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run camera permission completion handler code on UI thread

cyberta 3 years ago
parent
commit
377eb88caf
1 changed files with 7 additions and 5 deletions
  1. 7 5
      deltachat-ios/Controller/QrCodeReaderController.swift

+ 7 - 5
deltachat-ios/Controller/QrCodeReaderController.swift

@@ -46,11 +46,13 @@ class QrCodeReaderController: UIViewController {
         } else {
             AVCaptureDevice.requestAccess(for: .video, completionHandler: {  [weak self] (granted: Bool) in
                 guard let self = self else { return }
-                if granted {
-                    self.setupQRCodeScanner()
-                } else {
-                    self.showCameraWarning()
-                    self.showPermissionAlert()
+                DispatchQueue.main.async {
+                    if granted {
+                        self.setupQRCodeScanner()
+                    } else {
+                        self.showCameraWarning()
+                        self.showPermissionAlert()
+                    }
                 }
             })
         }