我现在看到了你的问题。使用 react-navigation,
navigation props 存在于组件中:要么组件配置在您在 App.js 中定义的路由配置对象中,要么使用 withNavigation HOC (https://reactnavigation.org/docs/en/with-navigation.html )。
现在在 Medicine_listDetail 组件中 this.props.navigation 不存在,因为 Medicine_listDetail 并没有出现在您的路线中,而且 props 对象不应被 this.props 在功能组件中读取。您可以采用以下两种方式之一:
const Medicine_listDetail = ({medicine, navigation}) => {
// i'm passing navigation props comme from parent component that have
// navigation object
// ...
}
// OR you can do
const Medicine_listDetail = (props) => {
const { medicine, navigation } = props;
// i'm passing navigation props comme from parent component that have
// navigation object
// ...
}
因此,以下是对我有用的解决方案的尝试。
-
Medicine_listDetail 组件:我传递的导航道具来自
具有导航对象的父组件
...
const Medicine_listDetail = ({medicine, navigation}) => {
const {title, coordinate} = medicine;
const {
headerContentStyle,
headerTextStyle,
cityTextStyle,
addTextStyle,
infoContainerStyle,
buttonsContainerStyle,
specialityTextStyle,
buttonStyle,
textStyle
} = styles
return (
<View>
<View style={headerContentStyle}>
<Text style={headerTextStyle}>{title}</Text>
</View>
<View style={buttonsContainerStyle}>
<ButtonCarte onPress={() => navigation.navigate('Carte') }>
</ButtonCarte>
</View>
</View>
);
};
...
const ButtonCarte = ({onPress, children}) => {
const {buttonStyle, textStyle} = styles;
return (
<TouchableOpacity onPress={() => onPress()} style={buttonStyle}>
<Ionicons name={'ios-pin'} size={20} color="white" />
<Text style={textStyle}>
Voir La Carte
</Text>
</TouchableOpacity>
);
};
-
Medicin 组件:在 all_medicine() 函数中,我在 Medicine_listDetail 组件的 props 中传递导航对象。所以这就是诀窍。
export default class Medicin extends React.Component {
constructor(props) {
super(props);
this.state = {
list_allMedicine: data_allMedicine,
selectedIndex: 0,
};
this.updateIndex = this.updateIndex.bind(this);
}
updateIndex(selectedIndex) {
this.setState({ selectedIndex });
}
all_medicine() {
const { navigation } = this.props;
return this.state.list_allMedicine.map(medicine => (
<Medicine_listDetail key={medicine.title} medicine={medicine} navigation={navigation} />
));
}
render() {
const buttons = ['Tout', '...', '...', '...'];
const { selectedIndex } = this.state;
return (
<View style={{ flex: 1}}>
<View
style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
<ButtonGroup
onPress={this.updateIndex}
selectedIndex={selectedIndex}
buttons={buttons}
containerStyle={{ borderRadius:8 }}
/>
</View>
<Divider
style={{
backgroundColor: 'lightgrey',
marginHorizontal: 5,
height: 2,
}}
/>
<View style={{ flex: 5 }}>
{this.state.selectedIndex == 0 ? (
<ScrollView>{this.all_medicine()}</ScrollView>
) : (
<Text>test</Text>
)}
</View>
</View>
);
}
}
- 至少在 App.js 中,由于您的 RootStack 堆栈,我将 carte 选项卡的名称从 Cart 更改为 Carte。李>
export default createAppContainer(
createBottomTabNavigator(
{
Home: {
screen: Home,
navigationOptions: {
tabBarLabel: 'Home',
tabBarIcon: ({ tintColor }) => (
<Ionicons name={'ios-home'} size={25} color={tintColor} />
),
},
},
Medicin: {
screen: Medicin,
navigationOptions: {
tabBarLabel: 'Medicin',
tabBarIcon: ({ tintColor }) => (
<Image
source={require('./assets/images/Dashboard/drawable-xhdpi/doctor_heart.png')}
style={{ width: 25, height: 20, tintColor: tintColor }}
/>
),
},
},
Carte: {
screen: Carte,
navigationOptions: {
tabBarLabel: 'Carte',
tabBarIcon: ({ tintColor }) => (
<Ionicons name={'ios-map'} size={25} color={tintColor} />
),
},
},
},
{
tabBarOptions: {
activeTintColor: 'black',
inactiveTintColor: 'gray',
},
}
)
);
我对此进行了测试,它对我有用。