通过AVFoundation库的AVCaptureSession等类写的一个自定义相机 因为iOS10，ios11 AVFoundation库一直都有变化。 修改了一些iOS10、iOS11废弃的方法，用的新的方法替代 长代码来袭：
import UIKit
import AVFoundation
class CameraViewController: UIViewController,AVCapturePhotoCaptureDelegate {
//捕获设备，通常是前置摄像头，后置摄像头，麦克风（音频输入）
var device : AVCaptureDevice?
//AVCaptureDeviceInput 代表输入设备，他使用AVCaptureDevice 来初始化
var input : AVCaptureDeviceInput?
//当启动摄像头开始捕获输入
var output : AVCaptureMetadataOutput?
//照片输出流
var imageOutPut : AVCapturePhotoOutput?
//session：由他把输入输出结合在一起，并开始启动捕获设备（摄像头）
var session : AVCaptureSession?
var photoSettings :AVCapturePhotoSettings?
//图像预览层，实时显示捕获的图像
var previewLayer : AVCaptureVideoPreviewLayer?
//拍照按钮
let photoButton = UIButton()
//闪光灯按钮
let flashButton = UIButton()
//聚焦
let focusView = UIView()
//是否开启闪光灯
var isFlashOn = Bool()
//照片
let imageView = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
isFlashOn = false
self.view.backgroundColor = UIColor.clear
if self.checkCameraPermission() {
self.customCamera()
self.initSubViews()
self.focusAtPoint(point: CGPoint(x: 0.5, y: 0.5))
}
}
func customCamera() {
//使用AVMediaTypeVideo 指明self.device代表视频，默认使用后置摄像头进行初始化
device = AVCaptureDevice.default(for:AVMediaType.video)!
//使用设备初始化输入
input = try!AVCaptureDeviceInput(device: device!)
//生成输出对象
output = AVCaptureMetadataOutput()
imageOutPut = AVCapturePhotoOutput()
//生成会话，用来结合输入输出
session = AVCaptureSession()
if (session?.canSetSessionPreset(.hd1920x1080))! {
session?.canSetSessionPreset(.hd1920x1080)
}
if (session?.canAddInput(input!))! {
session?.addInput(input!)
}
if (session?.canAddOutput(imageOutPut!))! {
session?.addOutput(imageOutPut!)
}
//使用self.session，初始化预览层，self.session负责驱动input进行信息的采集，layer负责把图像渲染显示
previewLayer = AVCaptureVideoPreviewLayer(session: session!)
previewLayer?.frame = CGRect(x: 0, y: 0, width: kScreenWidth, height: kScreenHeight)
previewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
self.view.layer.addSublayer(previewLayer!)
//开始启动
session?.startRunning()
photoSettings = AVCapturePhotoSettings.init(format:[AVVideoCodecKey:AVVideoCodecType.jpeg])
if ((try?device?.lockForConfiguration()) != nil) {
if ((imageOutPut?.supportedFlashModes) != nil) {
photoSettings?.flashMode = .auto
}
if (device?.isWhiteBalanceModeSupported(.autoWhiteBalance))! {
device?.whiteBalanceMode = .autoWhiteBalance
}
}
device?.unlockForConfiguration()
}
func initSubViews() {
let btn = UIButton()
btn.frame = CGRect(x: 20, y: 20, width: 40, height: 40)
btn.setTitle("取消", for: .normal)
btn.addTarget(self, action: #selector(disMiss), for:.touchUpInside)
self.view.addSubview(btn)
photoButton.frame = CGRect(x: kScreenWidth/2.0-30, y: kScreenHeight-100, width: 60, height: 60)
photoButton.setImage(UIImage(named: "photograph"), for:.normal)
photoButton.addTarget(self, action: #selector(shutterCamera), for: .touchUpInside)
self.view.addSubview(photoButton)
focusView.frame = CGRect(x: 0, y: 0, width: 80, height: 80)
focusView.layer.borderWidth = 1.0
focusView.layer.borderColor = UIColor.green.cgColor
self.view.addSubview(focusView)
focusView.isHidden = true
let leftButton = UIButton()
leftButton.setTitle("切换", for:.normal)
leftButton.titleLabel?.textAlignment = .center
leftButton.sizeToFit()
leftButton.center = CGPoint(x: (kScreenWidth - 60)/2.0/2.0, y: kScreenHeight-70)
leftButton.addTarget(self, action:#selector(changeCamera), for:.touchUpInside)
self.view.addSubview(leftButton)
flashButton.setTitle("闪光灯关", for: .normal)
flashButton.titleLabel?.textAlignment = .center
flashButton.sizeToFit()
flashButton.center = CGPoint(x: kScreenWidth-(kScreenWidth - 60)/2.0/2.0, y: kScreenHeight-70)
flashButton.addTarget(self, action: #selector(FlashOn), for:.touchUpInside)
self.view.addSubview(flashButton)
self.view.addSubview(imageView)
imageView.frame = CGRect(x:5, y: kScreenHeight-100, width: 60, height: 60)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(focusGesture(gesture:)))
self.view.addGestureRecognizer(tapGesture)
let pinch = UIPinchGestureRecognizer(target: self, action: #selector(handlePinchGesture(recognizer:)))
self.view.addGestureRecognizer(pinch)
}
@objc func handlePinchGesture(recognizer:UIPinchGestureRecognizer){
var allTouchesAreOnThePreviewLayer = Bool()
allTouchesAreOnThePreviewLayer = true
let numTouches = recognizer.numberOfTouches
for i in 0.. maxScaleAndCropFactor! {
effectiveScale = maxScaleAndCropFactor!
}
UIView.animate(withDuration: 0.025) {
self.previewLayer?.affineTransform().scaledBy(x: effectiveScale, y: effectiveScale)
}
}
}
@objc func focusGesture(gesture:UITapGestureRecognizer) {
var point : CGPoint
point = gesture.location(in: gesture.view)
self.focusAtPoint(point: point)
}
func focusAtPoint(point:CGPoint) {
let size = self.view.bounds.size
// focusPoint 函数后面Point取值范围是取景框左上角（0，0）到取景框右下角（1，1）之间,按这个来但位置就是不对，只能按上面的写法才可以。前面是点击位置的y/PreviewL���ayer的高度，后面是1-点击位置的x/PreviewLayer的宽度
let focusPoint = CGPoint(x: point.y/size.height, y: 1 - point.x/size.width)
if ((try?device?.lockForConfiguration()) != nil) {
if (device?.isFocusModeSupported(.autoFocus))! {
device?.focusPointOfInterest = focusPoint
device?.focusMode = .autoFocus
}
if (device?.isExposureModeSupported(.autoExpose))! {
device?.exposurePointOfInterest = focusPoint
device?.exposureMode = .autoExpose
}
}
device?.unlockForConfiguration()
focusView.center = point
focusView.isHidden = false
UIView.animate(withDuration: 0.3, animations: {
self.focusView.transform = CGAffineTransform.init(scaleX: 1.25, y: 1.25)
}) { (finished) in
UIView.animate(withDuration: 0.5, animations: {
self.focusView.transform = CGAffineTransform.identity
}, completion: { (finished) in
self.focusView.isHidden = true
})
}
}
@objc func disMiss() {
self.dismiss(animated: true, completion: nil)
}
@objc func shutterCamera() {
let videoConnection = imageOutPut?.connection(with: .video)
if (videoConnection == nil) {
return
}
photoSettings = AVCapturePhotoSettings.init(format:[AVVideoCodecKey:AVVideoCodecType.jpeg])
photoSettings?.flashMode = .auto
imageOutPut?.capturePhoto(with:photoSettings!, delegate: self)
}
func saveImageWithImage(image:UIImage) {
UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);
imageView.image = image
}
//代理方法
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
if let data = photo.fileDataRepresentation(),
let image = UIImage.init(data: data) {
self.saveImageWithImage(image: image)
}
}
@objc func changeCamera() {
var newCamera :AVCaptureDevice?
newCamera = nil
var newInput:AVCaptureDeviceInput?
//获取当前相机的方向(前还是后)
let position = input?.device.position
//为摄像头的转换加转场动画
let animation = CATransition()
animation.timingFunction = CAMediaTimingFunction.init(name:kCAMediaTimingFunctionEaseInEaseOut)
animation.duration = 0.5
animation.type = "oglFlip"
let type = AVCaptureDevice.DeviceType(rawValue: (device?.deviceType.rawValue)!)
if position == .front {
//获取后置摄像头
newCamera = AVCaptureDevice.default(type, for: .video, position: .back)
animation.subtype = kCATransitionFromLeft
}
else {
//获取前置摄像头
newCamera = AVCaptureDevice.default(type, for: .video, position: .front)
animation.subtype = kCATransitionFromRight
}
previewLayer?.add(animation, forKey: nil)
newInput = try?AVCaptureDeviceInput(device: newCamera!)
if (newInput != nil) {
session?.beginConfiguration()
session?.removeInput(input!)
if (session?.canAddInput(newInput!))! {
session?.addInput(newInput!)
input = newInput
}
else {
//如果不能加现在的input，就加原来的input
session?.addInput(input!)
}
session?.commitConfiguration()
}
}
@objc func FlashOn() {
if ((try?device?.lockForConfiguration()) != nil) {
if isFlashOn {
if ((imageOutPut?.supportedFlashModes) != nil) {
photoSettings?.flashMode = .off
isFlashOn = false
flashButton.setTitle("闪光灯关", for: .normal)
}
}
else {
if ((imageOutPut?.supportedFlashModes) != nil) {
photoSettings?.flashMode = .on
isFlashOn = true
flashButton.setTitle("闪光灯开", for: .normal)
}
}
}
device?.unlockForConfiguration()
}
func checkCameraPermission() -> Bool {
let authStatus = AVCaptureDevice.authorizationStatus(for: .video)
if authStatus == .denied {
print("请打开相机权限")
return false
}
return true
}
}
记得在plist文件添加相机权限。。。
https://github.com/WisdomWang/CustomCaremaDemo