利用AVFoundation实现Blink拍照和录像的功能详解手机开发

(void)openCamera:(AVCaptureDevicePosition)cameraPostion {

  BOOL hasCamera = ([[AVCaptureDevice devices] count]

  if (hasCamera) {

  AVCaptureSession *session = [[AVCaptureSession alloc] init];

  session.sessionPreset = AVCaptureSessionPresetHigh;

 

  AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];

  [captureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

  [captureVideoPreviewLayer setFrame:self.cameraImageView.bounds];

  [self.cameraImageView.layer addSublayer:captureVideoPreviewLayer];

 

  AVCaptureDevice *device = [self getCamera:cameraPostion];

  NSError *error = nil;

 

  AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error: error];

  [session addInput:input];

 

  stillImageOutput = [[AVCaptureStillImageOutput alloc] init];

  NSDictionary *outputSettings = @{ AVVideoCodecKey : AVVideoCodecJPEG};

  [stillImageOutput setOutputSettings:outputSettings];

  [session addOutput:stillImageOutput];

 

  movieOutput = [[AVCaptureMovieFileOutput alloc] init];

  [session addOutput:movieOutput];

 

  [session startRunning];

  }
(AVCaptureDevice *)getCamera:(AVCaptureDevicePosition)cameraPostion {

  NSArray *cameras = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];

  for (AVCaptureDevice *device in cameras) {

  if (device.position == cameraPostion)

  return device;

  }

  return [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

  AVCaptureConnection *videoConnection = nil;

  for (AVCaptureConnection *connection in stillImageOutput.connections) {

  for (AVCaptureInputPort *port in [connection inputPorts]) {

  if ([[port mediaType] isEqual:AVMediaTypeVideo] ) {

  videoConnection = connection;

  break;

  }

  }

  if (videoConnection) { break; }

  }

  // 取静态图片

  [stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection

  completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error) {

  NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];

  NSData *compressedData = [imageData gzippedDataWithCompressionLevel:1.0];

  NSData *outputData = [compressedData gunzippedData];

  UIImage *imageT = [[UIImage alloc] initWithData:outputData];

  _testImageView.image = imageT;

  _testImageView.hidden = NO;

  NSFileManager *fileManager = [NSFileManager defaultManager];

  NSString *filePath = [[NSString alloc] initWithFormat:@ %@%@ , NSTemporaryDirectory(),@ main.png ];

  [fileManager createFileAtPath:filePath contents:imageData attributes:nil];

 

  NSString *zipFile = [[NSString alloc] initWithFormat:@ %@%@ , NSTemporaryDirectory(),@ main.zip ];

  ZipArchive *za = [[ZipArchive alloc] init];

  [za CreateZipFile2:zipFile];

  [za addFileToZip:filePath newname:@ main.png ];

  }];
(IBAction)beginRecord:(id)sender {

  [movieOutput startRecordingToOutputFileURL:[self fileURLWithName:@ main.mp4 ] recordingDelegate:self];
(void)captureOutput:(AVCaptureFileOutput *)captureOutput

  didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL

  fromConnections:(NSArray *)connections

  error:(NSError *)error {

  BOOL recordedSuccessfully = YES;

  if (error == nil) {

  [self playVideo:outputFileURL];

  }

  if ([error code] != noErr) {

  id value = [[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey];

  if (value) {

  recordedSuccessfully = [value boolValue];

 

  }

  }
(void)playVideo:(NSURL *)url {

  AVPlayer *player = [AVPlayer playerWithURL:url];

  playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];

 

  playerLayer.frame = CGRectMake(, , 160, 284);

  playerLayer.position = self.view.center;

  [self.view.layer addSublayer:playerLayer];

 

  playerLayer.masksToBounds = YES;

  playerLayer.cornerRadius = 20;

  playerLayer.borderWidth = 1;

  playerLayer.borderColor = [UIColor grayColor].CGColor;

 

  [player play];

  [[NSNotificationCenter defaultCenter]

  addObserver:self

  selector:@selector(removePlayer)

  name:AVPlayerItemDidPlayToEndTimeNotification

  object:nil];