React Native中的TabBarBottom不显示图标/图像

Question

我几乎从TabNavigator文档中获取了示例代码,而图标/图像根本没有出现在iOS或Android上.即使标签覆盖似乎也没有生效.我究竟做错了什么？

这是我一直在使用的文档的链接:https: //reactnavigation.org/docs/navigators/tab

这是我的代码:

class MyHomeScreen extends React.Component {
  static navigationOptions = {
    tabBarLabel: 'Not displayed',
    // Note: By default the icon is only shown on iOS. Search the showIcon option below.
    tabBarIcon: ({ tintColor }) => (
      <Image
        source={require('./chats-icon.png')}
        style={[styles.icon, {tintColor: tintColor}]}
      />
    ),
  };

  render() {
    return (
      <Button
        onPress={() => this.props.navigation.navigate('Notifications')}
        title="Go to notifications"
      />
    );
  }
}

class MyNotificationsScreen extends React.Component {
  static navigationOptions = {
    tabBarLabel: 'Notifications',
    tabBarIcon: ({ tintColor }) => (
      <Image
        source={require('./notif-icon.png')}
        style={[styles.icon, {tintColor: tintColor}]}
      />
    ),
  };

  render() {
    return (
      <Button
        onPress={() => this.props.navigation.goBack()}
        title="Go back home"
      />
    );
  }
}

const styles = StyleSheet.create({
  icon: {
    width: 26,
    height: 26,
  },
});

const MyApp = TabNavigator({
  Displayed: {
    screen: MyHomeScreen,
  },
  Notifications: {
    screen: MyNotificationsScreen,
  },
}, {
  tabBarOptions: {
    activeTintColor: '#e91e63',
  },
});

Answer 1

好吧,在我想把脸撞到键盘上后,我终于想通了.

标题和标签栏图标实际上是与文档内部不同的结构.

  const MyApp = TabNavigator({
    Displayed: {
      screen: MyHomeScreen,
      navigationOptions: {
          title: 'Favorites',
          tabBar: {
            icon: ({tintColor}) => (<Image
              source={require('./chats-icon.png')}
              style={{width: 26, height: 26, tintColor: tintColor}}
            />)
          },
      },
    },
    ...

要么

 class MyHomeScreen extends React.Component {
    static navigationOptions = {
        title: 'Foo Bar',
        tabBar: {
            icon: ({ tintColor }) => (
              <Image
                source={require('./chats-icon.png')}
                style={{width: 26, height: 26, tintColor: tintColor}}
              />
            ),
        }
      };
 ...