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这是我的第一个 React Native 项目,我被卡住了,需要帮助。以下是我的代码。我想做的是跟随。
App.Js
/**
* Sample React Native App
* https://github.com/facebook/react-native
*
* @format
* @flow Strict-local
*/
import React from 'react';
import App from './src';
import { ProvIDer as PaperProvIDer } from 'react-native-paper';
export default App;
src/navigations/index.Js
import * as React from 'react';
import { Text,VIEw,StyleSheet,FlatList,SafeAreaVIEw } from 'react-native';
import { List,button,TexTinput,FAB,Avatar,Card,title,Paragraph } from 'react-native-paper';
import { NavigationContainer } from '@react-navigation/native';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import { createStackNavigator} from '@react-navigation/stack';
import ProjectList from '_scenes/projects';
import NewProject from '_scenes/projects/addproject';
import ProjectDetail from '_scenes/projects/projectdetails';
import SetTings from '_scenes/setTings';
const Tab = createBottomTabNavigator();
const Projects = ({ navigation }) => (
<ProjectList navigation={navigation} />
);
function SetTingsScreen( { navigation} ) {
return (
<SetTings />
);
}
export default function App() {
return (
<NavigationContainer>
<Tab.Navigator initialRoutename="HomeScreen">
<Tab.Screen name="Home" component={Projects} options={{ tabbarBadge: 3 }}/>
<Tab.Screen name="SetTings" component={SetTingsScreen} options={{ tabbarBadge: 2 }}/>
</Tab.Navigator>
</NavigationContainer>
);
}
import React,{ useEffect,useState } from 'react';
import { ActivityInDicator,Text,VIEw } from 'react-native';
import { Item,List,button } from 'react-native-paper';
import { NavigationContainer } from '@react-navigation/native';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import { createStackNavigator} from '@react-navigation/stack';
import NewProject from '_scenes/projects/addproject';
import ProjectDetail from './projectdetails';
ProjectList = ({ navisation }) => {
const [isLoading,setLoading] = useState(true);
const [data,setData] = useState([]);
useEffect(() => {
fetch('http://xxx.xxx.xxx.xxx/projects')
.then((responsE) => response.Json())
.then((Json) => setData(Json))
.catch((error) => console.error(error))
.finally(() => setLoading(false));
},[]);
function Projects ( {navigation }) {
return (
<VIEw style={{ flex: 1,padding: 24 }}>
<FlatList
data={data}
keyExtractor={({ ID },indeX) => ID}
renderItem={renderProject}
/>
</VIEw>
)
}
const renderProject = ({ navigation,item }) => (
<List.Item
title={item.title}
description={item.description}
onPress={() => navigation.navigate('ProjectDetails')}
/>
);
const AddProject = ({ navigation }) => (
<NewProject />
);
function ProjectDetails({navigation}) {
return (
<ProjectDetail />
);
}
function Chat({navigation}) {
return (
<VIEw>
<Text>Chat</Text>
</VIEw>
);
}
const Stack = createStackNavigator();
return (
<Stack.Navigator>
<Stack.Screen title="Home" name="Home" component={Projects} options={{headerShown: falsE}}/>
<Stack.Screen title="Add Project" name="AddProject" component={AddProject} />
<Stack.Screen title="Project Details" name="ProjectDetails" component={ProjectDetails} />
<Stack.Screen title="Chat" name="Chat" component={Chat} />
</Stack.Navigator>
);
};
export default ProjectList;
如果您看到“renderProject
”,我想在点击时导航到“ProjectDetails
”。但我收到错误 'TypeError: undefined is not an object (evaluaTing 'navigation.navigate')'
让我知道出了什么问题?
暂无找到可以解决该程序问题的有效方法,小编努力寻找整理中!
如果你已经找到好的解决方法,欢迎将解决方案带上本链接一起发送给小编。
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