下面我的快捷代码使用avfoundation拍摄照片并将其放置在imageview上,一堂课。我想将此代码用作基础,并且当用户调用func startVideo进行录制时,然后当用户调用saveVideo func时,它将停止录制并将其保存到imageivew中。
import UIKit
import AVFoundation
class ViewController: UIViewController {
var captureSession = AVCaptureSession()
var backCamera: AVCaptureDevice?
var frontCamera: AVCaptureDevice?
var currentCamera: AVCaptureDevice?
var photoOutput: AVCapturePhotoOutput?
var cameraPreviewLayer: AVCaptureVideoPreviewLayer?
var image: UIImage?
override func viewDidLoad() {
super.viewDidLoad()
setupCaptureSession()
setupDevice()
setupInputOutput()
setupPreviewLayer()
startRunningCaptureSession()
// Do any additional setup after loading the view, typically from a nib.
}
func setupCaptureSession () {
captureSession.sessionPreset = AVCaptureSession.Preset.photo
}
func setupDevice() {
let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [AVCaptureDevice.DeviceType.builtInWideAngleCamera], mediaType: AVMediaType.video, position: AVCaptureDevice.Position.unspecified)
let devices = deviceDiscoverySession.devices
for device in devices {
if device.position == AVCaptureDevice.Position.back {
backCamera = device
} else if device.position == AVCaptureDevice.Position.front {
frontCamera = device
}
}
currentCamera = backCamera
}
func setupInputOutput() {
do {
let captureDeviceInput = try AVCaptureDeviceInput(device: currentCamera!)
captureSession.addInput(captureDeviceInput)
photoOutput = AVCapturePhotoOutput()
photoOutput?.setPreparedPhotoSettingsArray([AVCapturePhotoSettings(format: [AVVideoCodecKey: AVVideoCodecType.jpeg])], completionHandler: nil)
captureSession.addOutput(photoOutput!)
} catch {
print(error)
}
}
func setupPreviewLayer () {
cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
cameraPreviewLayer?.frame = self.view.frame
self.view.layer.insertSublayer(cameraPreviewLayer!, at: 0)
}
func startRunningCaptureSession () {
captureSession.startRunning()
}
@IBAction func startVideo(_ sender: Any) {
}
@IBOutlet weak var photo: UIImageView!
@IBAction func saveVideo(_ sender: Any) {
}}
extension ViewController: AVCapturePhotoCaptureDelegate {
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
//contains the photo variable
if let imageData = photo.fileDataRepresentation() {
print(imageData)
image = UIImage(data: imageData)
}
}}
您可以通过创建AVCaptureMovieFileOutput
并将其添加到捕获会话,并使ViewController
符合AVCaptureFileOutputRecordingDelegate
的方式,将录制的视频保存到文件中。
此示例将5秒钟的视频记录到应用程序的Documents目录中名为“ output.mov”的文件中。
class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {
var captureSession = AVCaptureSession()
var sessionOutput = AVCaptureStillImageOutput()
var movieOutput = AVCaptureMovieFileOutput()
var previewLayer = AVCaptureVideoPreviewLayer()
@IBOutlet var cameraView: UIView!
override func viewWillAppear(animated: Bool) {
self.cameraView = self.view
let devices = AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo)
for device in devices {
if device.position == AVCaptureDevicePosition.Front{
do{
let input = try AVCaptureDeviceInput(device: device as! AVCaptureDevice)
if captureSession.canAddInput(input){
captureSession.addInput(input)
sessionOutput.outputSettings = [AVVideoCodecKey : AVVideoCodecJPEG]
if captureSession.canAddOutput(sessionOutput){
captureSession.addOutput(sessionOutput)
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.Portrait
cameraView.layer.addSublayer(previewLayer)
previewLayer.position = CGPoint(x: self.cameraView.frame.width / 2, y: self.cameraView.frame.height / 2)
previewLayer.bounds = cameraView.frame
}
captureSession.addOutput(movieOutput)
captureSession.startRunning()
let paths = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
let fileUrl = paths[0].URLByAppendingPathComponent("output.mov")
try? NSFileManager.defaultManager().removeItemAtURL(fileUrl)
movieOutput.startRecordingToOutputFileURL(fileUrl, recordingDelegate: self)
let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(5 * Double(NSEC_PER_SEC)))
dispatch_after(delayTime, dispatch_get_main_queue()) {
print("stopping")
self.movieOutput.stopRecording()
}
}
}
catch{
print("Error")
}
}
}
}
func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) {
print("FINISHED \(error)")
// save video to camera roll
if error == nil {
UISaveVideoAtPathToSavedPhotosAlbum(outputFileURL.path!, nil, nil, nil)
}
}
}