将根设置为带图标的bottomTab时，React-Native-Navigation崩溃

Question

我将React-Native-Navigation v2.18.5与React Native 0.59.8一起使用，当我尝试将Navigation.setRoot（...）与bottomTabs布局一起使用时，应用程序崩溃了。控制台中什么都没有显示，但是logcat显示了此内容：

   java.lang.RuntimeException: Tried to get null value!
       at com.reactnativenavigation.parse.params.Param.get(Param.java:14)
       at com.reactnativenavigation.viewcontrollers.bottomtabs.BottomTabsController.lambda$createTabs$3(BottomTabsController.java:155)
       at com.reactnativenavigation.viewcontrollers.bottomtabs.-$$Lambda$BottomTabsController$hVDDSxSvqNX-4DhQHls8ynB4x2w.map(Unknown Source:4)
       at com.reactnativenavigation.utils.CollectionUtils.map(CollectionUtils.java:42)
       at com.reactnativenavigation.viewcontrollers.bottomtabs.BottomTabsController.createTabs(BottomTabsController.java:151)
       at com.reactnativenavigation.viewcontrollers.bottomtabs.BottomTabsController.createView(BottomTabsController.java:75)
       at com.reactnativenavigation.viewcontrollers.ViewController.getView(ViewController.java:167)
       at com.reactnativenavigation.viewcontrollers.ParentController.getView(ParentController.java:60)
       at com.reactnativenavigation.viewcontrollers.navigator.RootPresenter.setRoot(RootPresenter.java:35)
       at com.reactnativenavigation.viewcontrollers.navigator.Navigator.setRoot(Navigator.java:135)
       at com.reactnativenavigation.react.NavigationModule.lambda$setRoot$1(NavigationModule.java:70)
       at com.reactnativenavigation.react.-$$Lambda$NavigationModule$IfiDeOnYfgJADKZUxIVN9Zforsw.run(Unknown Source:8)
       at android.os.Handler.handleCallback(Handler.java:873)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loop(Looper.java:193)
       at android.app.ActivityThread.main(ActivityThread.java:6669)
       at java.lang.reflect.Method.invoke(Native Method)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

这是我的代码：

import { Navigation } from "react-native-navigation";

import Icon from "react-native-vector-icons/Ionicons";

const startMainTabs = () => {
  Promise.all([
    Icon.getImageSource("md-body", 30),
    Icon.getImageSource("md-time", 30)
  ])
    .then(sources => {
      console.log("GOT IMAGES");
      console.log(sources[0], sources[1]);
      Navigation.setRoot({
        root: {
          bottomTabs: {
            children: [
              {
                component: {
                  name: "fitboard.myworkouts",
                  options: {
                    buttomTab: {
                      text: "MyWorkouts",
                      icon: sources[0]
                    }
                  }
                }
              },
              {
                component: {
                  name: "fitboard.hiittimer",
                  options: {
                    bottomTab: {
                      text: "HIITTimer",
                      icon: sources[1]
                    }
                  }
                }
              }
            ]
          }
        }
      });
    })
    .catch(err => {
      console.log(err);
    });
};

export default startMainTabs;

这些屏幕也在我的App.js中注册：

Navigation.registerComponent(`fitboard.hiittimer`, () => HiitTimer);

Navigation.registerComponent(`fitboard.myworkouts`, () => MyWorkouts);

如您所见，我正在提供图标，所以这不是问题。此外，当我使用组件布局时，react-native-navigation不会使我的应用程序崩溃。有什么想法吗？