我正在将'react-navigation'的DrawerNavigator整合到我的项目中作为this文档。但是当我运行项目时，单击Button时总会出现此错误：
TypeError：undefined不是对象（评估'this.props.navigation.navigate'）
当我从左向右滑动时，没有任何事情发生，没有抽屉打开。
我检查了this.props，它总是在控制台中记录空{}。我尝试了很多解决方案，但它仍然没有用。
calculator.js
export default class Calculator extends Component {
constructor(props) {
super(props);
}
static navigationOptions = {
drawerLabel: 'Calculator',
drawerIcon: ({ tintColor }) => (
<Image
source={require('./../../res/images/icon_calculator.png')}
style={[styles.icon, {tintColor: tintColor}]}
/>
),
};
render() {
return (
<View style={styles.container}>
<View>
<Text style={styles.title}>Tip Calculator</Text>
</View>
<Button
onPress={() => this.props.navigation.navigate("SettingsScreen")}
title="Go to settings"
/>
</View>
);
}
}
module.exports = Calculator;
settings.js
export default class Settings extends Component {
constructor(props) {
super(props);
}
static navigationOptions = {
drawerLabel: 'Settings',
drawerIcon: ({ tintColor }) => (
<Image
source={require('./../../res/images/icon_settings.png')}
style={[styles.icon, {tintColor: tintColor}]}
/>
),
};
render() {
return (
<View style={styles.container}>
<Text>Settings</Text>
<Button
onPress={() => this.props.navigation.goBack()}
title="Go back home"
/>
</View>
);
}
}
module.exports = Settings;
navigation.js
import {
DrawerNavigator
} from 'react-navigation';
import Calculator from './../components/calculator/calculator.js';
import Settings from './../components/settings/settings.js';
const RootDrawer = DrawerNavigator({
CalculatorScreen: {
path: '/',
screen: Calculator
},
SettingsScreen: {
path: '/sent',
screen: Settings
}
}, {
initialRouteName: 'CalculatorScreen',
drawerPosition: 'left'
});
export default RootDrawer;
App.js
export default class App extends Component<{}> {
render() {
return (
<Calculator/>
);
}
}
index.js
import { AppRegistry } from 'react-native';
import App from './App';
AppRegistry.registerComponent('rn_tip_calculator', () => App);
我是否必须使用StackNavigator和DrawerNavigator，或者我在配置中遗漏了什么？
完整的源代码，它只是一个简单的示例项目，请看看：https://github.com/HCMUS-IceTeaViet-SE/rn_tip_calculator
任何帮助将不胜感激。谢谢！
你可以使用dispatch api https://reactnavigation.org/docs/navigators/navigation-actions
1）导入导航动作
import { NavigationActions } from 'react-navigation'
2）调度导航动作：
const navigateAction = NavigationActions.navigate({
routeName: 'SettingsScreen',
params: {},
})
this.props.navigation.dispatch(navigateAction)
我对React-Native很新，但有时这也发生在我身上。
我正在使用Redux和堆栈导航器....但这是我的工作示例......
import { StackNavigator } from 'react-navigation'
import { Animated, Easing } from 'react-native'
import LoginScreen from '../Containers/LoginScreen'
import LaunchScreen from '../Containers/LaunchScreen'
import HomeScreen from '../Containers/HomeScreen'
import SignUpScreen from '../Containers/SignUpScreen'
import SettingsScreen from '../Containers/SettingsScreen'
import VehicleCreateScreen from '../Containers/VehicleCreateScreen'
import styles from './Styles/NavigationStyles'
// Manifest of possible screens
const PrimaryNav = StackNavigator({
LoginScreen: { screen: LoginScreen },
LaunchScreen: { screen: LaunchScreen },
HomeScreen: { screen: HomeScreen },
SignUpScreen: { screen: SignUpScreen },
SettingsScreen: { screen: SettingsScreen },
VehicleCreateScreen: { screen: VehicleCreateScreen }
}, {
// Default config for all screens
headerMode: 'none',
initialRouteName: 'LaunchScreen',
navigationOptions: {
headerStyle: styles.header
},
transitionSpec: {
duration: 0,
timing: Animated.timing,
easing: Easing.step0,
},
},
)
export default PrimaryNav
然后从未连接到REDUX的组件
import React, { Component } from 'react';
import { Container, Content, List, ListItem, Icon, Text, Button, Left, Right, Badge } from 'native-base';
import { Image } from 'react-native'
import styles from './Styles/SideBarStyle';
// import backgroundImage from '../Images/vw.jpg'
const backgroundImage = require("../Images/vw.jpg");
const drawerImage = require("../Images/dirtyHandsDark.jpg");
export default class SideBar extends Component {
constructor(props) {
super(props);
}
render() {
// *********** HERE WE DECLARE AN ARRAY TO RENDER LISTS FROM. THIS COULD ALSO BE LIST OF BIKES FROM STORE.. ***********
const datas = [
{
name: "Home",
route: "HomeScreen",
icon: "settings",
bg: "#C5F442",
},
{
name: "Repair",
route: "HomeScreen",
icon: "settings",
bg: "#C5F442",
},
{
name: "My Profile",
route: "SettingsScreen",
icon: "settings",
bg: "#C5F442",
},
];
return (
<Container>
<Content bounces={false} style={{ flex: 1, backgroundColor: "#fff", top: -1 }}>
<Image source={backgroundImage} style={styles.drawerCover}>
<Image square style={styles.drawerImage} source={drawerImage} />
</Image>
<List
dataArray={datas}
renderRow={data =>
// *********** CREATE NEW LIST ITEM ON CLICK NAVIGATE TO APPROPRIATE LISTITEM.SCREEN ***********
<ListItem button noBorder onPress={() => this.props.navigation.navigate(data.route)}>
<Left>
<Icon active name={data.icon} style={{ color: "#777", fontSize: 26, width: 30 }} />
<Text style={styles.text}>
{data.name}
</Text>
</Left>
{data.types &&
<Right style={{ flex: 1 }}>
<Badge
style={{
borderRadius: 3,
height: 25,
width: 72,
backgroundColor: data.bg,
}}
>
<Text style={styles.badgeText}>{`${data.types} Types`}</Text>
</Badge>
</Right>}
</ListItem>}
/>
</Content>
</Container>
);
}
}
你可以看到我引用this.props.navigation.navigate没问题。下面是我的回购参考。 https://github.com/GavinThomas1192/motoMechanicMeeKanic/tree/master/App
发生这种情况是因为我没有将我的DrawerNavigator“连接”到我的应用程序。
有两种方法可以实现这一目标：
index.js更改：
来自AppRegistry.registerComponent('rn_tip_calculator', () => App);
到AppRegistry.registerComponent('rn_tip_calculator', () => RootDrawer);
所以你可以删除App.js，因为它现在没用了。App组件（在App.js中）注册为app root组件。然后将App组件放入“连接”DrawerNavigator到应用程序。
export default class App extends Component<{}> {
render() {
return (
<RootDrawer/>
);
}
}
document没有说明如何将导航器连接到应用程序，没有关于寄存器组件或将导航器放在根组件中。这个驱动新手像我疯了！