From 3ff3bb1681f41ffe49a9bdd8a1d7181014af7204 Mon Sep 17 00:00:00 2001
From: k <neederkkh@gubgoo.com>
Date: Wed, 28 Aug 2024 16:02:49 +0900
Subject: [PATCH] 
 https://github.com/pichillilorenzo/flutter_inappwebview/issues/1947 - In iOS
 version 17.2, when moving the input focus in a WebView, an unknown area
 appears at the top of the screen.

---
 .../ios/Classes/InAppWebView/InAppWebView.swift          | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift b/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift
index 25dee18d..889d3a3a 100755
--- a/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift
+++ b/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift
@@ -728,6 +728,15 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate,
             let newContentOffset = change?[.newKey] as? CGPoint
             let oldContentOffset = change?[.oldKey] as? CGPoint
             let startedByUser = scrollView.isDragging || scrollView.isDecelerating
+            // zpdl9089 : https://github.com/pichillilorenzo/flutter_inappwebview/issues/1947
+            if #available(iOS 17.2, *) {
+                if let y = newContentOffset?.y {
+                    if(!startedByUser && scrollView.contentInset.bottom < 0.0 && y <= scrollView.contentInset.bottom) {
+                        scrollView.contentOffset = oldContentOffset ?? .zero
+                        return
+                    }
+                }
+            }
             if newContentOffset != oldContentOffset {
                 DispatchQueue.main.async {
                     self.onScrollChanged(startedByUser: startedByUser, oldContentOffset: oldContentOffset)