updated CHANGELOG.md, Added iosAnimated optional argument to zoomBy WebView method

CHANGELOG.md

@@ -22,6 +22,7 @@
 - Merge "Fix _channel.invokeMethod name for injectCSSFileFromUrl method" [#645](https://github.com/pichillilorenzo/flutter_inappwebview/pull/645) (thanks to [omralcrt](https://github.com/omralcrt))
 - Merge "Add android media intents on wildcard input accept" [#620](https://github.com/pichillilorenzo/flutter_inappwebview/pull/620) (thanks to [cbodin](https://github.com/cbodin))
 - Merge "Add ChromeSafariBrowser support for Android 11" [#538](https://github.com/pichillilorenzo/flutter_inappwebview/pull/538) (thanks to [DRSchlaubi](https://github.com/DRSchlaubi))
+- Merge "fix(iOS): missing implementation of method zoomBy" [#670](https://github.com/pichillilorenzo/flutter_inappwebview/pull/670) (thanks to [pcqpcq](https://github.com/pcqpcq))
 - Fixed missing properties initialization when using InAppWebViewController.fromInAppBrowser
 - Fixed "Issue in Flutter web: 'Unsupported operation: Platform._operatingSystem'" [#507](https://github.com/pichillilorenzo/flutter_inappwebview/issues/507)
 - Fixed "window.flutter_inappwebview.callHandler is not a function" [#218](https://github.com/pichillilorenzo/flutter_inappwebview/issues/218)
@@ -40,6 +41,7 @@
 - Removed `debuggingEnabled` WebView option; on Android you should use now the `AndroidInAppWebViewController.setWebContentsDebuggingEnabled(bool debuggingEnabled)` static method; on iOS, debugging is always enabled
 - `allowUniversalAccessFromFileURLs` and `allowFileAccessFromFileURLs` WebView options moved from Android-specific options to cross-platform options
 - Added `callAsyncJavaScript` name to the list of javaScriptHandlerForbiddenNames
+- Added `iosAnimated` optional argument to `zoomBy` WebView method
 
 ## 4.0.0+4
 

example/.flutter-plugins-dependencies

-{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"android":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"macos":[{"name":"path_provider_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_macos-0.0.4+8/","dependencies":[]},{"name":"url_launcher_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_macos-0.1.0-nullsafety.2/","dependencies":[]}],"linux":[{"name":"path_provider_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_linux-0.0.1+2/","dependencies":[]},{"name":"url_launcher_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_linux-0.1.0-nullsafety.3/","dependencies":[]}],"windows":[{"name":"path_provider_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+3/","dependencies":[]},{"name":"url_launcher_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_windows-0.1.0-nullsafety.2/","dependencies":[]}],"web":[]},"dependencyGraph":[{"name":"device_info","dependencies":[]},{"name":"flutter_downloader","dependencies":[]},{"name":"flutter_inappwebview","dependencies":["device_info"]},{"name":"integration_test","dependencies":[]},{"name":"path_provider","dependencies":["path_provider_macos","path_provider_linux","path_provider_windows"]},{"name":"path_provider_linux","dependencies":[]},{"name":"path_provider_macos","dependencies":[]},{"name":"path_provider_windows","dependencies":[]},{"name":"permission_handler","dependencies":[]},{"name":"url_launcher","dependencies":["url_launcher_linux","url_launcher_macos","url_launcher_windows"]},{"name":"url_launcher_linux","dependencies":[]},{"name":"url_launcher_macos","dependencies":[]},{"name":"url_launcher_windows","dependencies":[]}],"date_created":"2021-02-07 16:00:15.712688","version":"1.26.0-18.0.pre.90"}
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"android":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"macos":[{"name":"path_provider_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_macos-0.0.4+8/","dependencies":[]},{"name":"url_launcher_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_macos-0.1.0-nullsafety.2/","dependencies":[]}],"linux":[{"name":"path_provider_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_linux-0.0.1+2/","dependencies":[]},{"name":"url_launcher_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_linux-0.1.0-nullsafety.3/","dependencies":[]}],"windows":[{"name":"path_provider_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+3/","dependencies":[]},{"name":"url_launcher_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_windows-0.1.0-nullsafety.2/","dependencies":[]}],"web":[]},"dependencyGraph":[{"name":"device_info","dependencies":[]},{"name":"flutter_downloader","dependencies":[]},{"name":"flutter_inappwebview","dependencies":["device_info"]},{"name":"integration_test","dependencies":[]},{"name":"path_provider","dependencies":["path_provider_macos","path_provider_linux","path_provider_windows"]},{"name":"path_provider_linux","dependencies":[]},{"name":"path_provider_macos","dependencies":[]},{"name":"path_provider_windows","dependencies":[]},{"name":"permission_handler","dependencies":[]},{"name":"url_launcher","dependencies":["url_launcher_linux","url_launcher_macos","url_launcher_windows"]},{"name":"url_launcher_linux","dependencies":[]},{"name":"url_launcher_macos","dependencies":[]},{"name":"url_launcher_windows","dependencies":[]}],"date_created":"2021-02-07 16:14:15.833284","version":"1.26.0-18.0.pre.90"}
\ No newline at end of file

ios/Classes/InAppWebView.swift

@@ -3437,9 +3437,9 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
         return Int64(scrollView.contentSize.height)
     }
     
-    public func zoomBy(zoomFactor: Float) {
+    public func zoomBy(zoomFactor: Float, animated: Bool) {
         let currentZoomScale = scrollView.zoomScale
-        scrollView.setZoomScale(currentZoomScale * CGFloat(zoomFactor), animated: false)
+        scrollView.setZoomScale(currentZoomScale * CGFloat(zoomFactor), animated: animated)
     }
     
     public func getScale() -> Float {

ios/Classes/InAppWebViewMethodHandler.swift

@@ -271,7 +271,8 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 break
             case "zoomBy":
                 let zoomFactor = arguments!["zoomFactor"] as! Float
-                webView?.zoomBy(zoomFactor: zoomFactor)
+                let animated = arguments!["iosAnimated"] as! Bool
+                webView?.zoomBy(zoomFactor: zoomFactor, animated: animated)
                 result(true)
                 break
             case "reloadFromOrigin":

lib/src/in_app_webview_controller.dart

@@ -1716,17 +1716,20 @@ class InAppWebViewController {
   ///
   ///[zoomFactor] represents the zoom factor to apply. On Android, the zoom factor will be clamped to the Webview's zoom limits and, also, this value must be in the range 0.01 (excluded) to 100.0 (included).
   ///
+  ///[iosAnimated] `true` to animate the transition to the new scale, `false` to make the transition immediate. Available only on iOS.
+  ///
   ///**NOTE**: available on Android 21+.
   ///
   ///**Official Android API**: https://developer.android.com/reference/android/webkit/WebView#zoomBy(float)
   ///
   ///**Official iOS API**: https://developer.apple.com/documentation/uikit/uiscrollview/1619412-setzoomscale
-  Future<void> zoomBy(double zoomFactor) async {
+  Future<void> zoomBy({required double zoomFactor, bool iosAnimated = false}) async {
     assert(defaultTargetPlatform != TargetPlatform.android ||
         (defaultTargetPlatform == TargetPlatform.android && zoomFactor > 0.01 && zoomFactor <= 100.0));
 
     Map<String, dynamic> args = <String, dynamic>{};
     args.putIfAbsent('zoomFactor', () => zoomFactor);
+    args.putIfAbsent('iosAnimated', () => iosAnimated);
     return await _channel.invokeMethod('zoomBy', args);
   }