iOS8自定义相机（swift）
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iOS不同版本的自定义有所不同的，本文介绍iOS8下的自定义相机，所用语言为swift3+
//// TGCameraVCForiOS8.swift// TGPhotoPicker//// Created by targetcloud on 2017/8/11.// Copyright © 2017年 targetcloud. All rights reserved.//import UIKitimport AVFoundationimport Photosclass TGCameraVCForiOS8: UIViewController { var callbackPicutureData: ((Data?) -> ())? fileprivate var device: AVCaptureDevice? fileprivate lazy var session : AVCaptureSession = AVCaptureSession() fileprivate lazy var previewLayer : AVCaptureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: self.session) fileprivate lazy var imageOutput : AVCaptureStillImageOutput = AVCaptureStillImageOutput() fileprivate var input : AVCaptureDeviceInput? fileprivate var showImageContainerView: UIView? fileprivate var showImageView: UIImageView? fileprivate var flashMode: AVCaptureFlashMode = .auto fileprivate var picData: Data? fileprivate var image: UIImage? fileprivate lazy var takeButton: UIButton = { 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).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: 0.8, alpha: 1) ).corner(radius: (TGPhotoPickerConfig.shared.takeWH - 10) / 2).image, for: .highlighted) takeButton.addTarget(self, action: #selector(takePhotoAction), for: .touchUpInside) return takeButton }() fileprivate lazy var cameraChangeButton: UIButton = { let cameraChangeButton = UIButton(frame: CGRect(x: 0, y: 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: self.takeButton.center.y) cameraChangeButton.addTarget(self, action: #selector(changeCameraPositionAction), for: .touchUpInside) cameraChangeButton.contentMode = .scaleAspectFit return cameraChangeButton }() fileprivate lazy var flashButton: UIButton = { let flashChangeButton = UIButton(frame: CGRect(x: 0, y: 0, width: TGPhotoPickerConfig.shared.takeWH * 0.5, height: TGPhotoPickerConfig.shared.takeWH * 0.5)) flashChangeButton.center = CGPoint(x: self.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 return flashChangeButton }() @objc fileprivate func flashChangeAction(){ guard let device = device else { return } do { try device.lockForConfiguration() switch flashMode { case .auto: if device.isFlashModeSupported(.on) { device.flashMode = .on flashMode = .on flashButton.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flash"), for: .normal) } case .on: if device.isFlashModeSupported(.off) { device.flashMode = .off flashMode = .off flashButton.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flashno"), for: .normal) } case .off: if device.isFlashModeSupported(.auto) { device.flashMode = .auto flashMode = .auto flashButton.setImage(TGPhotoPickerConfig.getImageNo2x3xSuffix("flashauto"), for: .normal) } } device.unlockForConfiguration() } catch { return } } fileprivate func canUseCamera()-> Bool{ let authStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo) if authStatus == .denied{ let alertView = UIAlertView(title: TGPhotoPickerConfig.shared.cameraUsage, message: TGPhotoPickerConfig.shared.cameraUsageTip, delegate: self, cancelButtonTitle: TGPhotoPickerConfig.shared.confirmTitle, otherButtonTitles: TGPhotoPickerConfig.shared.cancelTitle) alertView.tag = TGPhotoPickerConfig.shared.alertViewTag alertView.show() return false }else{ return true } } fileprivate func canUseAlbum()-> Bool{ if PHPhotoLibrary.authorizationStatus() != PHAuthorizationStatus.authorized { let alertView = UIAlertView(title: TGPhotoPickerConfig.shared.PhotoLibraryUsage, message: TGPhotoPickerConfig.shared.PhotoLibraryUsageTip, delegate: self, cancelButtonTitle: TGPhotoPickerConfig.shared.confirmTitle, otherButtonTitles: TGPhotoPickerConfig.shared.cancelTitle) alertView.tag = TGPhotoPickerConfig.shared.alertViewTag alertView.show() return false }else{ return true } } fileprivate lazy var focusView: UIView = { let focusView = UIView(frame: CGRect(x: 0, y: 0, width: TGPhotoPickerConfig.shared.focusViewWH, height: TGPhotoPickerConfig.shared.focusViewWH)) focusView.layer.borderWidth = 1.0 focusView.layer.borderColor = TGPhotoPickerConfig.shared.tinColor.cgColor focusView.backgroundColor = .clear focusView.isHidden = true return focusView }() override func viewDidLoad() { super.viewDidLoad() if canUseCamera() { setupCamera() setupUI() }else{ return } 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 } fileprivate func setupUI(){ self.view.addSubview(self.takeButton) self.view.addSubview(self.focusView) self.view.addSubview(self.cameraChangeButton) self.view.addSubview(self.flashButton) let backButton = UIButton(frame: CGRect(x: 0, y: 0, width: TGPhotoPickerConfig.shared.takeWH * 0.4, height: TGPhotoPickerConfig.shared.takeWH * 0.4)) backButton.center = CGPoint(x: TGPhotoPickerConfig.shared.buttonEdge.left , y: self.flashButton.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?.layer.masksToBounds = true 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, y: showImageContainerView!.bounds.height - TGPhotoPickerConfig.shared.takeWH * 1.5), TGPhotoPickerConfig.shared.getCheckboxImage(true, false, .circle, TGPhotoPickerConfig.shared.takeWH * 0.7).select) ensureButton.addTarget(self, action: #selector(useImageAction), for: .touchUpInside) showImageContainerView?.addSubview(ensureButton) let tapGesture = UITapGestureRecognizer(target: self, action: #selector(focusGesture)) self.view.addGestureRecognizer(tapGesture) } private func createImageOperatorButton(_ title: String?, _ center: CGPoint, _ img: UIImage?) -> UIButton { let btn = UIButton(frame: CGRect(x: 0, y: 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 backAction() { dismiss(animated: true, completion: nil) } @objc private func giveupImageAction() { showImageView?.image = UIImage() showImageContainerView?.isHidden = true } @objc private func useImageAction() { callbackPicutureData?(picData) dismiss(animated: true, completion: nil) } @objc fileprivate func focusGesture(gesture: UITapGestureRecognizer){ let point = gesture.location(in: gesture.view) focusAtPoint(point) } fileprivate func focusAtPoint(_ point: CGPoint){ let size = self.view.bounds.size let focusPoint = CGPoint(x: point.y/size.height, y: 1-point.x/size.width) do { try device?.lockForConfiguration() } catch { return } if device?.isFocusModeSupported(AVCaptureFocusMode.autoFocus) ?? false{ device?.focusPointOfInterest = focusPoint device?.focusMode = .autoFocus } if device?.isExposureModeSupported(AVCaptureExposureMode.autoExpose) ?? false{ device?.exposurePointOfInterest = focusPoint device?.exposureMode = .autoExpose } device?.unlockForConfiguration() focusView.center = point focusView.isHidden = false UIView.animate(withDuration: 0.3, animations: { self.focusView.transform = CGAffineTransform(scaleX: 1.25, y: 1.25) }) { (finished) in UIView.animate(withDuration: 0.5, animations: { self.focusView.transform = .identity }, completion: { (finished) in self.focusView.isHidden = true }) } } fileprivate func setupCamera(){ self.view.backgroundColor = .white setupVideo() } @objc fileprivate func changeCameraPositionAction() { let cameraCount = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo).count guard cameraCount>0 else { return } let rotaionAnim = CATransition() rotaionAnim.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut) rotaionAnim.type = TGPhotoPickerConfig.shared.transitionType rotaionAnim.duration = 0.5 guard let videoInput = input else { return } let position : AVCaptureDevicePosition = videoInput.device.position == .front ? .back : .front rotaionAnim.subtype = (position == .front) ? "fromRight" : "fromLeft" guard let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) as? [AVCaptureDevice] else { return } guard let newDevice = devices.filter({$0.position == position}).first else { return } guard let newVideoInput = try? AVCaptureDeviceInput(device: newDevice) else { return } previewLayer.add(rotaionAnim, forKey: nil) session.beginConfiguration() session.removeInput(videoInput) if session.canAddInput(newVideoInput) { session.addInput(newVideoInput) self.input = newVideoInput } else { session.addInput(input) } session.commitConfiguration() } @objc fileprivate func takePhotoAction(){ guard let videoConnection = imageOutput.connection(withMediaType: AVMediaTypeVideo) else { return } imageOutput.captureStillImageAsynchronously(from: videoConnection) { (imageDataSampleBuffer, error) in if error != nil { print("error = \(String(describing: error?.localizedDescription))") } else { guard imageDataSampleBuffer != nil else {return} guard let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageDataSampleBuffer) else {return} self.picData = imageData self.showImageContainerView?.isHidden = false self.image = UIImage(data: imageData) self.showImageView?.image = self.image if TGPhotoPickerConfig.shared.saveImageToPhotoAlbum{ self.saveImageToPhotoAlbum(self.image!) } print("image size\(String(describing: self.image?.size))") } } } 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 setupVideo() { guard let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) as? [AVCaptureDevice] else {return} guard let device = devices.filter({$0.position == .back}).first else {return} guard let videoInput = try? AVCaptureDeviceInput(device: device) else {return} self.input = videoInput self.device = device if session.canSetSessionPreset(TGPhotoPickerConfig.shared.sessionPreset) { session.sessionPreset = TGPhotoPickerConfig.shared.sessionPreset } if session.canAddInput(input) { session.addInput(input) }else{ session.addInput(videoInput) } if session.canAddOutput(imageOutput) { session.addOutput(imageOutput) }else{ session.addOutput(imageOutput) } previewLayer.frame = view.bounds self.previewLayer.videoGravity = TGPhotoPickerConfig.shared.videoGravity view.layer.insertSublayer(previewLayer, at: 0) session.startRunning() do { try device.lockForConfiguration() } catch { return } if device.isFlashModeSupported(AVCaptureFlashMode.auto){ device.flashMode = .auto } if device.isWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.autoWhiteBalance){ device.whiteBalanceMode = .autoWhiteBalance } device.unlockForConfiguration() }}extension TGCameraVCForiOS8: UIAlertViewDelegate{ func alertView(_ alertView: UIAlertView, clickedButtonAt buttonIndex: Int) { if buttonIndex == 0 && alertView.tag == TGPhotoPickerConfig.shared.alertViewTag { guard let url = NSURL(string: UIApplicationOpenSettingsURLString) else { return } if UIApplication.shared.canOpenURL(url as URL){ UIApplication.shared.openURL(url as URL) } } }}其实现了对焦、闪光灯等许多特性，效果如下
完整Demo见https://github.com/targetcloud/TGPhotoPicker
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