React Native 列表自定义下拉刷新

        关于React Native List的下拉刷新,虽然官方出了一个控件RefreshControl,但可定制性太差,基本上样式固定了。为了满足项目需求,我在GitHub上搜到了这个组件,使用起来非常不错。

        同时支持android和ios,并且拥有相同的Api,可以自定义下拉刷新样式;它里面已经实现了View,Scrollview,Listview和Flatlist的下拉刷新,可以支持绝大多数的React Native中的组件实现下拉刷新功能。

安装

        yarn add react-native-rk-pull-to-redresh

如果link失败就需要手动link

        react-native link react-native-rk-pull-to-refresh

使用提醒

        它内部包含了PullView、PullScrollView,、PullListView和PullFlatList,如果你想使用PullFlatList的话,那么你要保持你的React Native版本在0.43及以上。并且你要添加如下的代码到FlatList(node_modules/react-native/Libraries/Lists/FlatList.js)中:

...
getScrollMetrics = () => {
    return this._listRef.getScrollMetrics()
}

...

        同时在VirtualizedList(node_modules/react-native/Libraries/Lists/VirtualizedList.js)中添加如下代码:

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...
 getScrollMetrics = () => {
    return this._scrollMetrics
 }

 ...

属性

Porp Type Optional Default Description
refreshable bool yes true 是否需要下拉刷新功能
isContentScroll bool yes false 在下拉的时候内容时候要一起跟着滚动
onPullRelease func yes   刷新的回调
topIndicatorRender func yes   下拉刷新头部的样式,当它为空的时候就使用默认的
topIndicatorHeight number yes   下拉刷新头部的高度,当topIndicatorRender不为空的时候要设置正确的topIndicatorHeight
onPullStateChangeHeight func yes   下拉时候的回调,主要是刷新的状态的下拉的距离
onPushing func yes   下拉时候的回调,告诉外界此时是否在下拉刷新

        startRefresh():手动调用下拉刷新功能 

        finishRefresh():结束下拉刷新

使用样例

PullListView默认样式

import React, {PureComponent} from 'react';
import {ListView, View, Text, Dimensions} from 'react-native';
import {PullListView} from 'react-native-rk-pull-to-refresh'

const width = Dimensions.get('window').width

export default class PullListViewDemo extends PureComponent {

    constructor(props) {
        super(props);
        this.dataSource =
            new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2}).cloneWithRows(this.getDataSource())
    }

    getDataSource = () => {
        let array = new Array();
        for (let i = 0; i < 50; i++) {
            array.push(`ListViewItem:${i + 1}`);
        }
        return array;
    }

    render() {
        return (
            <PullListView
                ref={(c) => this.pull = c}
                isContentScroll={true}
                style={{flex: 1, width: width}}
                onPushing={this.props.onPushing}
                onPullRelease={this._onPullRelease}
                dataSource={this.dataSource}
                renderRow={this._renderRow}/>
        )
    }

    _onPullRelease = () => {
        setTimeout(() => {
            this.pull && this.pull.finishRefresh()
        }, 2000)
    }

    _renderRow = (rowData) => {
        return (
            <View style={{width: width, height: 50, justifyContent: 'center', alignItems: 'center'}}>
                <Text>{rowData}</Text>
            </View>);
    }

    componentDidMount() {
        this.pull && this.pull.startRefresh()
    }

}

PullView自定义样式

import React, {PureComponent} from 'react';

import {View, Text, Dimensions, StyleSheet, ActivityIndicator} from 'react-native';

import {PullView} from 'react-native-rk-pull-to-refresh'


const width = Dimensions.get('window').width
const topIndicatorHeight = 50

export default class PullViewDemo extends PureComponent {
    render() {
        return (
            <PullView
                ref={(c) => this.pull = c}
                style={{flex: 1, width: width}}
                topIndicatorRender={this.topIndicatorRender}
                topIndicatorHeight={topIndicatorHeight}
                onPullStateChangeHeight={this.onPullStateChangeHeight}
                onPushing={this.props.onPushing}
                onPullRelease={this._onPullRelease}>
                <Text style={{flex: 1, width: width, paddingTop: 200, textAlign: 'center'}}>这是内容</Text>
            </PullView>
        )
    }

    onPullStateChangeHeight = (pullState, moveHeight) => {
        if (pullState == 'pulling') {
            this.txtPulling && this.txtPulling.setNativeProps({style: styles.show});
            this.txtPullok && this.txtPullok.setNativeProps({style: styles.hide});
            this.txtPullrelease && this.txtPullrelease.setNativeProps({style: styles.hide});
        } else if (pullState == 'pullok') {
            this.txtPulling && this.txtPulling.setNativeProps({style: styles.hide});
            this.txtPullok && this.txtPullok.setNativeProps({style: styles.show});
            this.txtPullrelease && this.txtPullrelease.setNativeProps({style: styles.hide});
        } else if (pullState == 'pullrelease') {
            this.txtPulling && this.txtPulling.setNativeProps({style: styles.hide});
            this.txtPullok && this.txtPullok.setNativeProps({style: styles.hide});
            this.txtPullrelease && this.txtPullrelease.setNativeProps({style: styles.show});
        }
    }

    topIndicatorRender = () => {
        return (
            <View style={{flexDirection: 'row', justifyContent: 'center', alignItems: 'center', height: topIndicatorHeight}}>
                <ActivityIndicator size="small" color="gray" style={{marginRight: 5}}/>
                <Text ref={(c) => this.txtPulling = c} style={styles.hide}>pulling...</Text>
                <Text ref={(c) => this.txtPullok = c} style={styles.hide}>pullok...</Text>
                <Text ref={(c) => this.txtPullrelease = c} style={styles.hide}>pullrelease...</Text>
            </View>
        );
    }

    _onPullRelease = () => {
        setTimeout(() => {
            this.pull && this.pull.finishRefresh()
        }, 2000)
    }

    componentDidMount() {
        this.pull && this.pull.startRefresh()
    }
}

const styles = StyleSheet.create({
    hide: {
        position: 'absolute',
        left: 10000,
        backgroundColor: 'transparent'
    },
    show: {
        position: 'relative',
        left: 0,
        backgroundColor: 'transparent'
    }

});


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转载自blog.csdn.net/zhangkui0418/article/details/80966254