CODEWITHSUNDEEP
iosswift
e.iluf
e.iluf

Reputation: 1659

How to fix unresolved identifier 'stopRunning' error for AVcapture session

I am building a barcode scanner on iOS using swift. This worked perfectly when I first wrote the code but I recently returned to the programming and dicovered that it's throwing some errors. I have an exit scan button when the user press the button, it should exit the scanning mode

this is the exitScan button

  let exitScanButton: UIButton = {
    let button = UIButton(type: .system)
    button.backgroundColor = UIColor(r: 80, g: 101, b: 161)
    button.setTitle("Exit", for: .normal)
    button.setTitleColor(UIColor.white, for: .normal)
    button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
    button.translatesAutoresizingMaskIntoConstraints = false
    
   button.addTarget( nil, action: #selector(exitScan), for:.touchUpInside)
    return button
}()

this is my exitScan function

   func exitScan() -> Void {
    //Go back to ViewController
    [self.captureSession, stopRunning];
    [self.videoPreviewLayer, removeFromSuperlayer];
    self.videoPreviewLayer = nil;
    self.captureSession = nil;
    self.navigationController?.popToRootViewController(animated: true)
}

Xcode is throwing two errors

Use of unresolved identifier 'stopRunning'

Use of unresolved identifier 'removeFromSuperlayer'

How is this an error and how can I fix this?

Upvotes: 0

Views: 90

Answers (1)

inokey
inokey

Reputation: 6170

It's objective-c syntax.

In Swift:

self.catpureSession.stopRunning()

self.videoPreviewLayer.removeFromSuperLayer()

no semicolons also.

Upvotes: 1

Related Questions