Reactjs 不变冲突：无效的挂钩调用（react native）

我正面临屏幕上显示的问题，当我试图调用底部导航中的类时，我得到以下错误。我已经附上代码，请建议一个更好的方法来做它

这是我的主类，在这个类中，我试图调用BlockList类

import React,{ Component } from 'react';
import { Platform, StyleSheet, Text, View } from 'react-native';

import { createMaterialBottomTabNavigator } from 'react-navigation-material-bottom-tabs';
import  { createAppContainer } from 'react-navigation' 
import Feather from 'react-native-vector-icons/Feather';
import AntIcons from 'react-native-vector-icons/AntDesign';
import MaterialIcons from 'react-native-vector-icons/MaterialIcons';

import BlockList from './components/BlockList';
import CallHeist from './components/CallHeist';
import OtpHeist from './components/OtpHeist';


const Navigator =  createMaterialBottomTabNavigator({

  BlockList: {screen: () => <BlockList />, navigationOptions: {
    tabBarLabel: 'abcd',
    tabBarIcon:({tintColor}) => (
      <MaterialIcons name="block" color={tintColor} size={20}/>
    )
  }}
}, {

  initialRouteName: 'abcd',
  activeColor: '#F44336',
  barStyle: { backgroundColor: '#fff' }
  }
);


export default createAppContainer(Navigator);

 class BlockList extends Component {
        render() {
                  return (
                  <View>

                  </View>);
    }
}

    export default BlockList;

import React，{Component}来自'React'；
从“react native”导入{平台、样式表、文本、视图}；
从“反应导航材料底部选项卡”导入{createMaterialBottomTabNavigator}；
从“反应导航”导入{createAppContainer}
从“反应本机向量图标/羽毛”导入羽毛；
从“反应本机向量图标/AntDesign”导入反密码；
从“反应本机矢量图标/唯物主义者”导入唯物主义者；
从“./components/BlockList”导入区块列表；
从“./components/CallHeist”导入CallHeist；
从“./components/OtpHeist”导入OtpHeist；
const Navigator=createMaterialBottomTabNavigator({
区块列表：{screen:（）=>，导航选项：{
tabBarLabel:'abcd'，
tabBarIcon:（{tintColor}）=>(
)
}}
}, {
initialRouteName:'abcd'，
activeColor:“#F44336”，
barStyle:{backgroundColor:'#fff'}
}
);
导出默认createAppContainer（导航器）；

区块列表类

import React,{ Component } from 'react';
import { Platform, StyleSheet, Text, View } from 'react-native';

import { createMaterialBottomTabNavigator } from 'react-navigation-material-bottom-tabs';
import  { createAppContainer } from 'react-navigation' 
import Feather from 'react-native-vector-icons/Feather';
import AntIcons from 'react-native-vector-icons/AntDesign';
import MaterialIcons from 'react-native-vector-icons/MaterialIcons';

import BlockList from './components/BlockList';
import CallHeist from './components/CallHeist';
import OtpHeist from './components/OtpHeist';


const Navigator =  createMaterialBottomTabNavigator({

  BlockList: {screen: () => <BlockList />, navigationOptions: {
    tabBarLabel: 'abcd',
    tabBarIcon:({tintColor}) => (
      <MaterialIcons name="block" color={tintColor} size={20}/>
    )
  }}
}, {

  initialRouteName: 'abcd',
  activeColor: '#F44336',
  barStyle: { backgroundColor: '#fff' }
  }
);


export default createAppContainer(Navigator);

 class BlockList extends Component {
        render() {
                  return (
                  <View>

                  </View>);
    }
}

    export default BlockList;

类块列表扩展组件{
render（）{
返回(
);
}
}
导出默认阻止列表；