[Bug]: iOS 17.7.2（iphone12）跳转 创建FBFlutterViewContainer时候卡死

[xieyinghao]

请描述遇到的问题，以及您所期望的正确的结果

(同一个设备，多次调试，存在显示正常和显示失败卡死的情况)，其他一些设备是可以正常使用。 使用官方提供的demo，delegate代码如下：

• (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame: [UIScreen mainScreen].bounds]; [self.window makeKeyAndVisible];

  FlutterBoostSetupOptions* options = [FlutterBoostSetupOptions createDefault]; options.dartEntryPointArgs = @[ @"I'm from IOS!", @"--for-test" ];

  MyFlutterBoostDelegate* delegate=[[MyFlutterBoostDelegate alloc ] init]; [[FlutterBoost instance] setup:application delegate:delegate callback:^(FlutterEngine engine) { NSObject<FlutterPluginRegistrar> registrar = [engine registrarForPlugin:@"plugin-name"]; FLNativeViewFactory* factory = [[FLNativeViewFactory alloc] initWithMessenger:registrar.messenger]; [[engine registrarForPlugin:@""] registerViewFactory:factory withId:@""]; } options:options];

  UIViewControllerDemo *vc = [[UIViewControllerDemo alloc] initWithNibName:@"UIViewControllerDemo" bundle:[NSBundle mainBundle]]; vc.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"hybrid" image:nil tag:0];

  FBFlutterViewContainer *fvc = [[FBFlutterViewContainer alloc] init] ;

  [fvc setName:@"tab_friend" uniqueId:nil params:@{} opaque:YES]; fvc.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"flutter_tab" image:nil tag:1];

  UITabBarController *tabVC = [[UITabBarController alloc] init]; tabVC.viewControllers = @[vc,fvc];

  UINavigationController *rvc = [[UINavigationController alloc] initWithRootViewController:tabVC];

  delegate.navigationController=rvc;

  self.window.rootViewController = rvc;

  UIButton *nativeButton = [UIButton buttonWithType:UIButtonTypeCustom]; nativeButton.frame = CGRectMake(self.window.frame.size.width * 0.5 - 50, 200, 100, 40); nativeButton.backgroundColor = [UIColor redColor]; [nativeButton setTitle:@"push native" forState:UIControlStateNormal]; [nativeButton addTarget:self action:@selector(pushNative) forControlEvents:UIControlEventTouchUpInside]; [self.window addSubview:nativeButton];

  UIButton *pushEmbeded = [UIButton buttonWithType:UIButtonTypeCustom]; pushEmbeded.frame = CGRectMake(self.window.frame.size.width * 0.5 - 70, 150, 140, 40); pushEmbeded.backgroundColor = [UIColor redColor]; [pushEmbeded setTitle:@"push embedded" forState:UIControlStateNormal]; [pushEmbeded addTarget:self action:@selector(pushEmbeded) forControlEvents:UIControlEventTouchUpInside]; [self.window addSubview:pushEmbeded];

  return YES; }

当打印如下，即正常显示：

Failed to instantiate the default view controller for UIMainStoryboardFile 'Main' - perhaps the designated entry point is not set? flutter: The Dart VM service is listening on http://127.0.0.1:64296/10u-9h5XPkE=/ flutter: FlutterBoost_dart#page_visibility, #addGlobalObserver, Instance of 'AppGlobalPageVisibilityObserver' flutter: FlutterBoost_dart#boost_flutter_binding: handleAppLifecycleStateChanged AppLifecycleState.resumed flutter: dartEntrypointArgs: [I'm from IOS!, --for-test] flutter: FlutterBoost_dart#restoreStackForHotRestart, null, null flutter: FlutterBoost_dart#saveStackForHotRestart, [1748248963846/], {1748248963846/: Instance of 'FlutterContainer'}

当打印如下，加载失败，界面卡死： Failed to instantiate the default view controller for UIMainStoryboardFile 'Main' - perhaps the designated entry point is not set? flutter: The Dart VM service is listening on http://127.0.0.1:64296/10u-9h5XPkE=/ flutter: FlutterBoost_dart#page_visibility, #addGlobalObserver, Instance of 'AppGlobalPageVisibilityObserver' flutter: FlutterBoost_dart#boost_flutter_binding: handleAppLifecycleStateChanged AppLifecycleState.resumed flutter: dartEntrypointArgs: [I'm from IOS!, --for-test]

跳转代码：

    self.flutterContainer = [[FBFlutterViewContainer alloc] init];
    [self.flutterContainer setName:@"dbs_BatteryInfo" uniqueId:nil params:@{@"electricValue":electricValue,@"LanguageStr":LanguageStr} opaque:YES];
    self.view.backgroundColor = [UIColor blackColor];
    self.flutterContainer.view.backgroundColor = [UIColor blackColor];
    self.flutterContainer.view.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);
    [self.view addSubview:self.flutterContainer.view];
    [self addChildViewController:self.flutterContainer];

请说明如何操作会遇到上述问题

No response

在下面填入关键复现代码

复现的平台

Both

Flutter SDK版本

Dart 3.6.1

FlutterBoost版本

4.3.0

是否延迟初始化FlutterBoost

No

解决方案

在delegate初始化 ：FBFlutterViewContainer *fvc = [[FBFlutterViewContainer alloc] init]; 神奇解决

[AnnyName]

你好，你说的 FlutterBoost版本 4.3.0

是在yaml文件中这么配置的 flutter_boost: git: url: 'https://github.com/alibaba/flutter_boost.git' ref: '4.3.0' 的吗？ 我看到没有这个版本呢？

[xieyinghao]

你好，你说的 FlutterBoost版本 4.3.0

是在yaml文件中这么配置的 flutter_boost: git: url: 'https://github.com/alibaba/flutter_boost.git' ref: '4.3.0' 的吗？ 我看到没有这个版本呢？

4.6.5 也是一样的（4.3.0，是2023年用的）

[AnnyName]

你好，你说的 FlutterBoost版本 4.3.0 是在yaml文件中这么配置的 flutter_boost: git: url: 'https://github.com/alibaba/flutter_boost.git' ref: '4.3.0' 的吗？ 我看到没有这个版本呢？

4.6.5 也是一样的（4.3.0，是2023年用的）

我现在用的是4.6.5的版本。根据你提供的思路，还是没有解决卡死的问题。

[xiaopipixia]

我在4.6.5上也是一样的问题，初始化FBFlutterViewContainer卡死

[xieyinghao]

用官方的demo调试看看

[xieyinghao]

我在4.6.5上也是一样的问题，初始化FBFlutterViewContainer卡死

是的，试试delegate初始化看看有没有效果

[xiaopipixia]

我在4.6.5上也是同样的问题，初始化FBFlutterViewContainer卡死

是的，尝试委托初始化看看有没有效果

好的

[yaotiancheng-ola]

解决方案在这里 https://github.com/alibaba/flutter_boost/issues/2201#issuecomment-2957935156

[xiaopipixia]

解决方案在这里#2201（评论）

取消预热warmUpEngine，iOS上会导致首次打开flutter页面闪烁白屏，但是如果加上，就会卡死

[HeHuiqi]

FlutterBoost.m 中的预热引擎方法如下：

/// 提前预热引擎
- (void)warmUpEngine {
  FlutterViewController* vc = [[FlutterViewController alloc] initWithEngine:self.engine
                                                                    nibName:nil bundle:nil];
//卡死页面的代码地方
//下面这几行代码的调用时机应在在addChildVC后，没有addChildVC直接调用会有问题
  [vc beginAppearanceTransition:YES animated:NO];
  [vc endAppearanceTransition];
  [vc beginAppearanceTransition:NO animated:NO];
  [vc endAppearanceTransition];
}

解决方法：

1. 初始化时关闭预热 AppDelegate.swift

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        
        let ops:FlutterBoostSetupOptions = FlutterBoostSetupOptions()
        //关闭预热
        ops.warmUpEngine = false
        let delegate = MyBoostAppDelegate.shared
        FlutterBoost.instance().setup(application, delegate: delegate, callback: { engine in
                                        
        }, options: ops)
        return true
    }

2. 手动预热，最好在window的根控制器中，或其他控制器中，自己根据情况选择 ViewController.swift

    override func viewDidLoad() {
        super.viewDidLoad()
        //手动预热
        if let eg = FlutterBoost.instance().engine() {
           let vc = FBFlutterViewContainer(engine: eg, nibName: nil, bundle: nil)
            //隐藏视图
            vc.view.isHidden = true
            self.addChild(vc)
            vc.beginAppearanceTransition(true, animated: false)
            vc.endAppearanceTransition()
            vc.beginAppearanceTransition(false, animated: false)
            vc.endAppearanceTransition()
        }