-(void)sessionConfiguration{  //初始化一個會話  session = [[AVCaptureSession alloc] init];  [session setSessionPreset:AVCaptureSessionPresetMedium];  //創(chuàng)建視頻設(shè)備  AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];  //根據(jù)設(shè)備創(chuàng)建輸入信號  deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:nil];  //添加 輸出設(shè)備 movieFile  self.deviceMovieFileOutput = [[AVCaptureMovieFileOutput alloc] init];  [session beginConfiguration];  //session添加設(shè)備輸入信號  if ([session canAddInput:deviceInput]) {    [session addInput:deviceInput];  }  //session添加設(shè)備輸出信號  if ([session canAddOutput:self.deviceMovieFileOutput]) {    [session addOutput:self.deviceMovieFileOutput];  }  [session commitConfiguration];}

-(void)embedLayerWithView:(UIView *)view{  if (session == nil) {    return;  }  videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session];  //設(shè)置圖層的大小  videoPreviewLayer.frame = view.bounds;  videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;  [view.layer addSublayer:videoPreviewLayer];  [session startRunning];}

-(void)takePhoto:(NSURL *)fileURL{  [self.deviceMovieFileOutput startRecordingToOutputFileURL:fileURL recordingDelegate:self];}

-(UIImageView *)finishRecord:(UIView *)view isAnewRecording:(BOOL)anewRecording{  gifImageView = [[UIImageView alloc] initWithFrame:view.bounds];  [view addSubview:gifImageView];  isAnewRecording = anewRecording; //存儲是否重新錄制  //停止錄制(停止錄制后做代理方法)  [self.deviceMovieFileOutput stopRecording];  return gifImageView;}

+(NSString *)getVideoSaveFilePath{  NSString*documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];  NSString *filePath = [documentPath stringByAppendingPathComponent:@"video.mp4"];  return filePath;}

-(void)startCamera{  [session startRunning];}-(void)stopCamera{  [session stopRunning];}

- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{  NSLog(@"完成錄制");  NSLog(@"outputFileURL = %@",outputFileURL);  //**重新錄制**//  if (isAnewRecording) {    //**刪除視頻文件**//    NSFileManager *manager = [NSFileManager defaultManager];    [manager removeItemAtPath:outputFileURL.absoluteString error:nil];  }  //**不取消錄制**//  else{    //**獲取視頻時長**//    AVURLAsset *avUrl = [AVURLAsset URLAssetWithURL:outputFileURL options:nil];    CMTime time = [avUrl duration];    int seconds = ceil(time.value/time.timescale);    NSLog(@"seconds = %d",seconds);    if ([self.delegate respondsToSelector:@selector(videoDuration:)]) {      [self.delegate videoDuration:seconds];    }    if ([self.delegate respondsToSelector:@selector(playerVideo:)]) {      [self.delegate playerVideo:outputFileURL.absoluteString];    }  }}