self is not nil before proceeding in a block of code, which can help …

…prevent runtime errors related to unwrapping a nil optional value.
WeTransfer · Feb 13, 2024 · f546b1d · f546b1d
1 parent bbba45c
commit f546b1d
Showing 1 changed file with 6 additions and 7 deletions.
diff --git a/Sources/WeScan/Scan/CaptureSessionManager.swift b/Sources/WeScan/Scan/CaptureSessionManager.swift
@@ -149,14 +149,13 @@ final class CaptureSessionManager: NSObject, AVCaptureVideoDataOutputSampleBuffe
             }
         case .notDetermined:
             AVCaptureDevice.requestAccess(for: AVMediaType.video, completionHandler: { [weak self] granted in
-                if granted {
-                    DispatchQueue.main.async {
-                        self?.start()
-                    }
-                } else {
-                    DispatchQueue.main.async {
+                DispatchQueue.main.async {
+                    guard let self = self else { return }
+                    if granted {
+                        self.start()
+                    } else {
                         let error = ImageScannerControllerError.authorization
-                        self?.delegate?.captureSessionManager(self!, didFailWithError: error)
+                        self.delegate?.captureSessionManager(self, didFailWithError: error)
                     }
                 }
             })