本文实例为大家分享了iOS 10自定义相机功能的具体代码，供大家参考，具体内容如下

直接上代码

//
// TGCameraVC.swift
// TGPhotoPicker
//
// Created by targetcloud on 2017/7/25.
// Copyright © 2017年 targetcloud. All rights reserved.
//

import UIKit
import AVFoundation
import Photos

@available(iOS 10.0,*)
class TGCameraVC: UIViewController {

 var callbackPicutureData: ((Data?) -> ())?

 private var device: AVCaptureDevice?
 private var input: AVCaptureDeviceInput?
 private var imageOutput: AVCapturePhotoOutput?
 private var session: AVCaptureSession?
 private var previewLayer: AVCaptureVideoPreviewLayer?
 fileprivate var showImageContainerView: UIView?
 fileprivate var showImageView: UIImageView?
 fileprivate var picData: Data?
 private var flashMode: AVCaptureFlashMode = .auto
 private weak var flashButton: UIButton?

 override func viewDidLoad() {
  super.viewDidLoad()

  setupCamera()
  setupUI()

  if #available(iOS 9.0,*) {
   let isVCBased = Bundle.main.infoDictionary?["UIViewControllerBasedStatusBarAppearance"] as? Bool ?? false
   if !isVCBased{
    UIApplication.shared.setStatusBarHidden(false,with: .none)
   }
  }else {
   UIApplication.shared.statusBarStyle = .lightContent
   UIApplication.shared.setStatusBarHidden(false,with: .none)
  }
 }

 override var prefeRSStatusBarHidden: Bool{
  return false
 }

 override var preferredStatusBarStyle: UIStatusBarStyle {
  return .lightContent
 }

 private func setupCamera() {
  AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo) { success in
   if !success {
    let alertVC = UIAlertController(title: TGPhotoPickerConfig.shared.cameraUsage,message: TGPhotoPickerConfig.shared.cameraUsageTip,preferredStyle: .actionSheet)
    alertVC.addAction(UIAlertAction(title: TGPhotoPickerConfig.shared.confirmTitle,style: .default,handler: nil))
    self.present(alertVC,animated: true,completion: nil)
   }
  }
  device = cameraWithPosistion(.back)
  input = try? AVCaptureDeviceInput(device: device)
  guard input != nil else {
   return
  }

  imageOutput = AVCapturePhotoOutput()
  session = AVCaptureSession()
  session?.beginConfiguration()
  session?.sessionPreset = TGPhotoPickerConfig.shared.sessionPreset
  if session!.canAddInput(input) {
   session!.addInput(input)
  }
  if session!.canAddOutput(imageOutput) {
   session!.addOutput(imageOutput)
  }
  previewLayer = AVCaptureVideoPreviewLayer(session: session)
  previewLayer?.frame = view.bounds
  previewLayer?.videoGravity = TGPhotoPickerConfig.shared.videoGravity
  view.layer.addSublayer(previewLayer!)
  session?.commitConfiguration()
  session?.startRunning()
 }

 private func cameraWithPosistion(_ position: AVCaptureDevicePosition) -> AVCaptureDevice {
  let type = AVCaptureDeviceType(rawValue: TGPhotoPickerConfig.shared.captureDeviceType.rawValue)
  return AVCaptureDevice.defaultDevice(withDeviceType: type,mediaType: AVMediaTypeVideo,position: position)
 }

 private func setupUI() {
  let takeButton = UIButton(frame: CGRect(x: 0,y: 0,width: TGPhotoPickerConfig.shared.takeWH,height: TGPhotoPickerConfig.shared.takeWH))
  takeButton.center = CGPoint(x: UIScreen.main.bounds.width / 2,y: UIScreen.main.bounds.height - TGPhotoPickerConfig.shared.buttonEdge.bottom)
  takeButton.setImage(UIImage.size(width: TGPhotoPickerConfig.shared.takeWH,height: TGPhotoPickerConfig.shared.takeWH).border(width: 3).border(color: .white).color(.clear).corner(radius: TGPhotoPickerConfig.shared.takeWH / 2).image +
   UIImage.size(width: TGPhotoPickerConfig.shared.takeWH - 10,height: TGPhotoPickerConfig.shared.takeWH - 10).color(UIColor(white: 0.95,alpha: 1) ).corner(radius: (TGPhotoPickerConfig.shared.takeWH - 10) / 2).image,for: .normal)
  takeButton.setImage(UIImage.size(width: TGPhotoPickerConfig.shared.takeWH,height: TGPhotoPickerConfig.shared.takeWH - 10).color(UIColor(white: 0.8,for: .highlighted)
  takeButton.addTarget(self,action: #selector(takePhotoAction),for: .touchUpInside)
  view.addSubview(takeButton)

  let cameraChangeButton = UIButton(frame: CGRect(x: 0,width: TGPhotoPickerConfig.shared.takeWH * 0.6,height: TGPhotoPickerConfig.shared.takeWH * 0.6))
  cameraChangeButton.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("camera"),for: .normal)
  cameraChangeButton.center = CGPoint(x: UIScreen.main.bounds.width - TGPhotoPickerConfig.shared.buttonEdge.right,y: takeButton.center.y)
  cameraChangeButton.addTarget(self,action: #selector(changeCameraPositionAction),for: .touchUpInside)
  cameraChangeButton.contentMode = .scaleAspectFit
  view.addSubview(cameraChangeButton)

  let flashChangeButton = UIButton(frame: CGRect(x: 0,width: TGPhotoPickerConfig.shared.takeWH * 0.5,height: TGPhotoPickerConfig.shared.takeWH * 0.5))
  flashChangeButton.center = CGPoint(x: cameraChangeButton.center.x,y: TGPhotoPickerConfig.shared.buttonEdge.top)
  flashChangeButton.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flashauto"),for: .normal)
  flashChangeButton.addTarget(self,action: #selector(flashChangeAction),for: .touchUpInside)
  flashChangeButton.contentMode = .scaleAspectFit
  flashButton = flashChangeButton
  view.addSubview(flashChangeButton)

  let backButton = UIButton(frame: CGRect(x: 0,width: TGPhotoPickerConfig.shared.takeWH * 0.4,height: TGPhotoPickerConfig.shared.takeWH * 0.4))
  backButton.center = CGPoint(x: TGPhotoPickerConfig.shared.buttonEdge.left,y: flashChangeButton.center.y)
  backButton.setImage(UIImage.size(width: TGPhotoPickerConfig.shared.takeWH * 0.4,height: TGPhotoPickerConfig.shared.takeWH * 0.4)
   .corner(radius: TGPhotoPickerConfig.shared.takeWH * 0.2)
   .color(.clear)
   .border(color: UIColor.white.withAlphaComponent(0.7))
   .border(width: TGPhotoPickerConfig.shared.isShowBorder ? TGPhotoPickerConfig.shared.checkBoxLineW : 0)
   .image
   .with({ context in
    context.setLineCap(.round)
    UIColor.white.setStroke()
    context.setLineWidth(TGPhotoPickerConfig.shared.checkBoxLineW)
    let WH = TGPhotoPickerConfig.shared.takeWH * 0.4
    context.move(to: CGPoint(x: WH * 0.6,y: WH * 0.2))
    context.addLine(to: CGPoint(x: WH * 0.35,y: WH * 0.5))
    context.move(to: CGPoint(x: WH * 0.35,y: WH * 0.5))
    context.addLine(to: CGPoint(x: WH * 0.6,y: WH * 0.8))
    context.strokePath()
   }),for: .normal)
  backButton.contentMode = .scaleAspectFit
  backButton.addTarget(self,action: #selector(backAction),for: .touchUpInside)
  view.addSubview(backButton)

  showImageContainerView = UIView(frame: view.bounds)
  showImageContainerView?.backgroundColor = TGPhotoPickerConfig.shared.previewBGColor
  view.addSubview(showImageContainerView!)

  let height = showImageContainerView!.bounds.height - TGPhotoPickerConfig.shared.takeWH - TGPhotoPickerConfig.shared.buttonEdge.bottom - TGPhotoPickerConfig.shared.previewPadding * 2
  showImageView = UIImageView(frame: CGRect(x: TGPhotoPickerConfig.shared.previewPadding,y: TGPhotoPickerConfig.shared.previewPadding * 2,width: showImageContainerView!.bounds.width - 2 * TGPhotoPickerConfig.shared.previewPadding,height: height))
  showImageView?.contentMode = .scaleAspectFit
  showImageContainerView?.addSubview(showImageView!)
  showImageContainerView?.isHidden = true

  let giveupButton = createImageOperatorButton(nil,CGPoint(x: TGPhotoPickerConfig.shared.takeWH * 1.5,y: showImageContainerView!.bounds.height - TGPhotoPickerConfig.shared.takeWH * 1.5),TGPhotoPickerConfig.shared.getCheckBoxImage(true,true,.circle,TGPhotoPickerConfig.shared.takeWH * 0.7).unselect)
  giveupButton.addTarget(self,action: #selector(giveupImageAction),for: .touchUpInside)
  showImageContainerView?.addSubview(giveupButton)

  let ensureButton = createImageOperatorButton(nil,CGPoint(x: showImageContainerView!.bounds.width - TGPhotoPickerConfig.shared.takeWH * 1.5,false,TGPhotoPickerConfig.shared.takeWH * 0.7).select)
  ensureButton.addTarget(self,action: #selector(useImageAction),for: .touchUpInside)
  showImageContainerView?.addSubview(ensureButton)
 }

 private func createImageOperatorButton(_ title: String?,_ center: CGPoint,_ img: UIImage?) -> UIButton {
  let btn = UIButton(frame: CGRect(x: 0,width: TGPhotoPickerConfig.shared.takeWH * 0.7,height: TGPhotoPickerConfig.shared.takeWH * 0.7))
  btn.center = center
  btn.setTitle(title,for: .normal)
  btn.setImage(img,for: .normal)
  btn.contentMode = .scaleAspectFit
  return btn
 }

 @objc private func flashChangeAction() {
  switch flashMode {
  case .auto:
   flashMode = .on
   flashButton?.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flash"),for: .normal)
  case .on:
   flashMode = .off
   flashButton?.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flashno"),for: .normal)
  case .off:
   flashMode = .auto
   flashButton?.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flashauto"),for: .normal)
  }
 }

 @objc private func backAction() {
  dismiss(animated: true,completion: nil)
 }

 @objc private func takePhotoAction() {
  let connection = imageOutput?.connection(withMediaType: AVMediaTypeVideo)
  guard connection != nil else {
   return
  }
  let photoSettings = AVCapturePhotoSettings()
  photoSettings.flashMode = flashMode
  imageOutput?.capturePhoto(with: photoSettings,delegate: self)
 }

 @objc private func changeCameraPositionAction() {
  let animation = CATransition()
  animation.duration = 0.5
  animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaSEOut)
  animation.type = TGPhotoPickerConfig.shared.transitionType

  let newDevice: AVCaptureDevice!
  let newInput: AVCaptureDeviceInput?
  let position = input?.device.position
  if position == .front {
   newDevice = cameraWithPosistion(.back)
   animation.subtype = kCATransitionFromLeft
  } else {
   newDevice = cameraWithPosistion(.front)
   animation.subtype = kCATransitionFromRight
  }
  newInput = try? AVCaptureDeviceInput(device: newDevice)
  guard newInput != nil else{
   return
  }

  previewLayer?.add(animation,forKey: nil)

  session?.beginConfiguration()
  session?.removeInput(input)
  if session!.canAddInput(newInput) {
   session?.addInput(newInput!)
   input = newInput
  } else {
   session?.addInput(input)
  }
  session?.commitConfiguration()
 }

 @objc private func giveupImageAction() {
  showImageView?.image = UIImage()
  showImageContainerView?.isHidden = true
 }

 @objc private func useImageAction() {
  callbackPicutureData?(picData)
  dismiss(animated: true,completion: nil)
 }
}

@available(iOS 10.0,*)
extension TGCameraVC: AVCapturePhotoCaptureDelegate {
 func capture(_ captureOutput: AVCapturePhotoOutput,didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?,previewPhotoSampleBuffer: CMSampleBuffer?,resolvedSettings: AVCaptureResolvedPhotoSettings,bracketSettings: AVCaptureBracketedStillImageSettings?,error: Error?) {
  if error != nil {
   print("error = \(String(describing: error?.localizedDescription))")
  } else {
   if let imageData = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: photoSampleBuffer!,previewPhotoSampleBuffer: previewPhotoSampleBuffer){
    picData = imageData
    showImageContainerView?.isHidden = false
    showImageView?.image = UIImage(data: imageData)
    if TGPhotoPickerConfig.shared.saveImageToPhotoAlbum{
     self.saveImageToPhotoAlbum(UIImage(data: imageData)!)
    }
   }
  }
 }

 fileprivate func saveImageToPhotoAlbum(_ savedImage:UIImage){
  UIImageWriteToSavedPhotosAlbum(savedImage,self,#selector(imageDidFinishSavingWithErrorContextInfo),nil)
 }

 @objc fileprivate func imageDidFinishSavingWithErrorContextInfo(image:UIImage,error:NSError?,contextInfo:UnsafeMutableRawPointer?){
  if canUseAlbum(){
   let msg = (error != nil) ? TGPhotoPickerConfig.shared.saveImageFailTip : TGPhotoPickerConfig.shared.saveImageSuccessTip
   let alert = UIAlertView(title: TGPhotoPickerConfig.shared.saveImageTip,message: msg,delegate: self,cancelButtonTitle: TGPhotoPickerConfig.shared.confirmTitle)
   alert.show()
  }
 }

 fileprivate func canUseAlbum()-> Bool{
  if PHPhotoLibrary.authorizationStatus() != PHAuthorizationStatus.authorized {
   let alertView = UIAlertView(title: TGPhotoPickerConfig.shared.PhotoLibraryUsage,message: TGPhotoPickerConfig.shared.PhotoLibraryUsageTip,delegate: nil,cancelButtonTitle: TGPhotoPickerConfig.shared.confirmTitle,otherButtonTitles: TGPhotoPickerConfig.shared.cancelTitle)
   alertView.tag = TGPhotoPickerConfig.shared.alertViewTag
   alertView.show()
   return false
  }else{
   return true
  }
 }
}

效果如下

完整使用DEMO见：点击打开链接

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