React-Navigation jumpToIndex undefined

Question

我收到这个错误。我试图让用户按下选项卡，内容滚动到顶部，但我得到了跳转到索引不是一个功能

这是我的代码：

const NavigationBar = createBottomTabNavigator({
Home: {
screen: HomeNav, navigationOptions: ({ navigation }) => ({
title: 'Home',
tabBarOnPress: (scene, jumpToIndex) => {
console.log('onPress:', scene.route);
jumpToIndex(scene.index);
},
}),
}
})

Answer 1

根据您的活动版本的react导航，jumpToIndex方法可能会折旧，您可以访问此处的文档https://reactnavigation.org/docs/bottom-tab-navigator/#tabpress了解如何在选项卡聚焦后滚动到顶部。

Answer 2

我猜您使用的是react原生导航v4，但您的代码已弃用

https://reactnavigation.org/docs/4.x/material-bottom-tab-navigator/#tabbaronpress

const NavigationBar = createBottomTabNavigator({
Home: {
screen: HomeNav, navigationOptions: ({ navigation }) => ({
title: 'Home',
tabBarOnPress: ({navigation, defaultHandler}) => {
// your logic
},
}),
}
})