Flutter TextField在iOS端引发WebProcess崩溃及卡顿问题求助

在iOS端开发Flutter应用时，点击TextField并输入拉丁字母后，控制台输出以下崩溃日志：

[Process] 0x112000940 - [PID=73674] WebProcessProxy::didClose: (web process 73674 crash)
[Process] 0x112000940 - [PID=73674] WebProcessProxy::processDidTerminateOrFailedToLaunch: reason=4
[Process] 0x13b897018 - [pageProxyID=6, webPageID=7, PID=73674] WebPageProxy::processDidTerminate: (pid 73674), reason 4
[assertion] Error acquiring assertion: <Error Domain=RBSServiceErrorDomain Code=1 "target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit" UserInfo={NSLocalizedFailureReason=target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit}>
[ProcessSuspension] 0x111004e40 - ProcessAssertion::acquireSync Failed to acquire RBS assertion 'ConnectionTerminationWatchdog' for process with PID=73674, error: Error Domain=RBSServiceErrorDomain Code=1 "target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit" UserInfo={NSLocalizedFailureReason=target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit}
[Loading] 0x13b897018 - [pageProxyID=6, webPageID=7, PID=73674] WebPageProxy::dispatchProcessDidTerminate: reason=Crash
[ServicesDaemonManager] interruptionHandler is called. -[FontServicesDaemonManager connection]_block_invoke
[XPC] Handle connection with error: Connection interrupted
Could not signal service com.apple.WebKit.WebContent: 113: Could not find specified service
[Process] 0x112001930 - [PID=74275] WebProcessProxy::didBecomeUnresponsive:
[Process] 0x13a780018 - [pageProxyID=360, webPageID=361, PID=74275] WebPageProxy::processDidBecomeUnresponsive:
[assertion] Error acquiring assertion: <Error Domain=RBSServiceErrorDomain Code=1 "target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit" UserInfo={NSLocalizedFailureReason=target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit}>
[ProcessSuspension] 0x111006580 - ProcessAssertion::acquireSync Failed to acquire RBS assertion 'WebProcess Suspended Assertion' for process with PID=73685, error: Error Domain=RBSServiceErrorDomain Code=1 "target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit" UserInfo={NSLocalizedFailureReason=target is not running or doesn't have entitlement com.apple.runningboard.assertions.webkit}

随后应用出现卡顿，偶尔会崩溃。当前应用堆内存仅约20MB，理论上不会触发此类问题。新建空白Flutter项目复现相同代码未出现异常，且项目未集成WebView组件。

相关代码如下：

import 'package:flutter/material.dart';

class SearchScreen extends StatelessWidget {
  const SearchScreen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.amber,
      appBar: AppBar(
        title: TextFormField(),
      ),
    );
  }
}

可能的原因及排查方向 #

• 第三方依赖冲突：检查pubspec.yaml中的依赖包，尤其是涉及文本输入、输入法适配或iOS原生能力扩展的库，部分包可能间接引入WebKit相关逻辑或修改了系统权限配置。
• iOS原生配置异常：核查项目的Info.plist和Entitlements文件，确认是否存在与WebKit、字体服务相关的权限配置错误，导致系统启动WebProcess时权限不足。
• Flutter版本兼容问题：当前使用的Flutter版本可能存在TextField与特定iOS版本的适配bug，尝试切换至最新稳定版或已知兼容的旧版本测试。
• 构建缓存损坏：执行flutter clean清理项目缓存，删除iOS目录下的Pods文件夹和Build文件夹后重新构建项目。
• 输入法兼容性：切换至iOS系统默认输入法测试，排除第三方输入法与Flutter TextField的交互冲突。

内容的提问来源于stack exchange，提问作者JBTG