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iOS

jean-marie castellucci
jean-marie castellucci
4,954 Points
Posted by jean-marie castellucci
jean-marie castellucci
4,954 Points

Swift : take photo from AVFondation

Hi

I want to translate this func from obj c to swift :

  - (void) capImage { //method to capture image from AVCaptureSession      video feed
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;
}
}

NSLog(@"about to request a capture from: %@", stillImageOutput);
[stillImageOutput     captureStillImageAsynchronouslyFromConnection:videoConnection     completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error) {

      if (imageSampleBuffer != NULL) {
    NSData *imageData = [AVCaptureStillImageOutput    jpegStillImageNSDataRepresentation:imageSampleBuffer];
    [self processImage:[UIImage imageWithData:imageData]];
}

}]; }

What i did but not working :

   func takePhoto(sender:UIButton){

var videoConnection:AVCaptureConnection
var connection:AVCaptureConnection
var port : AVCaptureInputPort

for connection in stillImageOutput?.connections {

    for (port in connection.inputPorts as AVCaptureInputPort) {


        if port = AVMediaTypeVideo {
            videoConnection = connection
            break
        }

    }

        if videoConnection {
            break
       }


}
stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {(imageSampleBuffer, error) in
    if (imageSampleBuffer != nil) {
        var imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageSampleBuffer as CMSampleBuffer)
        var image: UIImage = UIImage(data: imageData)


    }
})


}

Could someone help me ?

2 Answers

jean-marie castellucci
jean-marie castellucci
4,954 Points
jean-marie castellucci
jean-marie castellucci
4,954 Points

Thanks but it doesn't worked.

Finaly i found the solution :

  func takePhoto(){




if let stillOutput = self.stillImageOutput {
    // we do this on another thread so that we don't hang the UI
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
        //find the video connection
        var videoConnection : AVCaptureConnection?
        for connecton in stillOutput.connections {
            //find a matching input port
            for port in connecton.inputPorts!{
                if port.mediaType == AVMediaTypeVideo {
                    videoConnection = connecton as? AVCaptureConnection
                    break //for port
                }
            }

            if videoConnection  != nil {
                break// for connections
            }
        }
        if videoConnection  != nil {
            stillOutput.captureStillImageAsynchronouslyFromConnection(videoConnection){
                (imageSampleBuffer : CMSampleBuffer!, _) in

                let imageDataJpeg = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageSampleBuffer)
                var pickedImage: UIImage = UIImage(data: imageDataJpeg)

                let scaledImage:UIImage = self.squareImageFromImage(pickedImage, newSize: 320.0)
                //let scaledImage = self.imageWithImage(pickedImage, scaledToSize: CGSizeMake(320, 320))

                let imageData = UIImagePNGRepresentation(scaledImage)
                var imageFile:PFFile = PFFile(data: imageData)

                var userPost = PFObject(className:"UserPost")

                userPost["imageFile"] = imageFile
                userPost["from"] = PFUser.currentUser()
                userPost.saveInBackground()


            }
            self.captureSession.stopRunning()
        }
    }
}
println("take photo pressed")
}
Naftali Beder
Naftali Beder
927 Points
Naftali Beder
Naftali Beder
927 Points

I get an error when I use this code that says:

"Camera" does not have a member named "stillImageOutput".

It seems like I need to define that somewhere else. Any explanation would be very helpful. Thank you!

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

one thing i see is this 

if port = AVMediaTypeVideo {
            videoConnection = connection
            break
        }

you probably need to compare using ==

if port == AVMediaTypeVideo {
            videoConnection = connection
            break
        }