在ios中手势冲突

### Is there an existing issue for this? - [x] I have searched the existing issues ### Current Behavior 我在AI中搜索过该问题，说是历史遗留的痛点。在使用flutter_inappwebview过程中，android表现出色。在ios中手势冲突得不到解决。尤其是在使用Cesiumjs时，完全无法使用。经过测试得出，当手指触碰到flutter ui时，webview同时得触发了touchstart事件。但手指离开屏幕时，webview没有监听到touchend。我尝试使用了PointerInterceptor，性能太弱了，手势延迟卡顿，尤其是全结合Slider使用时，webview直接崩溃了。 ### Expected Behavior 当手势在flutter层级时，webview不要得到任何touch事件。 ### Steps with code example to reproduce <details> <summary>Steps with code example to reproduce</summary> ```dart return Stack( alignment: Alignment.center, children: [ InAppWebView(...), Positioned( top: (MediaQuery.of(context).size.height - 260) / 2, right: 10, child: Slider( activeColor: Colors.white, max: 1, min: 0, value: _mapController.pitch.value, onChanged: _mapController.changePitch, ), ) ], ); ``` </details> ### Stacktrace/Logs <details> <summary>Stacktrace/Logs</summary> ``` <Replace this line by pasting your stacktrace or logs here> ``` </details> ### Flutter version v 3.38.7 ### Operating System, Device-specific and/or Tool Android 34+ ### Plugin version 6.1.5 ### Additional information _No response_ ### Self grab - [ ] I'm ready to work on this issue!