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[英]Navigation from the header of the bottom tab navigator in react native
[英]Trigger Class Function Call from Tab Navigator Tab Press - React Native/Navigation
我有一个TabNavigator组件,并且希望在按下Tab键时重置各个“ Tab屏幕”状态。 如何在Tab键按下时调用类(组件)方法? 我看过tabBarOnPress,但这需要父级(TabNavigator)的函数。 我希望触发类方法,并且我不想导出该方法。
假设您有这样的TabNavigator
const HOME = TabNavigator({
[SCREENS.EXPLORESCREEN]: { screen: ExploreScreen },
[SCREENS.ASKSCREEN]: { screen: AskScreen },
},{
initialRouteName: SCREENS.EXPLORESCREEN
})
const PrimaryNav = StackNavigator({
[SCREENS.HOMESCREEN]: {
screen: HOME,
navigationOptions=({navigation})=>{
return{
tabBarOnPress :()=>{
if (typeof navigation.state.params.cancelState!=="undefined"){
navigation.state.params.cancelState()
}
else{
//your stuff
}
}
}
}
},
},
{
// Default config for all screens
headerMode: "screen",
initialRouteName: SCREENS.HOMESCREEN
,
}
);
ExploreScreen.js
class ExploreScreen extends Component {
componentDidMount(){
this.props.navigation.setParams({
cancelState:this.cancelState
})
}
cancelState=()=>{
//your Stuff
}
}
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