屏幕中有更多选项，而不仅仅是调整大小模式。我该如何改进它？
您无法改进本机 image/video 编辑屏幕。如果您需要更多选项，则需要创建自己的控制器来接受原始相机输出并对其进行编辑。
我同意@Lope 你可以通过收集相机输入来制作你自己的：
import UIKit
import AVFoundation
import AssetsLibrary
class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {
var SessionRunningAndDeviceAuthorizedContext = "SessionRunningAndDeviceAuthorizedContext"
var CapturingStillImageContext = "CapturingStillImageContext"
@available(iOS 4.0, *)
public func fileOutput(_ captureOutput: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from connections: [AVCaptureConnection], error: Error?) {
}
// MARK: property
var sessionQueue: DispatchQueue!
var session: AVCaptureSession?
var videoDeviceInput: AVCaptureDeviceInput?
@objc var stillImageOutput: AVCaptureStillImageOutput?
var deviceAuthorized: Bool = false
var backgroundRecordId: UIBackgroundTaskIdentifier = UIBackgroundTaskInvalid
var sessionRunningAndDeviceAuthorized: Bool {
get {
return (self.session?.isRunning != nil && self.deviceAuthorized )
}
}
var runtimeErrorHandlingObserver: AnyObject?
var lockInterfaceRotation: Bool = false
@IBOutlet weak var previewView: AVCamPreviewView!
@IBOutlet weak var snapButton: UIButton!
@IBOutlet weak var cameraButton: UIButton!
var snappedimage = UIImage()
override func viewDidLoad() {
super.viewDidLoad()
let session: AVCaptureSession = AVCaptureSession()
session.sessionPreset = AVCaptureSession.Preset.photo
self.session = session
self.previewView.session = session
self.checkDeviceAuthorizationStatus()
let sessionQueue: DispatchQueue = DispatchQueue(label: "KehoeGames.whatever",attributes: [])
self.sessionQueue = sessionQueue
sessionQueue.async {
self.backgroundRecordId = UIBackgroundTaskInvalid
let videoDevice: AVCaptureDevice! = ViewController.deviceWithMediaType(AVMediaType.video.rawValue, preferringPosition: AVCaptureDevice.Position.back)
var error: NSError? = nil
var videoDeviceInput: AVCaptureDeviceInput?
do {
videoDeviceInput = try AVCaptureDeviceInput(device: videoDevice)
} catch let error1 as NSError {
error = error1
videoDeviceInput = nil
} catch {
fatalError()
}
if (error != nil) {
print(error)
let alert = UIAlertController(title: "Error", message: error!.localizedDescription
, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
if session.canAddInput(videoDeviceInput!){
session.addInput(videoDeviceInput!)
self.videoDeviceInput = videoDeviceInput
DispatchQueue.main.async {
let orientation: AVCaptureVideoOrientation = AVCaptureVideoOrientation(rawValue: UIDevice.current.orientation.rawValue)!
(self.previewView.layer as! AVCaptureVideoPreviewLayer).connection?.videoOrientation = .portrait
(self.previewView.layer as! AVCaptureVideoPreviewLayer).videoGravity = AVLayerVideoGravity.resizeAspectFill
}
}
//Audio
let stillImageOutput: AVCaptureStillImageOutput = AVCaptureStillImageOutput()
if session.canAddOutput(stillImageOutput) {
stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
session.addOutput(stillImageOutput)
self.stillImageOutput = stillImageOutput
}
}
}
override func viewWillAppear(_ animated: Bool) {
self.sessionQueue.async {
self.addObserver(self, forKeyPath: "sessionRunningAndDeviceAuthorized", options: [.old , .new] , context: &SessionRunningAndDeviceAuthorizedContext)
self.addObserver(self, forKeyPath: "stillImageOutput.capturingStillImage", options:[.old , .new], context: &CapturingStillImageContext)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.subjectAreaDidChange(_:)), name: NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object: self.videoDeviceInput?.device)
self.runtimeErrorHandlingObserver = NotificationCenter.default.addObserver(forName: NSNotification.Name.AVCaptureSessionRuntimeError, object: self.session, queue: nil) {
(note: Notification?) in
self.sessionQueue.async { [unowned self] in
if let sess = self.session {
sess.startRunning()
}
}
}
self.session?.startRunning()
}
}
override func viewWillDisappear(_ animated: Bool) {
self.sessionQueue.async {
if let sess = self.session {
sess.stopRunning()
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object: self.videoDeviceInput?.device)
NotificationCenter.default.removeObserver(self.runtimeErrorHandlingObserver!)
self.removeObserver(self, forKeyPath: "sessionRunningAndDeviceAuthorized", context: &SessionRunningAndDeviceAuthorizedContext)
self.removeObserver(self, forKeyPath: "stillImageOutput.capturingStillImage", context: &CapturingStillImageContext)
}
}
}
override var shouldAutorotate : Bool {
return !self.lockInterfaceRotation
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if context == &CapturingStillImageContext{
let isCapturingStillImage: Bool = (change![NSKeyValueChangeKey.newKey]! as AnyObject).boolValue
if isCapturingStillImage {
self.runStillImageCaptureAnimation()
}
}else {
return super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
}
}
@objc func subjectAreaDidChange(_ notification: Notification){
let devicePoint: CGPoint = CGPoint(x: 0.5, y: 0.5)
self.focusWithMode(AVCaptureDevice.FocusMode.continuousAutoFocus, exposureMode: AVCaptureDevice.ExposureMode.continuousAutoExposure, point: devicePoint, monitorSubjectAreaChange: false)
}
// MARK: Custom Function
func focusWithMode(_ focusMode:AVCaptureDevice.FocusMode, exposureMode:AVCaptureDevice.ExposureMode, point:CGPoint, monitorSubjectAreaChange:Bool){
self.sessionQueue.async {
let device: AVCaptureDevice! = self.videoDeviceInput!.device
do {
try device.lockForConfiguration()
if device.isFocusPointOfInterestSupported && device.isFocusModeSupported(focusMode){
device.focusMode = focusMode
device.focusPointOfInterest = point
}
if device.isExposurePointOfInterestSupported && device.isExposureModeSupported(exposureMode){
device.exposurePointOfInterest = point
device.exposureMode = exposureMode
}
device.isSubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange
device.unlockForConfiguration()
} catch {
print(error)
}
}
}
class func setFlashMode(_ flashMode: AVCaptureDevice.FlashMode, device: AVCaptureDevice){
if device.hasFlash && device.isFlashModeSupported(flashMode) {
var error: NSError? = nil
do {
try device.lockForConfiguration()
device.flashMode = flashMode
device.unlockForConfiguration()
} catch let error1 as NSError {
error = error1
print(error)
}
}
}
func runStillImageCaptureAnimation(){
DispatchQueue.main.async {
self.previewView.layer.opacity = 0.0
UIView.animate(withDuration: 0.25, animations: {
self.previewView.layer.opacity = 1.0
})
}
}
class func deviceWithMediaType(_ mediaType: String, preferringPosition:AVCaptureDevice.Position) -> AVCaptureDevice? {
var devices = AVCaptureDevice.devices(for: AVMediaType(rawValue: mediaType));
if (devices.isEmpty) {
print("This device has no camera. Probably the simulator.")
return nil
} else {
var captureDevice: AVCaptureDevice = devices[0]
for device in devices {
if (device as AnyObject).position == preferringPosition {
captureDevice = device
break
}
}
return captureDevice
}
}
func checkDeviceAuthorizationStatus(){
let mediaType:String = AVMediaType.video.rawValue;
AVCaptureDevice.requestAccess(for: AVMediaType(rawValue: mediaType)) { (granted: Bool) in
if granted {
self.deviceAuthorized = true;
} else {
DispatchQueue.main.async {
let alert: UIAlertController = UIAlertController(
title: "AVCam",
message: "AVCam does not have permission to access camera",
preferredStyle: UIAlertControllerStyle.alert)
let action = UIAlertAction(title: "OK", style: .default) { _ in }
alert.addAction(action)
self.present(alert, animated: true, completion: nil)
}
self.deviceAuthorized = false;
}
}
}
var snaptrue = false
@IBAction func snapStillImage(_ sender: AnyObject) {
if snaptrue == false {
snaptrue = true
self.sessionQueue.async {
// Update the orientation on the still image output video connection before capturing.
let videoOrientation = (self.previewView.layer as! AVCaptureVideoPreviewLayer).connection?.videoOrientation
self.stillImageOutput!.connection(with: AVMediaType.video)?.videoOrientation = videoOrientation!
// Flash set to Auto for Still Capture
MeChoosePic.setFlashMode(AVCaptureDevice.FlashMode.off, device: self.videoDeviceInput!.device)
self.stillImageOutput!.captureStillImageAsynchronously(from: self.stillImageOutput!.connection(with:AVMediaType.video)!, completionHandler: { (imageDataSampleBuffer: CMSampleBuffer?, error: Error?) in
if error == nil {
let data:Data = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageDataSampleBuffer!)!
//PNG
let imagesnap:UIImage = UIImage(data: data)!
self.snappedimage = imagesnap
Timer.scheduledTimer(timeInterval: 1.3, target: self, selector: #selector(self.move), userInfo: nil, repeats: false)
} else {
print(error)
}
})
}
}
}
@IBAction func changeCamera(_ sender: AnyObject) {
self.cameraButton.isEnabled = false
self.snapButton.isEnabled = false
self.sessionQueue.async {
let currentVideoDevice:AVCaptureDevice = self.videoDeviceInput!.device
let currentPosition: AVCaptureDevice.Position = currentVideoDevice.position
var preferredPosition: AVCaptureDevice.Position = AVCaptureDevice.Position.unspecified
switch currentPosition {
case AVCaptureDevice.Position.front:
preferredPosition = AVCaptureDevice.Position.back
case AVCaptureDevice.Position.back:
preferredPosition = AVCaptureDevice.Position.front
case AVCaptureDevice.Position.unspecified:
preferredPosition = AVCaptureDevice.Position.back
}
guard let device:AVCaptureDevice? = MeChoosePic.deviceWithMediaType(AVMediaType.video.rawValue, preferringPosition: preferredPosition) else {
print("there is no AVCapture Device")
return
}
var videoDeviceInput: AVCaptureDeviceInput?
do {
videoDeviceInput = try AVCaptureDeviceInput(device: device!)
} catch _ as NSError {
videoDeviceInput = nil
} catch {
fatalError()
}
self.session!.beginConfiguration()
self.session!.removeInput(self.videoDeviceInput!)
if self.session!.canAddInput(videoDeviceInput!) {
NotificationCenter.default.removeObserver(self, name:NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object:currentVideoDevice)
ViewController.setFlashMode(AVCaptureDevice.FlashMode.auto, device: device!)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.subjectAreaDidChange(_:)), name: NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object: device)
self.session!.addInput(videoDeviceInput!)
self.videoDeviceInput = videoDeviceInput
} else {
self.session!.addInput(self.videoDeviceInput!)
}
self.session!.commitConfiguration()
DispatchQueue.main.async {
self.snapButton.isEnabled = true
self.cameraButton.isEnabled = true
}
}
}
@IBAction func focusAndExposeTap(_ gestureRecognizer: UIGestureRecognizer) {
let devicePoint: CGPoint = (self.previewView.layer as! AVCaptureVideoPreviewLayer).captureDevicePointConverted(fromLayerPoint: gestureRecognizer.location(in: gestureRecognizer.view))
self.focusWithMode(AVCaptureDevice.FocusMode.autoFocus, exposureMode: AVCaptureDevice.ExposureMode.autoExpose, point: devicePoint, monitorSubjectAreaChange: true)
}
并且在 AVCamPreviewView 中：
import Foundation
import UIKit
import AVFoundation
class AVCamPreviewView: UIView {
var session: AVCaptureSession? {
get {
return (self.layer as! AVCaptureVideoPreviewLayer).session
}
set (session) {
(self.layer as! AVCaptureVideoPreviewLayer).session = session
}
}
override class var layerClass : AnyClass {
return AVCaptureVideoPreviewLayer.self
}
}
您还需要选择相机胶卷中已拍摄照片的选项吗？ - 您只需要创建一个 Collection View 并将所有图像提取到其中。请告诉我！
尼尔
我有一个 allowsEditing = true 的 ImagePickerController。但我想在编辑屏幕中有更多选项，而不仅仅是调整大小模式。我该如何改进它？
您无法改进本机 image/video 编辑屏幕。如果您需要更多选项，则需要创建自己的控制器来接受原始相机输出并对其进行编辑。
我同意@Lope 你可以通过收集相机输入来制作你自己的：
import UIKit
import AVFoundation
import AssetsLibrary
class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {
var SessionRunningAndDeviceAuthorizedContext = "SessionRunningAndDeviceAuthorizedContext"
var CapturingStillImageContext = "CapturingStillImageContext"
@available(iOS 4.0, *)
public func fileOutput(_ captureOutput: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from connections: [AVCaptureConnection], error: Error?) {
}
// MARK: property
var sessionQueue: DispatchQueue!
var session: AVCaptureSession?
var videoDeviceInput: AVCaptureDeviceInput?
@objc var stillImageOutput: AVCaptureStillImageOutput?
var deviceAuthorized: Bool = false
var backgroundRecordId: UIBackgroundTaskIdentifier = UIBackgroundTaskInvalid
var sessionRunningAndDeviceAuthorized: Bool {
get {
return (self.session?.isRunning != nil && self.deviceAuthorized )
}
}
var runtimeErrorHandlingObserver: AnyObject?
var lockInterfaceRotation: Bool = false
@IBOutlet weak var previewView: AVCamPreviewView!
@IBOutlet weak var snapButton: UIButton!
@IBOutlet weak var cameraButton: UIButton!
var snappedimage = UIImage()
override func viewDidLoad() {
super.viewDidLoad()
let session: AVCaptureSession = AVCaptureSession()
session.sessionPreset = AVCaptureSession.Preset.photo
self.session = session
self.previewView.session = session
self.checkDeviceAuthorizationStatus()
let sessionQueue: DispatchQueue = DispatchQueue(label: "KehoeGames.whatever",attributes: [])
self.sessionQueue = sessionQueue
sessionQueue.async {
self.backgroundRecordId = UIBackgroundTaskInvalid
let videoDevice: AVCaptureDevice! = ViewController.deviceWithMediaType(AVMediaType.video.rawValue, preferringPosition: AVCaptureDevice.Position.back)
var error: NSError? = nil
var videoDeviceInput: AVCaptureDeviceInput?
do {
videoDeviceInput = try AVCaptureDeviceInput(device: videoDevice)
} catch let error1 as NSError {
error = error1
videoDeviceInput = nil
} catch {
fatalError()
}
if (error != nil) {
print(error)
let alert = UIAlertController(title: "Error", message: error!.localizedDescription
, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
if session.canAddInput(videoDeviceInput!){
session.addInput(videoDeviceInput!)
self.videoDeviceInput = videoDeviceInput
DispatchQueue.main.async {
let orientation: AVCaptureVideoOrientation = AVCaptureVideoOrientation(rawValue: UIDevice.current.orientation.rawValue)!
(self.previewView.layer as! AVCaptureVideoPreviewLayer).connection?.videoOrientation = .portrait
(self.previewView.layer as! AVCaptureVideoPreviewLayer).videoGravity = AVLayerVideoGravity.resizeAspectFill
}
}
//Audio
let stillImageOutput: AVCaptureStillImageOutput = AVCaptureStillImageOutput()
if session.canAddOutput(stillImageOutput) {
stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
session.addOutput(stillImageOutput)
self.stillImageOutput = stillImageOutput
}
}
}
override func viewWillAppear(_ animated: Bool) {
self.sessionQueue.async {
self.addObserver(self, forKeyPath: "sessionRunningAndDeviceAuthorized", options: [.old , .new] , context: &SessionRunningAndDeviceAuthorizedContext)
self.addObserver(self, forKeyPath: "stillImageOutput.capturingStillImage", options:[.old , .new], context: &CapturingStillImageContext)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.subjectAreaDidChange(_:)), name: NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object: self.videoDeviceInput?.device)
self.runtimeErrorHandlingObserver = NotificationCenter.default.addObserver(forName: NSNotification.Name.AVCaptureSessionRuntimeError, object: self.session, queue: nil) {
(note: Notification?) in
self.sessionQueue.async { [unowned self] in
if let sess = self.session {
sess.startRunning()
}
}
}
self.session?.startRunning()
}
}
override func viewWillDisappear(_ animated: Bool) {
self.sessionQueue.async {
if let sess = self.session {
sess.stopRunning()
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object: self.videoDeviceInput?.device)
NotificationCenter.default.removeObserver(self.runtimeErrorHandlingObserver!)
self.removeObserver(self, forKeyPath: "sessionRunningAndDeviceAuthorized", context: &SessionRunningAndDeviceAuthorizedContext)
self.removeObserver(self, forKeyPath: "stillImageOutput.capturingStillImage", context: &CapturingStillImageContext)
}
}
}
override var shouldAutorotate : Bool {
return !self.lockInterfaceRotation
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if context == &CapturingStillImageContext{
let isCapturingStillImage: Bool = (change![NSKeyValueChangeKey.newKey]! as AnyObject).boolValue
if isCapturingStillImage {
self.runStillImageCaptureAnimation()
}
}else {
return super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
}
}
@objc func subjectAreaDidChange(_ notification: Notification){
let devicePoint: CGPoint = CGPoint(x: 0.5, y: 0.5)
self.focusWithMode(AVCaptureDevice.FocusMode.continuousAutoFocus, exposureMode: AVCaptureDevice.ExposureMode.continuousAutoExposure, point: devicePoint, monitorSubjectAreaChange: false)
}
// MARK: Custom Function
func focusWithMode(_ focusMode:AVCaptureDevice.FocusMode, exposureMode:AVCaptureDevice.ExposureMode, point:CGPoint, monitorSubjectAreaChange:Bool){
self.sessionQueue.async {
let device: AVCaptureDevice! = self.videoDeviceInput!.device
do {
try device.lockForConfiguration()
if device.isFocusPointOfInterestSupported && device.isFocusModeSupported(focusMode){
device.focusMode = focusMode
device.focusPointOfInterest = point
}
if device.isExposurePointOfInterestSupported && device.isExposureModeSupported(exposureMode){
device.exposurePointOfInterest = point
device.exposureMode = exposureMode
}
device.isSubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange
device.unlockForConfiguration()
} catch {
print(error)
}
}
}
class func setFlashMode(_ flashMode: AVCaptureDevice.FlashMode, device: AVCaptureDevice){
if device.hasFlash && device.isFlashModeSupported(flashMode) {
var error: NSError? = nil
do {
try device.lockForConfiguration()
device.flashMode = flashMode
device.unlockForConfiguration()
} catch let error1 as NSError {
error = error1
print(error)
}
}
}
func runStillImageCaptureAnimation(){
DispatchQueue.main.async {
self.previewView.layer.opacity = 0.0
UIView.animate(withDuration: 0.25, animations: {
self.previewView.layer.opacity = 1.0
})
}
}
class func deviceWithMediaType(_ mediaType: String, preferringPosition:AVCaptureDevice.Position) -> AVCaptureDevice? {
var devices = AVCaptureDevice.devices(for: AVMediaType(rawValue: mediaType));
if (devices.isEmpty) {
print("This device has no camera. Probably the simulator.")
return nil
} else {
var captureDevice: AVCaptureDevice = devices[0]
for device in devices {
if (device as AnyObject).position == preferringPosition {
captureDevice = device
break
}
}
return captureDevice
}
}
func checkDeviceAuthorizationStatus(){
let mediaType:String = AVMediaType.video.rawValue;
AVCaptureDevice.requestAccess(for: AVMediaType(rawValue: mediaType)) { (granted: Bool) in
if granted {
self.deviceAuthorized = true;
} else {
DispatchQueue.main.async {
let alert: UIAlertController = UIAlertController(
title: "AVCam",
message: "AVCam does not have permission to access camera",
preferredStyle: UIAlertControllerStyle.alert)
let action = UIAlertAction(title: "OK", style: .default) { _ in }
alert.addAction(action)
self.present(alert, animated: true, completion: nil)
}
self.deviceAuthorized = false;
}
}
}
var snaptrue = false
@IBAction func snapStillImage(_ sender: AnyObject) {
if snaptrue == false {
snaptrue = true
self.sessionQueue.async {
// Update the orientation on the still image output video connection before capturing.
let videoOrientation = (self.previewView.layer as! AVCaptureVideoPreviewLayer).connection?.videoOrientation
self.stillImageOutput!.connection(with: AVMediaType.video)?.videoOrientation = videoOrientation!
// Flash set to Auto for Still Capture
MeChoosePic.setFlashMode(AVCaptureDevice.FlashMode.off, device: self.videoDeviceInput!.device)
self.stillImageOutput!.captureStillImageAsynchronously(from: self.stillImageOutput!.connection(with:AVMediaType.video)!, completionHandler: { (imageDataSampleBuffer: CMSampleBuffer?, error: Error?) in
if error == nil {
let data:Data = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageDataSampleBuffer!)!
//PNG
let imagesnap:UIImage = UIImage(data: data)!
self.snappedimage = imagesnap
Timer.scheduledTimer(timeInterval: 1.3, target: self, selector: #selector(self.move), userInfo: nil, repeats: false)
} else {
print(error)
}
})
}
}
}
@IBAction func changeCamera(_ sender: AnyObject) {
self.cameraButton.isEnabled = false
self.snapButton.isEnabled = false
self.sessionQueue.async {
let currentVideoDevice:AVCaptureDevice = self.videoDeviceInput!.device
let currentPosition: AVCaptureDevice.Position = currentVideoDevice.position
var preferredPosition: AVCaptureDevice.Position = AVCaptureDevice.Position.unspecified
switch currentPosition {
case AVCaptureDevice.Position.front:
preferredPosition = AVCaptureDevice.Position.back
case AVCaptureDevice.Position.back:
preferredPosition = AVCaptureDevice.Position.front
case AVCaptureDevice.Position.unspecified:
preferredPosition = AVCaptureDevice.Position.back
}
guard let device:AVCaptureDevice? = MeChoosePic.deviceWithMediaType(AVMediaType.video.rawValue, preferringPosition: preferredPosition) else {
print("there is no AVCapture Device")
return
}
var videoDeviceInput: AVCaptureDeviceInput?
do {
videoDeviceInput = try AVCaptureDeviceInput(device: device!)
} catch _ as NSError {
videoDeviceInput = nil
} catch {
fatalError()
}
self.session!.beginConfiguration()
self.session!.removeInput(self.videoDeviceInput!)
if self.session!.canAddInput(videoDeviceInput!) {
NotificationCenter.default.removeObserver(self, name:NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object:currentVideoDevice)
ViewController.setFlashMode(AVCaptureDevice.FlashMode.auto, device: device!)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.subjectAreaDidChange(_:)), name: NSNotification.Name.AVCaptureDeviceSubjectAreaDidChange, object: device)
self.session!.addInput(videoDeviceInput!)
self.videoDeviceInput = videoDeviceInput
} else {
self.session!.addInput(self.videoDeviceInput!)
}
self.session!.commitConfiguration()
DispatchQueue.main.async {
self.snapButton.isEnabled = true
self.cameraButton.isEnabled = true
}
}
}
@IBAction func focusAndExposeTap(_ gestureRecognizer: UIGestureRecognizer) {
let devicePoint: CGPoint = (self.previewView.layer as! AVCaptureVideoPreviewLayer).captureDevicePointConverted(fromLayerPoint: gestureRecognizer.location(in: gestureRecognizer.view))
self.focusWithMode(AVCaptureDevice.FocusMode.autoFocus, exposureMode: AVCaptureDevice.ExposureMode.autoExpose, point: devicePoint, monitorSubjectAreaChange: true)
}
并且在 AVCamPreviewView 中：
import Foundation
import UIKit
import AVFoundation
class AVCamPreviewView: UIView {
var session: AVCaptureSession? {
get {
return (self.layer as! AVCaptureVideoPreviewLayer).session
}
set (session) {
(self.layer as! AVCaptureVideoPreviewLayer).session = session
}
}
override class var layerClass : AnyClass {
return AVCaptureVideoPreviewLayer.self
}
}
您还需要选择相机胶卷中已拍摄照片的选项吗？ - 您只需要创建一个 Collection View 并将所有图像提取到其中。请告诉我！
尼尔