params is undefined in custom Tabbar

[vit134]

Version

Tell us which versions you are using:

• react-native-router-flux v4.0.0-beta.31
• react-native v0.55.2

Expected behaviour

I need to create custom tabBar, and in navigationState.routes.params i expect params of my scene but navigationState.routes.params is undefined

Actual behaviour

navigationState.routes.params is undefined

Steps to reproduce

const TabBar = ({ navigationState, jumpToIndex }) => {
    const routes = navigationState.routes;
    
    return (
        routes.map((el, i) => {
            return (
                <View key={i}><Text>{el.params ? el.params.title : 'no params'}</Text></View>
            );
        })
    )
}
<Scene 
    initial={this.props.first ? false : true} 
    key="tabbar" 
    tabs={true}
    tabBarStyle={styles.tabBarStyle} 
    tabBarComponent={TabBar}
    navigationBarStyle={styles.navigationBarStyle} 
    labelStyle={styles.label}
    activeTintColor={colorRed}>
    <Scene initial key="time" title="Time" component={Time} iconName="ios-clock" icon={TabIcon} hideNavBar/>
    <Scene  key="alarm" title="Alarm" iconName="ios-alarm" icon={TabIcon}>
        <Scene key="alarm" component={Alarm} title="Alarm" hideNavBar />
        <Scene key="alarmAdd" component={AlarmAdd} title="Add alarm" hideNavBar />
        <Scene key="alarmTitleModal" component={AlarmTitleModal} direction="vertical" title="Title" hideNavBar />
        <Scene key="alarmRepeatModal" component={AlarmRepeatModal} direction="vertical" hideNavBar />
    </Scene>
    <Scene  key="settings" title="Settings" iconName="ios-settings" icon={TabIcon} hideNavBar>
        <Scene initial key="settings-all" component={Settings} title="Settings" />
        <Scene key="settingsUser" component={SettingsUser} title="User settings" back={true} hideNavBar={false}/>
        <Scene key="settingsTime" component={SettingsTime} title="User time" back={true} hideNavBar={false}/>
        <Scene key="settingsFontColor" component={SettingsFontColor} title="Font color"/>
        <Scene key="settingsBrightness" component={SettingsBrightness} title="Brightness"/>
    </Scene>
</Scene>

[aksonov]

Please check latest version based on react navigation 2.x - 4.0.0-beta.40