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Render different tabs based on condition (isLogged) #1367

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lughino opened this issue Nov 11, 2016 · 5 comments
Closed

Render different tabs based on condition (isLogged) #1367

lughino opened this issue Nov 11, 2016 · 5 comments

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@lughino
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lughino commented Nov 11, 2016

Version

Tell us which versions you are using:

  • react-native-router-flux v3.36.0
  • react-native v0.36.0

Can I render different tabs based on application state condition?
I have an application that has sections that are only visible to logged in users, I wish that some tabs appear only if the user is logged in. I tried to do this with the component Switch:

selectRouterTab(props) {
  console.log('select tab', props);
  return props.isLogged ? 'authenticated' : 'notAuthenticated';
}
render() {
  const ConnectedSwitch =
    connect(state => ({ isLogged: state.user.isLogged }))(Switch);
  return (
    <RouterWithRedux getSceneStyle={getSceneStyle}>
      <Scene
        key="root"
        hideNavBar
        hideTabBar
        >
        <Scene key="tabbar" tabs tabBarStyle={styles.tabBarStyle}
          component={ConnectedSwitch}
          unmountScenes={true}
          selector={this.selectRouterTab}
          >
          <Scene key="notAuthenticated" tabs>
            <Scene key="superHome" title="Home" icon={TabIcon}
                iconTitle="home"
                navigationBarStyle={styles.navigationBarStyle}
                leftButtonStyle={styles.backButton}
                titleStyle={styles.titleStyle}>
              <Scene
                key="home"
                component={Home}
                renderRightButton={this.renderIcon}
              />
              <Scene
                key="postDetail"
                component={Detail}
                title=""
                navigationBarStyle={styles.navigationBarStyleDetail}
                hideTabBar
              />
            </Scene>
            <Scene key="settings" title="" icon={TabIcon}
              iconTitle="user">
              <Scene
                key="tab1_1"
                component={Progress}
                title="Settings"
              />
            </Scene>
          </Scene>
          <Scene key="authenticated" tabs>
            <Scene key="bookmark" component={Spinner} title="" icon={TabIcon}
               iconTitle="bookmark">
            </Scene>
            <Scene key="notification" component={Examples} title="Notifiche" icon={TabIcon}
               iconTitle="notification"/>
            <Scene key="settings" title="" icon={TabIcon}
              iconTitle="user">
              <Scene
                key="tab1_1"
                component={Bar}
                title="Settings"
              />
            </Scene>
          </Scene>
        </Scene>
      </Scene>
    </RouterWithRedux>
  );
}

however, I encountered a problem with this approach:
I had to repeat a scene settings and tab1_1, and this causes me the error console Key settings is already defined!

Is there a way to solve only show the tabs you want depending on a condition?
Even a different approach to achieve the desired result!

@dragfire
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Contributor

#1247
Hope this will help.

@lughino
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lughino commented Nov 11, 2016

@dragfire thanks for the quick answer.
But it seems not to be the same situation.
When the application is launched the initial route is already within the TabBar. Also launching Action.home({type: 'REMOVE_TWO_TABS'}) in componentDidMount they remain displayed.
Only when I press another tab, children are removed.
Another problem is that when I go to another tab, Do I login and back of the home tab, the tab children no longer appear. It seems that this will be permanently erased.

@lughino
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lughino commented Nov 12, 2016

Update ..
By using the method of removal of children through reducer I think definitely is not the correct solution.
The situation is this:

const reducerCreate = (params) => {
  const defaultReducer = new Reducer(params);
  return (state, action) => {
    switch(action.type) {
      case 'REMOVE_TWO_TABS':
        const children = _.merge([], state.children);
        if(children[0].children.length > 2)
          children[0].children.splice(1, 2);

        return _.assign({}, state, { children });
      default:
        return defaultReducer(state, action);
    }
  };
};

class AppNavigator extends Component {
  render() {
    <RouterWithRedux createReducer={reducerCreate} getSceneStyle={getSceneStyle}
        navigationBarStyle={styles.navigationBarStyle}
        leftButtonStyle={styles.backButton}
        titleStyle={styles.titleStyle}>
        <Scene
          key="root"
          hideNavBar
          hideTabBar
          >
          <Scene key="tabbar" tabs tabBarStyle={styles.tabBarStyle} initial>
            <Scene key="superHome" title="Home" icon={TabIcon}
              iconTitle="home">
              <Scene
                key="home"
                component={Home}
                title="HOME"
                renderRightButton={this.renderIcon}
              />
              <Scene
                key="postDetail"
                component={Detail}
                title=""
                navigationBarStyle={styles.navigationBarStyleDetail}
                hideTabBar
              />
            </Scene>
            <Scene key="bookmark" component={Bookmark} title="" icon={TabIcon}
                  iconTitle="bookmark">
            </Scene>
            <Scene key="notification" component={Notification} title="" icon={TabIcon}
                  iconTitle="notification"/>
            <Scene key="settings" title="" icon={TabIcon}
              iconTitle="user">
              <Scene
                key="tab1_1"
                component={Settings}
                title="Settings"
              />
            </Scene>
          </Scene>
        </Scene>
      </RouterWithRedux>
  }
}

class Home extends Component {
  componentWillMount() {
    if(!this.props.isLogged) {
      setTimeout(() => {
        Actions.tabbar({ type: 'REMOVE_TWO_TABS' });
      }, 0);
    }
  }
  // ...
}

Even calling the action that removes type in componentDidMount nothing happens, unless use a setTimeout to delay the call to action REMOVE_TWO_TABS.
But this means that for a moment I see all tabs.

The second issue is that if the user logs in, I have to show all tabs, which means that when I remove the tabs I have to save them somewhere and when the user logs I have to put them ..
This does not seem a good behavior ..

So, there is a right way to hide / show tab depending on a condition?
I tried using the "switch" component and with this solution but I can not find answer.
I think what I want to achieve is not a strange thing!

Could you please tell me the solution to the problem?

@klaussa
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klaussa commented Mar 8, 2017

Looking for a solution for this too.

@Maxwell2022
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You don't have to dispatch your action REMOVE_TWO_TABS in a component.
You can dispatch it before your LOGIN_SUCCESS_ACTION for instance, so you can remove the tab before to navigate to home scene.
When the user logout, you can re-initialise the scenes to restore all the tabs that you've previously deleted.

aksonov added a commit that referenced this issue Jul 8, 2017
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V4 announcement, v3 is obsolete now.
@aksonov aksonov closed this as completed in 97e89ae Jul 8, 2017
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