Question

我正在尝试将一些行数据从列表传递到下一个屏幕以显示详细信息但似乎无法实现。这就是我在导航时传递道具的方式：

_renderRow(row,sectionId, rowId, highlightRow) {
      var self = this;
      let navigate=this.props.navigation;
               return (
            <TouchableOpacity onPress={() => navigate('ChatList',{row})}>
            
........//ignored code

在另一个屏幕上ChatList.js：

import React, { Component } from 'react';
import {
  StyleSheet,
  Text,
  View,
  TouchableOpacity,
  TextInput,
  Image
} from 'react-native';

import { StackNavigator } from 'react-navigation';


const ChatList = ()  => {

  return (    
    <View>
    </View>
  );
}

ChatList.navigationOptions = {
//trying to set the title from the data sent around here
  title: 'ChatList Title',
  headerStyle: {
            backgroundColor: '#2196F3',
        },
  headerTitleStyle: {
      color: 'white',
  },
  headerBackTitleStyle: {
      color: 'white',
  },
  headerTintColor: 'white',
};


export default ChatList

另外需要注意的是，与docs from reactnavigation不同，我在stacknavigation上有不同的实现。请在此处查看我的整个实现https://gist.github.com/SteveKamau72/f04b0a3dca03a87d604fe73767941bf2

以下是_renderRow所在的完整类：

ChatGroup.js

/** ChatGroup.js**/ 
//This code is component for file App.js to display group of chats 
 
import React, { Component } from 'react'; 
import { 
  StyleSheet, 
  ListView, 
  Text, 
  View, 
  Image, 
  TouchableOpacity 
} from 'react-native'; 
 
const data = [ 
    { 
        name: "Kasarini", 
        last_chat: { 
            updated_at:"22:13", 
            updated_by: "Steve Kamau", 
            chat_message: "Lorem Ipsum is pretty awesome if you know it" 
        }, 
        thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg" 
 
    }, 
    { 
        name: "Kabete", 
        last_chat: { 
            updated_at:"20:34", 
            updated_by: "Tim Mwirabua", 
            chat_message: "Lorem Ipsum is pretty awesome if you know it" 
        }, 
        thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg" 
 
    }, 
    { 
        name: "Kiambuu", 
        last_chat: { 
            updated_at:"19:22", 
            updated_by: "Maureen Chubi", 
            chat_message: "Lorem Ipsum is pretty awesome if you know it" 
        }, 
        thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg" 
 
    }, 
    { 
        name: "UnderPass", 
        last_chat: { 
            updated_at:"17:46", 
            updated_by: "Faith Chela", 
            chat_message: "Lorem Ipsum is pretty awesome if you know it" 
        }, 
        thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg" 
 
    }, 
] 
 
export default class UserListView extends Component { 
    constructor() { 
        super(); 
        const ds = new ListView.DataSource({rowHasChanged: this._rowHasChanged}); 
 
        this.state = { 
            dataSource: ds.cloneWithRows(data) 
        } 
    } 
    render() { 
        return ( 
            <ListView
                dataSource={this.state.dataSource}
                renderRow={this._renderRow.bind(this)}
                enableEmptySections={true} />
        ) 
    } 
 
    _renderRow(row,sectionId, rowId, highlightRow) { 
      var self = this; 
        return ( 
            <TouchableOpacity activeOpacity={0.9} onPress={() => navigate('ChatList',{ user: 'Lucy' })}>
                <View style={styles.container}> 
                   <Image 
                          style={styles.groupChatThumbnail} 
                          source={{uri: row.thumbnail}}/> 
                   <View> 
                        <View style={{flexDirection:'row', justifyContent:'space-between', width:280}}> 
                                <Text style={styles.groupNameText}>{row.name} </Text> 
                                <Text style={styles.groupUpdatedAtText}>{row.last_chat.updated_at}</Text> 
 
                        </View> 
                        <View style={{ flexDirection:'row', alignItems:'center', marginTop: 5}}> 
                                <Text style={styles.groupUpdatedByText}>{row.last_chat.updated_by} : </Text>    
                                <View style={{flex: 1}}> 
                                        <Text ellipsizeMode='tail' numberOfLines={1}style={styles.groupChatMessageText}>{row.last_chat.chat_message} </Text>  
                                </View> 
                        </View> 
                  </View> 
                        
                
                </View> 
            </TouchableOpacity> 
        ) 
    } 
 
    _rowHasChanged(r1, r2) { 
        return r1 !== r2 
    } 
 
 
         highlightRow() { 
    alert('Hi!'); 
  } 
 
} 
 
const styles = StyleSheet.create({ 
  container:{ 
        alignItems:'center',  
        padding:10,  
        flexDirection:'row',  
        borderBottomWidth:1,  
        borderColor:'#f7f7f7', 
        backgroundColor: '#fff' 
      }, 
      groupChatContainer:{ 
        display: 'flex', 
        flexDirection: 'row', 
        
      }, 
      groupNameText:{ 
        marginLeft:15,  
        fontWeight:'600',  
        marginTop: -8, 
        color: '#000' 
      }, 
      groupUpdatedAtText :{ 
        color:'#333', fontSize:10, marginTop: -5 
      }, 
      groupChatThumbnail:{ 
       borderRadius: 30,  
       width: 50,  
       height: 50 , 
       alignItems:'center' 
      }, 
      groupUpdatedByText:{ 
        fontWeight:'400', color:'#333', 
        marginLeft:15, marginRight:5 
      }, 
 
});

Answer 1

在第二个屏幕上有两种访问导航道具的方法：

内部喜欢

navigationOptions = ({navigation}) => ({title:`${navigation.state.params.name}`});

如果您在内部访问任何方法，如渲染等
```
{user}= this.props.navigation.state.params
```

ChatList.navigationOptions这可以写成

ChatList.navigationOptions= ({navigation}) => ({// props access here });

和const ChatList = ()内写this.props.navigation.state.params

React Native：如何将道具从一个屏幕导航到另一个屏幕

1 个答案: