我正在尝试使用不同的类别过滤器创建新闻应用。为了做到这一点,我必须在我的导航器中将道具传递到不同的屏幕,以便组件可以使用fetch的道具。例如:
export default createMaterialTopTabNavigator({
Home: {
screen: HomeScreen,
navigationOptions:{
tabBarLabel: "Home",
},
props: {id: 1}
},
BeautyScreen: {
screen: HomeScreen,
navigationOptions:{
tabBarLabel: "Beauty tips",
},
props: {id: 2}
},
BusinessScreen: {
screen: HomeScreen,
navigationOptions:{
tabBarLabel: "Business related",
},
props: {id: 3}
},
CarsScreen: {
screen: HomeScreen,
navigationOptions:{
tabBarLabel: "Cars related",
},
props: {id: 4}
},
)}
正如你所看到的,我可以使用相同的HomeScreen
组件与不同的道具,我可以传递api例如:fetch("https://some-api.com/?category=" + navigations.props.id)
。
这就是我现在所拥有的,我必须为不同的屏幕创建不同的组件,因为基本上相同的组件具有不同的api。
export default createMaterialTopTabNavigator({
Home: {
screen: HomeScreen,
navigationOptions:{
tabBarLabel: "Home",
}
},
BeautyScreen: {
screen: BeautyScreen,
navigationOptions:{
tabBarLabel: "Beauty tips",
}
},
BusinessScreen: {
screen: BusinessScreen,
navigationOptions:{
tabBarLabel: "Business related",
}
},
CarsScreen: {
screen: CarsScreen,
navigationOptions:{
tabBarLabel: "Cars related",
}
},
我刚刚发现react navigation v3支持这一点
BeautyScreen: {
screen: OtherCategoriesScreens,
navigationOptions:{
tabBarLabel: "Beauty",
},
params: {
categories: [
{
name: "Fashion",
id: 144,
},
{
name: "Make up",
id: 143,
},
]
}
},
然后你可以在屏幕组件中使用this.props.navigation.getParam('categories')
来获取Param。