在 React Native Router Flux Tabbar 中以编程方式隐藏和显示各个选项卡 [英] Programatically hiding and showing individual tabs in React Native Router Flux Tabbar

问题描述

我的应用中有一个使用 React Native Router Flux 的标签栏.在一些用例中，基于当前用户隐藏或显示特定选项卡会非常有帮助.我遇到的主要是:

I have a tabbar in my app using React Native Router Flux. There are a couple use cases where hiding or showing specific tabs based on the current user would be very helpful. The main ones I have run into are:

• AB 针对特定用户测试新标签
• 向具有特定权限的特定用户显示特殊的管理标签

就我所见，react-native-router-flux 库不支持任何选项来执行此操作.我怎样才能实现这个功能?

The react-native-router-flux library does not support any options to do this from what I can see. How can I achieve this functionality?

推荐答案

react-native-router-flux 中的默认 tabbar 组件只是来自 react-navigation-tabs 库的组件.你可以将这个组件直接导入到你的代码中，根据需要进行自定义，然后通过 tabBarComponent 属性(此处记录).

The default tabbar component in react-native-router-flux is just the component from the react-navigation-tabs library. You can import this component directly into your code, customize as needed, and then pass it to react-native-router-flux through the tabBarComponent prop (documented here).

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

I created a new component, which you should be able to copy directly and just change the logic for actually hiding the tabs based on your state:

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)

然后简单地将其导入并在我的 Tabs 组件中使用:

And then simply imported and used that in my Tabs component:

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

详细查看这些东西被传递到哪里

看着 the linereact-native-router-flux 的源，它使用 react-navigation 库中的 createBottomTabNavigator，如果不通过自定义 tabBarComponent.react-navigation 中的 createBottomTabNavigator 方法来自 来自库的这一行，实际上是在 react-navigation-tabs 中定义的.现在，我们可以这里 在 react-navigation-tabs 中看到，如果没有传递 tabBarComponent，它只会使用BottomTabBar，也在 react-navigation-tabs 中定义.这个BottomTabBar，反过来，通过 props 获取自定义标签按钮渲染器，称为 getButtonComponent.

Looking at 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, called getButtonComponent.

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