大幅変更＆環境バージョンアップ

plugin/qr_code_scanner/ios/Classes/SwiftFlutterQrPlugin.swift

@@ -0,0 +1,22 @@
+import Flutter
+import UIKit
+
+public class SwiftFlutterQrPlugin: NSObject, FlutterPlugin {
+
+  var factory: QRViewFactory
+  public init(with registrar: FlutterPluginRegistrar) {
+    self.factory = QRViewFactory(withRegistrar: registrar)
+    registrar.register(factory, withId: "net.touchcapture.qr.flutterqr/qrview")
+  }
+    
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    registrar.addApplicationDelegate(SwiftFlutterQrPlugin(with: registrar))
+  }
+  
+  public func applicationDidEnterBackground(_ application: UIApplication) {
+  }
+
+  public func applicationWillTerminate(_ application: UIApplication) {
+  }
+
+}