ios fixes

Author: jacobg

src/ios/QRScanner.swift

@@ -3,10 +3,10 @@ import AVFoundation
 
 @objc(QRScanner)
 class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
-    
+
     class CameraView: UIView {
         var videoPreviewLayer:AVCaptureVideoPreviewLayer?
-        
+
         func interfaceOrientationToVideoOrientation(_ orientation : UIInterfaceOrientation) -> AVCaptureVideoOrientation {
             switch (orientation) {
             case UIInterfaceOrientation.portrait:
@@ -29,18 +29,18 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
                     layer.frame = self.bounds;
                 }
             }
-            
+
             self.videoPreviewLayer?.connection?.videoOrientation = interfaceOrientationToVideoOrientation(UIApplication.shared.statusBarOrientation);
         }
-        
-        
+
+
         func addPreviewLayer(_ previewLayer:AVCaptureVideoPreviewLayer?) {
             previewLayer!.videoGravity = AVLayerVideoGravity.resizeAspectFill
             previewLayer!.frame = self.bounds
             self.layer.addSublayer(previewLayer!)
             self.videoPreviewLayer = previewLayer;
         }
-        
+
         func removePreviewLayer() {
             if self.videoPreviewLayer != nil {
                 self.videoPreviewLayer!.removeFromSuperlayer()
@@ -98,24 +98,14 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
 
     // utility method
     @objc func backgroundThread(delay: Double = 0.0, background: (() -> Void)? = nil, completion: (() -> Void)? = nil) {
-        if #available(iOS 8.0, *) {
-            DispatchQueue.global(qos: DispatchQoS.QoSClass.userInitiated).async {
-                if (background != nil) {
-                    background!()
-                }
-                DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + delay * Double(NSEC_PER_SEC)) {
-                    if(completion != nil){
-                        completion!()
-                    }
-                }
-            }
-        } else {
-            // Fallback for iOS < 8.0
-            if(background != nil){
+        DispatchQueue.global(qos: DispatchQoS.QoSClass.userInitiated).async {
+            if (background != nil) {
                 background!()
             }
-            if(completion != nil){
-                completion!()
+            DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + delay * Double(NSEC_PER_SEC)) {
+                if(completion != nil){
+                    completion!()
+                }
             }
         }
     }
@@ -133,15 +123,8 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
             if (captureSession?.isRunning != true){
                 cameraView.backgroundColor = UIColor.clear
                 self.webView!.superview!.insertSubview(cameraView, belowSubview: self.webView!)
-                let availableVideoDevices =  AVCaptureDevice.devices(for: AVMediaType.video)
-                for device in availableVideoDevices {
-                    if device.position == AVCaptureDevice.Position.back {
-                        backCamera = device
-                    }
-                    else if device.position == AVCaptureDevice.Position.front {
-                        frontCamera = device
-                    }
-                }
+                backCamera = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back)
+                frontCamera = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front)
                 // older iPods have no back camera
                 if(backCamera == nil){
                     currentCamera = 1
@@ -467,8 +450,7 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
     }
 
     @objc func openSettings(_ command: CDVInvokedUrlCommand) {
-        if #available(iOS 10.0, *) {
-            guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
+        guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
             return
         }
         if UIApplication.shared.canOpenURL(settingsUrl) {
@@ -477,15 +459,6 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
             })
         } else {
             self.sendErrorCode(command: command, error: QRScannerError.open_settings_unavailable)
-            }
-        } else {
-            // pre iOS 10.0
-            if #available(iOS 8.0, *) {
-                UIApplication.shared.openURL(NSURL(string: UIApplicationOpenSettingsURLString)! as URL)
-                self.getStatus(command)
-            } else {
-                self.sendErrorCode(command: command, error: QRScannerError.open_settings_unavailable)
-            }
         }
     }
 }