[英]react-native , customer flatlist picker, returning previous values on selection
[英]React-Native: Passing data through a FlatList Selection
我目前正在尝试通过箭头功能传递信息,当用户在平面列表中选择一行时会调用该功能。 但是,我似乎无法弄清楚如何将数据适当地传递到下一个屏幕。
我当前的实现如下所示:
import ...
class ViewFollowingScreen extends Component {
constructor(props) {
super(props);
this.state = {
loading: false,
allUsers: [],
data: [],
page: 1,
seed: 1,
error: null,
refreshing: false
}
}
static navigationOptions = {...};
searchUsers(searchBarText) {...};
_onPressItem = () => {
/**
HOW DO YOU PASS THE INFORMATION OF THE SELECTED USER TO THE ViewUser SCREEN??
**/
this.props.navigation.navigate('ViewUser')//Needs to include user information
};
componentDidMount() {...};
makeRemoteRequest = () => {...};
renderSeparator = () => {...};
renderHeader = () => {...};
renderFooter = () => {...};
_renderItem = ({item}) => (
<TouchableOpacity onPress={this._onPressItem}>
<ListItem
roundAvatar
title={`${item.name.first[0].toUpperCase() + item.name.first.substr(1,item.name.first.length)} ${item.name.last[0].toUpperCase() + item.name.last.substr(1,item.name.last.length)}`}
subtitle={'Followers: 15' }
avatar={{ uri: item.picture.thumbnail }}
containerStyle={{borderBottomWidth: 0}}
/>
</TouchableOpacity>
);
render() {
return (
<ViewContainer>
<List containerStyle={{borderBottomWidth: 0, borderTopWidth: 0}}>
<FlatList
data={this.state.data}
renderItem={this._renderItem}
keyExtractor={(item) => item.email}
ItemSeparatorComponent={this.renderSeparator}
ListHeaderComponent={this.renderHeader}
ListFooterComponent={this.renderFooter}
/>
</List>
</ViewContainer>
);
}
}
module.exports = ViewFollowingScreen;
当前,当用户在平面列表中选择一行时,我可以导航到下一个屏幕,但是似乎无法弄清楚如何在两者之间传递适当的数据。
如果您需要其他任何信息,请告诉我。我很乐意相应地编辑我的问题
任何帮助, 不胜感激!
导航到下一个屏幕时,可以通过参数发送用户信息。 在onPressItem函数内部,进行如下编辑:
_onPressItem = () => {
this.props.navigation.navigate('ViewUser',{
user: user // your user details
})
};
然后您可以在下一个屏幕上通过
this.props.navigation.state.params.user
编辑:
将_renderItem
函数更改为此:
_renderItem = ({item}) => (
<TouchableOpacity onPress={()=>{this._onPressItem(item)}}>
<ListItem
roundAvatar
title={`${item.name.first[0].toUpperCase() + item.name.first.substr(1,item.name.first.length)} ${item.name.last[0].toUpperCase() + item.name.last.substr(1,item.name.last.length)}`}
subtitle={'Followers: 15' }
avatar={{ uri: item.picture.thumbnail }}
containerStyle={{borderBottomWidth: 0}}
/>
</TouchableOpacity>
)
和onPressItem
:
_onPressItem = (user) => {
this.props.navigation.navigate('ViewUser',{
user: user //your user details
})
};
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