fix(ios): prevents iOS plugin from crashing when destroy is called wi…

…thout a callback Closes #142
bitpay · May 17, 2018 · 610a004 · 610a004
1 parent c9531b8
commit 610a004
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/ios/QRScanner.swift b/src/ios/QRScanner.swift
@@ -42,8 +42,10 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
  }
 
  func removePreviewLayer() {
- self.videoPreviewLayer!.removeFromSuperlayer()
- self.videoPreviewLayer = nil
+ if self.videoPreviewLayer != nil {
+ self.videoPreviewLayer!.removeFromSuperlayer()
+ self.videoPreviewLayer = nil
+ }
  }
  }