根据demo例子，通过present方式打开Flutter page，第二次进入的时候崩溃

[yangpansky]

在我新建的demo工程中运行官方例子，当第二次进入Present Flutter Page时，程序crash
feature/flutter_1.9_upgrade xcode11.1 iOS13.1

[OHeroJ]

+1

[kelvinluo1112]

+1

[czzj0212]

+10086

[xujim]

@yangpansky 麻烦将你的demo工程发上来

[Dolphii]

@yangpansky 请问解决了吗？

[Dolphii]

@xujim demo也有问题。 github下载工程AS，打开example文件夹在.yaml文件，点击Packages get之后运行在iOS13.1的模拟器上，来回点击Flutter Push Page两次就闪退，打印[XDEBUG]---surface changed--reset-
Lost connection to device.
版本：
flutter_boost:
git:
url: 'https://github.com/alibaba/flutter_boost.git'
ref: '0.1.61'

[nahajub]

+1
Flutter 1.9.1+hotfix.6
flutter_boost 0.1.61
demo奔溃

[Dolphii]

+1
Flutter 1.9.1+hotfix.6
flutter_boost 0.1.61
demo奔溃
官方demo其实有时候也会crash 用真机 应该是engine对模拟器有点问题

[xujim]

@xujim demo也有问题。 github下载工程AS，打开example文件夹在.yaml文件，点击Packages get之后运行在iOS13.1的模拟器上，来回点击Flutter Push Page两次就闪退，打印[XDEBUG]---surface changed--reset-
Lost connection to device.
版本：
flutter_boost:
git:
url: 'https://github.com/alibaba/flutter_boost.git'
ref: '0.1.61'

在我这边无法复现

[xujim]

诸位，如果奔溃，请提供堆栈日志

[xujim]

有时候你的flutter环境有问题会导致崩溃

[SeasonSheng]

开发环境：
[✓] Flutter (Channel beta, v1.9.1+hotfix.2, on Mac OS X 10.14.6 18G87, locale zh-Hans-CN)
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
[!] Android Studio (not installed)
[✓] VS Code (version 1.41.1)
[✓] Connected device (2 available)

使用master分支的Demo，模拟器第二次进入Present Flutter Page，可复现Crash。

控制台输出：
2019-12-20 17:35:52.574076+0800 Runner[51486:2631916] [XDEBUG]---surface changed--reset-

堆栈：
Thread 1 Queue : com.apple.main-thread (serial)
#0 0x000000010443164b in objc_msgSend ()
#1 0x0000000101deb7ba in flutter::AccessibilityBridge::~AccessibilityBridge() ()
#2 0x0000000101df2a25 in std::__1::unique_ptr<flutter::AccessibilityBridge, std::__1::default_deleteflutter::AccessibilityBridge >::reset(flutter::AccessibilityBridge*) ()
#3 0x0000000101df2822 in flutter::PlatformViewIOS::SetOwnerViewController(fml::WeakPtr) ()
#4 0x0000000101dd3add in -[FlutterEngine setViewController:] ()
#5 0x0000000101de41d6 in -[FlutterViewController initWithEngine:nibName:bundle:] ()
#6 0x0000000101a23c7a in -[FLBFlutterViewContainer init] at /Users/shengxichen/Desktop/Git/flutter_boost/ios/Classes/container/FLBFlutterViewContainer.m:51
#7 0x0000000101a1b679 in -[PlatformRouterImp present:urlParams:exts:completion:] at /Users/shengxichen/Desktop/Git/flutter_boost/example/ios/Runner/PlatformRouterImp.m:36
#8 0x0000000101a21eed in -[FLBFlutterApplication open:urlParams:exts:onPageFinished:completion:] at /Users/shengxichen/Desktop/Git/flutter_boost/ios/Classes/Engine/FLBFlutterApplication.m:181
#9 0x0000000101a26f1f in +[FlutterBoostPlugin open:urlParams:exts:onPageFinished:completion:] at /Users/shengxichen/Desktop/Git/flutter_boost/ios/Classes/Boost/FlutterBoostPlugin.m:166
#10 0x0000000101a1ce12 in -[UIViewControllerDemo present:] at /Users/shengxichen/Desktop/Git/flutter_boost/example/ios/Runner/UIViewControllerDemo.m:34
#11 0x000000010dd8f624 in -[UIApplication sendAction:to:from:forEvent:] ()
#12 0x000000010d7e48d5 in -[UIControl sendAction:to:forEvent:] ()
#13 0x000000010d7e4bf2 in -[UIControl _sendActionsForEvents:withEvent:] ()
#14 0x000000010d7e3ba8 in -[UIControl touchesEnded:withEvent:] ()
#15 0x000000010ddc84e6 in -[UIWindow _sendTouchesForEvent:] ()
#16 0x000000010ddc9bca in -[UIWindow sendEvent:] ()
#17 0x000000010dda830e in -[UIApplication sendEvent:] ()
#18 0x000000010de782b3 in __dispatchPreprocessedEventFromEventQueue ()
#19 0x000000010de7abd9 in __handleEventQueueInternal ()
#20 0x0000000104de0db1 in CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION ()
#21 0x0000000104de0633 in __CFRunLoopDoSources0 ()
#22 0x0000000104ddacef in __CFRunLoopRun ()
#23 0x0000000104dda4d2 in CFRunLoopRunSpecific ()
#24 0x0000000108b632fe in GSEventRunModal ()
#25 0x000000010dd8dfc2 in UIApplicationMain ()
#26 0x0000000101a1c8f0 in main at /Users/shengxichen/Desktop/Git/flutter_boost/example/ios/Runner/main.m:7
#27 0x000000010543a541 in start ()

FLBFlutterViewContainer类，第59行。Thread 1: EXC_BAD_ACCESS (code=EXC_I386_GPFLT)

[xujim]

这是flutter自身的一个voice over bug引起的。具体解法参考：flutter/engine#14155