以编程方式隐藏和显示 React Native Router Flux Tabbar 中的各个选项卡

Question

我的应用程序中有一个选项卡栏使用 React Native Router Flux。在一些用例中，根据当前用户隐藏或显示特定选项卡会非常有帮助。我运行主要关注的是：

AB 测试特定用户的新标签
向具有特定权限的特定用户显示特殊的管理选项卡

据我所知，react-native-router-flux 库不支持执行此操作的任何选项。我怎样才能实现这个功能？

Answer 1

react-native-router-flux 中默认的 tabbar 组件就是 react-navigation-tabs 库中的组件。您可以将此组件直接导入到您的代码中，根据需要进行自定义，然后通过 tabBarComponent prop (documented here).

将其传递给 react-native-router-flux

我创建了一个新组件，您应该可以直接复制它并根据您的状态更改实际隐藏选项卡的逻辑：

import React from 'react'
import { BottomTabBar } from 'react-navigation-tabs'
import { View, TouchableWithoutFeedback } from 'react-native'
import { connect } from 'react-redux'

const HiddenView = () => <View style={{ display: 'none' }} />
const TouchableWithoutFeedbackWrapper = ({
  onPress,
  onLongPress,
  testID,
  accessibilityLabel,
  ...props
}) => (
  <TouchableWithoutFeedback
    onPress={onPress}
    onLongPress={onLongPress}
    testID={testID}
    hitSlop={{
      left: 15,
      right: 15,
      top: 5,
      bottom: 5,
    }}
    accessibilityLabel={accessibilityLabel}
  >
    <View {...props} />
  </TouchableWithoutFeedback>
)
const TabBarComponent = props => (
  <BottomTabBar
    {...props}
    getButtonComponent={({ route }) => {
      if (
        (route.key === 'newTab' && !props.showNewTab) ||
        (route.key === 'oldTab' && props.hideOldTab)
      ) {
        return HiddenView
      }
      return TouchableWithoutFeedbackWrapper
    }}
  />
)

export default connect(
  state => ({ /* state that you need */ }),
  {},
)(TabBarComponent)

然后简单地导入并在我的选项卡组件中使用它：

<Tabs
  key="main"
  tabBarComponent={TabBarComponent} // the component defined above
  ...

详细看看这些东西被传递到哪里

正在看the line of the source of react-native-router-flux, it is using createBottomTabNavigator from the react-navigation library, and passing no component if you do not pass a custom tabBarComponent. The createBottomTabNavigator method in react-navigation comes from this line of the library, and is actually defined in react-navigation-tabs. Now, we can here see in react-navigation-tabs that if no tabBarComponent has been passed, it simply uses BottomTabBar, also defined in react-navigation-tabs. This BottomTabBar, in turn, takes a custom tab button renderer through props，叫getButtonComponent。

以编程方式隐藏和显示 React Native Router Flux Tabbar 中的各个选项卡

Programatically hiding and showing individual tabs in React Native Router Flux Tabbar

react-native

react-native-router-flux

react-native-navigation