diff --git a/flutter_inappwebview_ios/ios/Classes/InAppBrowser/InAppBrowserWebViewController.swift b/flutter_inappwebview_ios/ios/Classes/InAppBrowser/InAppBrowserWebViewController.swift
index 3f59398b..8cecb3a5 100755
--- a/flutter_inappwebview_ios/ios/Classes/InAppBrowser/InAppBrowserWebViewController.swift
+++ b/flutter_inappwebview_ios/ios/Classes/InAppBrowser/InAppBrowserWebViewController.swift
@@ -145,7 +145,7 @@ public class InAppBrowserWebViewController: UIViewController, InAppBrowserDelega
             }
         }
         
-        if let wId = windowId {
+        if windowId != nil {
             channelDelegate?.onBrowserCreated()
             webView?.runWindowBeforeCreatedCallbacks()
         } else {
diff --git a/flutter_inappwebview_ios/ios/Classes/InAppWebView/FlutterWebViewController.swift b/flutter_inappwebview_ios/ios/Classes/InAppWebView/FlutterWebViewController.swift
index 1772b5bc..2348c078 100755
--- a/flutter_inappwebview_ios/ios/Classes/InAppWebView/FlutterWebViewController.swift
+++ b/flutter_inappwebview_ios/ios/Classes/InAppWebView/FlutterWebViewController.swift
@@ -138,7 +138,7 @@ public class FlutterWebViewController: NSObject, FlutterPlatformView, Disposable
             }
             load(initialUrlRequest: initialUrlRequest, initialFile: initialFile, initialData: initialData)
         }
-        else if let wId = windowId {
+        else if windowId != nil {
             webView.runWindowBeforeCreatedCallbacks()
         }
     }
diff --git a/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebMessage/WebMessageChannelChannelDelegate.swift b/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebMessage/WebMessageChannelChannelDelegate.swift
index c95e9a28..5750a89d 100644
--- a/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebMessage/WebMessageChannelChannelDelegate.swift
+++ b/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebMessage/WebMessageChannelChannelDelegate.swift
@@ -39,7 +39,7 @@ public class WebMessageChannelChannelDelegate : ChannelDelegate {
             if let webView = webMessageChannel?.webView, let ports = webMessageChannel?.ports, ports.count > 0 {
                 let index = arguments!["index"] as! Int
                 let port = ports[index]
-                var message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
+                let message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
                 
                 var ports: [WebMessagePort] = []
                 if let notConnectedPorts = message.ports {
diff --git a/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebViewChannelDelegate.swift b/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebViewChannelDelegate.swift
index 880810f5..dc0046fa 100644
--- a/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebViewChannelDelegate.swift
+++ b/flutter_inappwebview_ios/ios/Classes/InAppWebView/WebViewChannelDelegate.swift
@@ -509,7 +509,7 @@ public class WebViewChannelDelegate : ChannelDelegate {
             break
         case .postWebMessage:
             if let webView = webView {
-                var message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
+                let message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
                 let targetOrigin = arguments!["targetOrigin"] as! String
                 
                 var ports: [WebMessagePort] = []
diff --git a/flutter_inappwebview_ios/ios/Classes/PrintJob/PrintJobSettings.swift b/flutter_inappwebview_ios/ios/Classes/PrintJob/PrintJobSettings.swift
index 0049c421..ab520c3c 100644
--- a/flutter_inappwebview_ios/ios/Classes/PrintJob/PrintJobSettings.swift
+++ b/flutter_inappwebview_ios/ios/Classes/PrintJob/PrintJobSettings.swift
@@ -148,7 +148,7 @@ public class PrintJobSettings: ISettings<PrintJobController> {
     }
     
     override func getRealSettings(obj: PrintJobController?) -> [String: Any?] {
-        var realOptions: [String: Any?] = toMap()
+        let realOptions: [String: Any?] = toMap()
         return realOptions
     }
 }