ios objective C screenshot sublayer not visible - ios

Question

I'm building an app where i want to take a snapshot from the camera and show it in a UIImageView. I'm able to take the snapshot but the AVCaptureVideoPreviewLayer is not visible in the screenshot. Does anyone know how to do that?
Here is my code:
#implementation ViewController
CGRect imgRect;
AVCaptureVideoPreviewLayer *previewLayer;
AVCaptureVideoDataOutput *output;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//Capture Session
AVCaptureSession *session = [[AVCaptureSession alloc]init];
session.sessionPreset = AVCaptureSessionPresetPhoto;
//Add device
AVCaptureDevice *device =
[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
//Input
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
if (!input)
{
NSLog(#"No Input");
}
[session addInput:input];
//Output
output = [[AVCaptureVideoDataOutput alloc] init];
[session addOutput:output];
output.videoSettings = #{ (NSString *)kCVPixelBufferPixelFormatTypeKey : #(kCVPixelFormatType_32BGRA) };
//Preview
previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
CGFloat x = self.view.bounds.size.width * 0.5 - 128;
imgRect = CGRectMake(x, 64, 256, 256);
previewLayer.frame = imgRect;
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[self.view.layer addSublayer:previewLayer];
//Start capture session
[session startRunning];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)TakeSnapshot:(id)sender {
self.imgResult.image = self.pb_takeSnapshot;
}
- (UIImage *)pb_takeSnapshot {
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, [UIScreen mainScreen].scale);
[self.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:YES];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
#end
a bit of help is very much appreciated.
Thank you in advance
Gilbert Avezaat

Answer 1

You should use AVCaptureStillImageOutput to get image from the camera connection,
Here is how you could do it,
AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
stillImageOutput.outputSettings = #{
AVVideoCodecKey: AVVideoCodecJPEG,
(__bridge id)kCVPixelBufferPixelFormatTypeKey: #(kCVPixelFormatType_32BGRA)
};
[stillImageOutput captureStillImageAsynchronouslyFromConnection:connection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
UIImage *image = [UIImage imageWithData:imageData];
}];

Answer 2

first check for Image is return or not . if return then ...
- (IBAction)TakeSnapshot:(id)sender {
self.imgResult.image = self.pb_takeSnapshot;
[self.view bringSubviewToFrunt:self.imgResult];
}
hope it help you .