Script message handler for webview didn't get cleaned up properly (#31)

README.md

@@ -31,6 +31,9 @@ class SeatingChartSample: UIViewController {
         self.view = seatsio
     }
 
+    override func viewDidDisappear(_ animated: Bool) {
+        seatsio.cleanup()
+    }
 }
 ```
 

seatsio-ios/JustBridge.swift

@@ -132,6 +132,9 @@ public class JustBridge: NSObject {
         self.injectBridgeJS()
     }
 
+    public func cleanUp() {
+        self.webview!.configuration.userContentController.removeScriptMessageHandler(forName: "bridge")
+    }
 
     /// Register a handler
     /// Handler will be invoked when js call this handler
@@ -150,7 +153,6 @@ public class JustBridge: NSObject {
         self.handlers.removeValue(forKey: name)
     }
 
-
     /// Call a js handler
     ///
     /// - Parameters:
@@ -229,6 +231,3 @@ extension JustBridge: WKScriptMessageHandler {
     }
 
 }
-
-
-

seatsio-ios/SeatsioWebView.swift

@@ -182,6 +182,9 @@ public class SeatsioWebView: WKWebView {
                """
     }
 
+    public func cleanup() {
+        bridge.cleanUp()
+    }
 }
 
 private func firstArg(_ data: Any?) -> Any {