ReactNative Flatlist onEndReached不起作用

Question

我试图调用onEndReachedFlatList 的函数,但它不起作用.

我在最后打电话给this.state.pageNo它,但它没有更新.我想稍后在无限滚动中使用这个逻辑,但现在无法使它工作.

 import React, { Component } from "react";
 import {
  View,
  Text,
  StyleSheet,
  Button,
  TouchableOpacity,
  FlatList,
  Alert
  } from "react-native";

 class InfiniteScrollRedux extends Component {
   constructor(props) {
      super(props);
      this.state = {
        loading: false,
        pageNo: 1,
        data: [
            { id: 1, name: "Name01" },
            { id: 2, name: "Name02" },
            { id: 3, name: "Name03" },
            { id: 4, name: "Name04" },
            { id: 5, name: "Name05" },
            { id: 6, name: "Name06" }
        ]
    };
}

myFunction = () => {
    this.setState({ pageNo: this.state.pageNo++ });
};

render() {
    return (
        <View>
            <FlatList
                data={this.state.data}
                renderItem={({ item }) => (
                    <View style={mystyle.mainCard}>
                        <Text style={mystyle.titleText}> {item.id} </Text>
                        <View style={{ marginTop: 200 }} />
                        <Text style={mystyle.nameText}> {item.name} </Text>
                    </View>
                )}
                keyExtractor={item => item.id}
                onEndReached={this.myFunction}
                onEndThreshold={0}
            />
            <Text style={{ margin: 20, padding: 20, fontSize: 20 }}>
                {this.state.pageNo}
            </Text>
        </View>
      );
   }
}

const mystyle = StyleSheet.create({
 mainCard: {
    backgroundColor: "#2F4F4F",
    marginBottom: 1,
    padding: 5
},
titleText: {
    fontSize: 20,
    color: "#F0FFFF"
},
nameText: {
    fontSize: 14,
    color: "#F0FFFF"
 }
 });

 export default InfiniteScrollRedux;

Answer 1

就我而言，问题出在nativebase上<Content>。在<FlatList>内部使用时会产生问题。解决方案：

<Content
  style={{flex: 1}}
  contentContainerStyle={{flex: 1}} // important!
>

来源：https : //github.com/GeekyAnts/NativeBase/issues/1736

Answer 2

这里有一个问题:https://github.com/facebook/react-native/issues/14312.看起来很多人都在经历同样的事情.有人建议将onEndReachedThresholdto值更大为0,例如:0.3.

Answer 3

您在 FlatList 中查找的属性是onEndReachedThreshold而不是 onEndThreshold。