iOS 10 - Objective-C : How to implement AVCapturePhotoOutput() to capture image and videos?

Question

I'm trying to implement capture image and videos from my app, and now from iOS 10 onward "AVCaptureStillImageOutput" is deprecated.

Please help me to implement AVCapturePhotoOutput in Objective-C.

Here is my sample code:

_avCaptureOutput = [[AVCapturePhotoOutput alloc]init];
_avSettings = [AVCapturePhotoSettings photoSettings];


AVCaptureSession* captureSession = [[AVCaptureSession alloc] init];
[captureSession startRunning];



AVCaptureConnection *connection = [self.movieOutput connectionWithMediaType:AVMediaTypeVideo];

if (connection.active)
{
    //connection is active
    NSLog(@"Connection is active");

    id previewPixelType = _avSettings.availablePreviewPhotoPixelFormatTypes.firstObject;
    NSDictionary *format = @{(NSString*)kCVPixelBufferPixelFormatTypeKey:previewPixelType,(NSString*)kCVPixelBufferWidthKey:@160,(NSString*)kCVPixelBufferHeightKey:@160};

    _avSettings.previewPhotoFormat = format;

    [_avCaptureOutput capturePhotoWithSettings:_avSettings delegate:self];


}
else
{
    NSLog(@"Connection is not active");
    //connection is not active
    //try to change self.captureSession.sessionPreset,
    //or change videoDevice.activeFormat
}

Answer 1

_avCaptureOutput = [[AVCapturePhotoOutput alloc]init];
_avSettings = [AVCapturePhotoSettings photoSettings];

AVCaptureSession* captureSession = [[AVCaptureSession alloc] init];
[captureSession startRunning];

[self.avCaptureOutput capturePhotoWithSettings:self.avSettings delegate:self];

self must implement the AVCapturePhotoCaptureDelegate

#pragma mark - AVCapturePhotoCaptureDelegate
-(void)captureOutput:(AVCapturePhotoOutput *)captureOutput didFinishProcessingPhotoSampleBuffer:(CMSampleBufferRef)photoSampleBuffer previewPhotoSampleBuffer:(CMSampleBufferRef)previewPhotoSampleBuffer resolvedSettings:(AVCaptureResolvedPhotoSettings *)resolvedSettings bracketSettings:(AVCaptureBracketedStillImageSettings *)bracketSettings error:(NSError *)error
{
    if (error) {
        NSLog(@"error : %@", error.localizedDescription);
    }

    if (photoSampleBuffer) {
        NSData *data = [AVCapturePhotoOutput JPEGPhotoDataRepresentationForJPEGSampleBuffer:photoSampleBuffer previewPhotoSampleBuffer:previewPhotoSampleBuffer];
        UIImage *image = [UIImage imageWithData:data];
    }
}

Now, you get the image, and do whatever you want.

---

Note: Since iOS 11, -captureOutput:didFinishProcessingPhotoSampleBuffer:... is deprecated, need to use -captureOutput:didFinishProcessingPhoto:error: instead:

- (void)captureOutput:(AVCapturePhotoOutput *)output didFinishProcessingPhoto:(AVCapturePhoto *)photo error:(nullable NSError *)error
{  
  NSData *imageData = [photo fileDataRepresentation];
  UIImage *image = [UIImage imageWithData:data];
  ...
}