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如何安装tracker（封装Picker组件）
如何安装tracker（封装Picker组件）
2024-09-29 03:49:07  作者:囬忆好美  网址:https://m.xinb2b.cn/sport/bxv207939.html

import { View, Text, TouchableWithoutFeedback, TouchableOpacity, FlatList,} from 'react-native'import React,{ PureComponent, Component,} from 'react'import _ from 'lodash'import styleSheet, {getThemeColor} from '../utils/styleSheet'import {Callback} from "modern/types/lang";import Modal from './Modal'import {getScreenHeight, getScreenWidth} from "modern/consts/ui-common";const styles = styleSheet.create({ container:{ flex:1, backgroundColor: 0x00000074, alignItems: 'center', justifyContent: 'flex-end', }, contentView:{ flexDirection:'row', justifyContent: 'space-around', backgroundColor: 'white' }, stage:{ top:0, bottom:0, left:0, right:0, position:'absolute', zIndex:10, flexDirection:'row', justifyContent: 'space-around', }, maskView:{ left:0, right:0, position:'absolute', top:0, bottom:0, zIndex:0, justifyContent:'space-between' }, emptyView:{ height:50, flexDirection:'row', justifyContent:'space-between', paddingHorizontal:20, backgroundColor: 'white', }, maskStyle:{ width:'100%', // backgroundColor:'rgba(232,232,232,0.9)', borderColor:"rgba(232,232,232,0.9)", backgroundColor:'white' }, midMaskStyle:{ backgroundColor:'#f9f9f9' }, headerBtnView:{ height:50,justifyContent: 'center' }, cancelText:{ fontSize:16,color:'gray' }})function DefaultView (){ return ( <View style={{flex:1,justifyContent:'center',alignItems: 'center'}}> <Text>暂无数据</Text> </View> )}interface ISHeadProps { customHead:any, confirm:Callback, hide:Callback, headOptions:any}const Head:React.FC<ISHeadProps> = React.memo(({customHead,confirm,hide,headOptions})=>{ if(customHead && _.isFunction(customHead)){ return customHead(confirm,hide) } const { cancelTextStyle={}, cancelBtnView={}, confirmBtnView={}, confirmTextStyle={}, leftText='取消', rightText='确定', headerContainView={}, } = headOptions return <View style={[styles.emptyView,headerContainView]}> <TouchableOpacity style={[styles.headerBtnView,cancelBtnView]} onPress={hide}> <Text style={[styles.cancelText,cancelTextStyle]}>{leftText}</Text> </TouchableOpacity> <TouchableOpacity onPress={confirm} style={[styles.headerBtnView,confirmBtnView]}> <Text style={[{color:getThemeColor(),fontSize:16},confirmTextStyle]}>{rightText}</Text> </TouchableOpacity> </View>})interface ISEmpty { hide:Callback}const Empty:React.FC<ISEmpty> = React.memo(({hide})=>{ return <TouchableWithoutFeedback onPress={hide}> <View style={{flex:1,width:getScreenWidth()}} /> </TouchableWithoutFeedback>})interface ISMaskView { maxLength:number, itemHeihght:number, maskOptions:any,}const MaskView:React.FC<ISMaskView> = React.memo(({maxLength,itemHeihght,maskOptions={}})=>{ const { upMaskView, bottomMaskView, midMaskView } = maskOptions const mid = Math.floor(maxLength/2) return <View style={[styles.maskView]}> <View style={[styles.maskStyle,{height:itemHeihght*mid,borderBottomWidth:0.5,},upMaskView]}/> <View style={[styles.midMaskStyle,{height:itemHeihght},midMaskView]} /> <View style={[styles.maskStyle,{height:itemHeihght*mid,borderTopWidth:0.5,},bottomMaskView]}/> </View>})interface ISourceType { id:string, name:string, sub?:ISourceType[] [propname:string]:any,}interface ISitemOptons { itemHeihght?:number, maxLength?:5 | 7 | 9, ActiveTextStyle?:any, normalTextStyle?:any,}interface ISProps { sourceData:ISourceType[], cancel?:Callback, confirm:Callback, selectData:ISourceType[], pickerType:'scroll' | 'click' | 'all', customHead:any, headOptions:any, maskOptions:any, itemOptons:ISitemOptons, isLinkage:boolean, renderListEmptyComponent:Callback, emptyOptions:any, wrapOptions:any, EmptyView:any}interface ISState { visible:boolean, floor:number,}function WithHeadAndMethod(WrapComponent:any){ return class PickerAlertView extends PureComponent<ISProps,ISState>{ public selectedData:ISourceType[] =[] public static defaultProps = { itemOptons:{}, selectData:[], headOptions:{}, pickerType:'all', maskOptions:{}, isLinkage:false, emptyOptions:{}, wrapOptions:{ stageView:{} } } constructor(props:ISProps) { super(props); this.state = { visible:false, floor:this.getMaxFloor(), } } public getMaxFloor = ()=>{ const { sourceData,isLinkage } = this.props if(_.isEmpty(sourceData)) return 0 if(isLinkage) return sourceData.length let floor:number = 1 function treeData(arr:any){ const sub:any = arr.find((item:any)=>item?.sub?.length > 0) if(sub){ floor = floor 1 let arr2:any = [] arr.forEach((item:any)=>{ if(item?.sub?.length>0){ arr2 = arr2.concat(item.sub) } }) treeData(arr2) } } treeData(sourceData) return floor } public show = ()=>{ this.setState({visible:true}) } public confirm = ()=>{ const { confirm=_.noop } = this.props this.hide() confirm(this.selectedData) } public hide = ()=>{ const { cancel=_.noop } = this.props cancel() this.setState({visible:false}) } public getSelected = ()=>this.selectedData private setSelected = (item:ISourceType,floor:number)=>{ this.selectedData[floor] = item } public componentDidUpdate(preProps,prevState,snapshot){ if(!_.isEqual(this.props.sourceData,preProps.sourceData)){ this.setState({ floor:this.getMaxFloor() }) } } public render(){ const { visible, floor, } = this.state const { selectData, sourceData, pickerType, customHead, headOptions, maskOptions, itemOptons, isLinkage, renderListEmptyComponent, emptyOptions, wrapOptions, EmptyView = DefaultView } = this.props const { stageView } = wrapOptions if(!visible) return null const { maxLength=9, itemHeihght=50, ActiveTextStyle={}, normalTextStyle={} } = itemOptons return ( <Modal visible={visible} animationType="slide" transparent={true} > <View style={styles.container} > <Empty hide={this.hide}/> <View style={{ width:getScreenWidth()}}> <Head headOptions={headOptions} hide={this.hide} confirm={this.confirm} customHead={customHead} /> <View style={[{height:itemHeihght*maxLength},styles.contentView]}> <View style={[styles.stage,stageView]}>{ _.isEmpty(sourceData) ?<EmptyView/>: <WrapComponent sourceList={sourceData} setSelect={this.setSelected} floor={floor} currentFloor={0} maxLength={maxLength} defaultSelected = {selectData} itemHeihght={itemHeihght} ActiveTextStyle={ActiveTextStyle} normalTextStyle={normalTextStyle} pickerType={pickerType} originData={sourceData} isLinkage={isLinkage} renderListEmptyComponent={renderListEmptyComponent} emptyOptions={emptyOptions} />} </View> <MaskViewmaxLength={maxLength}itemHeihght={itemHeihght}maskOptions={maskOptions} /> </View> </View> </View> </Modal> ) } }}interface ISItemProps { sourceList:ISourceType[], setSelect:Callback, floor:number, currentFloor:number, maxLength: 5 | 7 | 9, defaultSelected:ISourceType[], itemHeihght:number, ActiveTextStyle:any, normalTextStyle:any, pickerType:string, isLinkage:boolean, originData:any, renderListEmptyComponent:Callback, emptyOptions:any}interface ISItemState { nextData:ISourceType[], currentChoose:ISourceType, initialScrollIndex:number, renderList:any[], surerefresh:any}class PickerAlertViewItem extends PureComponent<ISItemProps,ISItemState> { public scrollView:any public flatEl:any public currentItem:any public itemEL:any public config:any = { waitForInteraction: false, itemVisiblePercentThreshold:100, } public constructor(props:ISItemProps) { super(props); this.state = { nextData:this.defaultRenderList(), currentChoose:this.getDefaultChoose(), initialScrollIndex:this.getInitialScrollIndex(), renderList:this.flatListData(), surerefresh:null, } } public getInitialScrollIndex = ()=>{ const {defaultSelected,currentFloor,sourceList } = this.props if(_.isEmpty(defaultSelected)) return 0 const initIndex = sourceList.findIndex(item=>String(item.id) === String(defaultSelected[currentFloor]?.id)) return initIndex<0?0:initIndex } public defaultRenderList = ()=>{ const { currentFloor, floor, defaultSelected, sourceList,isLinkage,originData} = this.props if(isLinkage){ return originData[currentFloor 1] } const getNoFefault = ()=>this.props.sourceList?.[0]?.sub || [] const getDefaultList = ()=>{ if(currentFloor 1 === floor ) return [] return sourceList.find(value=>value.id === defaultSelected[currentFloor].id)?.sub || getNoFefault() } return _.isEmpty(defaultSelected)?getNoFefault():getDefaultList() } public getDefaultChoose = ()=>{ const { defaultSelected, currentFloor, sourceList } = this.props return _.isEmpty(defaultSelected)?sourceList?.[0]:(sourceList.find(item=>item.id === defaultSelected?.[currentFloor]?.id) || sourceList?.[0]) } public mid = ()=>{ const { maxLength } = this.props return Math.floor(maxLength/2) } public flatListData = (nextData:any[])=>{ const { sourceList,currentFloor,originData ,isLinkage} = this.props const mid = this.mid() const arr = Array(mid).fill({id:'',name:'',sub:[]}) let currentData = nextData?nextData:sourceList if(isLinkage){ currentData = originData[currentFloor] } if(currentData.length === 0 || !currentData) return [] return [...arr,...currentData,...arr] } public getItemLayout = (data:any,index:any) =>{ const { itemHeihght } = this.props return {length: itemHeihght, offset: itemHeihght * index, index} } public renderItem = ({item,index,separators}:any)=>{ const { itemHeihght ,ActiveTextStyle,normalTextStyle,pickerType} = this.props const {currentChoose} = this.state const itemPress = (pickerType === 'scroll' || item.id === currentChoose?.id)?_.noop:this.clickItem return <TouchableWithoutFeedback onPress={()=>itemPress(item,index)}> <Text numberOfLines={1} style={[ {height:itemHeihght,textAlign:'center',lineHeight:itemHeihght,opacity:0.8,paddingHorizontal: 10, }, item.id === currentChoose?.id?ActiveTextStyle:normalTextStyle ]} >{item.name}</Text> </TouchableWithoutFeedback> } public clickItem =(item:ISourceType,index:any)=>{ const mid = this.mid() if(index<mid) return if(!item) return this.scrollToIndex(index) this.chooseItem(index,item) } public scrollToIndex = (index:any)=>{ const { renderList } = this.state if(renderList.length === 0 || !renderList) return if(this.flatEl){ this.flatEl.scrollToIndex({ index, viewPosition:0.5, animated:true }) } } public chooseItem = (index:number,item:ISourceType)=>{ const { setSelect,currentFloor,isLinkage } = this.props setSelect(item,currentFloor) if(isLinkage) return this.setState({ currentChoose:item || {}, nextData:item?.sub || [] },()=>{ if(this.itemEL) this.itemEL.reduction() }) } public reduction=()=>{ const currentChoose = this.props.sourceList?.[0] || {} const nextData = currentChoose?.sub || [] const mid = this.mid() this.setState({ currentChoose, nextData, renderList:this.flatListData(), surerefresh:Date.now() Math.random(), }) } public componentDidMount(){ this.initSelected() } public componentDidUpdate(preProp:ISItemProps,preState:ISItemState){ const mid = this.mid() if(this.state.surerefresh !== preState.surerefresh){ _.delay(()=>this.clickItem(this.state.currentChoose,mid),100) } } public initSelected = ()=>{ const {setSelect,currentFloor } = this.props const { currentChoose } = this.state setSelect(currentChoose,currentFloor) if(this.flatEl) this.flatEl.recordInteraction() } public renderListEmptyComponent = (data:any)=>{ const {renderListEmptyComponent,itemHeihght,emptyOptions,maxLength} = this.props if(renderListEmptyComponent) return renderListEmptyComponent() return <View style={{height:itemHeihght*maxLength,justifyContent:'center',alignItems: 'center'}}> <Text numberOfLines={1} style={[ { height:itemHeihght, textAlign:'center', lineHeight:itemHeihght, opacity:0.8, paddingHorizontal: 10, } ]} >{emptyOptions.descText || '暂无数据'}</Text> </View> } public render(){ const { floor, currentFloor, setSelect, defaultSelected, maxLength, itemHeihght=50, ActiveTextStyle, normalTextStyle, pickerType, isLinkage, originData, emptyOptions, } = this.props const { nextData, initialScrollIndex, renderList, } = this.state const nextFloor = currentFloor 1 return ( <> <FlatList style={{flex:1}} ref={ref=>this.flatEl = ref} showsHorizontalScrollIndicator={false} showsVerticalScrollIndicator={false} keyExtractor={(item: object, index: number) => String(index)} renderItem={this.renderItem} viewabilityConfig={this.config} data={renderList} getItemLayout={this.getItemLayout} initialScrollIndex={initialScrollIndex} onMomentumScrollEnd={this._moveEnd} scrollEnabled={pickerType === 'click'?false:true} ListEmptyComponent={this.renderListEmptyComponent} /> { floor > nextFloor ? <PickerAlertViewItem ref={ref=>this.itemEL = ref} sourceList={nextData} floor={floor} setSelect={setSelect} currentFloor={nextFloor} defaultSelected={defaultSelected} maxLength={maxLength} itemHeihght={itemHeihght} ActiveTextStyle={ActiveTextStyle} normalTextStyle={normalTextStyle} pickerType={pickerType} isLinkage={isLinkage} originData={originData} emptyOptions={emptyOptions} />: null } </> ) } private _moveEnd=(e)=>{ const {itemHeihght} = this.props const { renderList } = this.state const contentOffset = e.nativeEvent.contentOffset.y; const mid = this.mid() const index = Math.round(contentOffset/itemHeihght) mid this.clickItem(renderList[index],index) }}export default WithHeadAndMethod(PickerAlertViewItem)，今天小编就来说说关于如何安装tracker?下面更多详细答案一起来看看吧!


如何安装tracker

import { View, Text, TouchableWithoutFeedback, TouchableOpacity, FlatList,} from 'react-native'import React,{ PureComponent, Component,} from 'react'import _ from 'lodash'import styleSheet, {getThemeColor} from '../utils/styleSheet'import {Callback} from "modern/types/lang";import Modal from './Modal'import {getScreenHeight, getScreenWidth} from "modern/consts/ui-common";const styles = styleSheet.create({ container:{ flex:1, backgroundColor: 0x00000074, alignItems: 'center', justifyContent: 'flex-end', }, contentView:{ flexDirection:'row', justifyContent: 'space-around', backgroundColor: 'white' }, stage:{ top:0, bottom:0, left:0, right:0, position:'absolute', zIndex:10, flexDirection:'row', justifyContent: 'space-around', }, maskView:{ left:0, right:0, position:'absolute', top:0, bottom:0, zIndex:0, justifyContent:'space-between' }, emptyView:{ height:50, flexDirection:'row', justifyContent:'space-between', paddingHorizontal:20, backgroundColor: 'white', }, maskStyle:{ width:'100%', // backgroundColor:'rgba(232,232,232,0.9)', borderColor:"rgba(232,232,232,0.9)", backgroundColor:'white' }, midMaskStyle:{ backgroundColor:'#f9f9f9' }, headerBtnView:{ height:50,justifyContent: 'center' }, cancelText:{ fontSize:16,color:'gray' }})function DefaultView (){ return ( <View style={{flex:1,justifyContent:'center',alignItems: 'center'}}> <Text>暂无数据</Text> </View> )}interface ISHeadProps { customHead:any, confirm:Callback, hide:Callback, headOptions:any}const Head:React.FC<ISHeadProps> = React.memo(({customHead,confirm,hide,headOptions})=>{ if(customHead && _.isFunction(customHead)){ return customHead(confirm,hide) } const { cancelTextStyle={}, cancelBtnView={}, confirmBtnView={}, confirmTextStyle={}, leftText='取消', rightText='确定', headerContainView={}, } = headOptions return <View style={[styles.emptyView,headerContainView]}> <TouchableOpacity style={[styles.headerBtnView,cancelBtnView]} onPress={hide}> <Text style={[styles.cancelText,cancelTextStyle]}>{leftText}</Text> </TouchableOpacity> <TouchableOpacity onPress={confirm} style={[styles.headerBtnView,confirmBtnView]}> <Text style={[{color:getThemeColor(),fontSize:16},confirmTextStyle]}>{rightText}</Text> </TouchableOpacity> </View>})interface ISEmpty { hide:Callback}const Empty:React.FC<ISEmpty> = React.memo(({hide})=>{ return <TouchableWithoutFeedback onPress={hide}> <View style={{flex:1,width:getScreenWidth()}} /> </TouchableWithoutFeedback>})interface ISMaskView { maxLength:number, itemHeihght:number, maskOptions:any,}const MaskView:React.FC<ISMaskView> = React.memo(({maxLength,itemHeihght,maskOptions={}})=>{ const { upMaskView, bottomMaskView, midMaskView } = maskOptions const mid = Math.floor(maxLength/2) return <View style={[styles.maskView]}> <View style={[styles.maskStyle,{height:itemHeihght*mid,borderBottomWidth:0.5,},upMaskView]}/> <View style={[styles.midMaskStyle,{height:itemHeihght},midMaskView]} /> <View style={[styles.maskStyle,{height:itemHeihght*mid,borderTopWidth:0.5,},bottomMaskView]}/> </View>})interface ISourceType { id:string, name:string, sub?:ISourceType[] [propname:string]:any,}interface ISitemOptons { itemHeihght?:number, maxLength?:5 | 7 | 9, ActiveTextStyle?:any, normalTextStyle?:any,}interface ISProps { sourceData:ISourceType[], cancel?:Callback, confirm:Callback, selectData:ISourceType[], pickerType:'scroll' | 'click' | 'all', customHead:any, headOptions:any, maskOptions:any, itemOptons:ISitemOptons, isLinkage:boolean, renderListEmptyComponent:Callback, emptyOptions:any, wrapOptions:any, EmptyView:any}interface ISState { visible:boolean, floor:number,}function WithHeadAndMethod(WrapComponent:any){ return class PickerAlertView extends PureComponent<ISProps,ISState>{ public selectedData:ISourceType[] =[] public static defaultProps = { itemOptons:{}, selectData:[], headOptions:{}, pickerType:'all', maskOptions:{}, isLinkage:false, emptyOptions:{}, wrapOptions:{ stageView:{} } } constructor(props:ISProps) { super(props); this.state = { visible:false, floor:this.getMaxFloor(), } } public getMaxFloor = ()=>{ const { sourceData,isLinkage } = this.props if(_.isEmpty(sourceData)) return 0 if(isLinkage) return sourceData.length let floor:number = 1 function treeData(arr:any){ const sub:any = arr.find((item:any)=>item?.sub?.length > 0) if(sub){ floor = floor 1 let arr2:any = [] arr.forEach((item:any)=>{ if(item?.sub?.length>0){ arr2 = arr2.concat(item.sub) } }) treeData(arr2) } } treeData(sourceData) return floor } public show = ()=>{ this.setState({visible:true}) } public confirm = ()=>{ const { confirm=_.noop } = this.props this.hide() confirm(this.selectedData) } public hide = ()=>{ const { cancel=_.noop } = this.props cancel() this.setState({visible:false}) } public getSelected = ()=>this.selectedData private setSelected = (item:ISourceType,floor:number)=>{ this.selectedData[floor] = item } public componentDidUpdate(preProps,prevState,snapshot){ if(!_.isEqual(this.props.sourceData,preProps.sourceData)){ this.setState({ floor:this.getMaxFloor() }) } } public render(){ const { visible, floor, } = this.state const { selectData, sourceData, pickerType, customHead, headOptions, maskOptions, itemOptons, isLinkage, renderListEmptyComponent, emptyOptions, wrapOptions, EmptyView = DefaultView } = this.props const { stageView } = wrapOptions if(!visible) return null const { maxLength=9, itemHeihght=50, ActiveTextStyle={}, normalTextStyle={} } = itemOptons return ( <Modal visible={visible} animationType="slide" transparent={true} > <View style={styles.container} > <Empty hide={this.hide}/> <View style={{ width:getScreenWidth()}}> <Head headOptions={headOptions} hide={this.hide} confirm={this.confirm} customHead={customHead} /> <View style={[{height:itemHeihght*maxLength},styles.contentView]}> <View style={[styles.stage,stageView]}>{ _.isEmpty(sourceData) ?<EmptyView/>: <WrapComponent sourceList={sourceData} setSelect={this.setSelected} floor={floor} currentFloor={0} maxLength={maxLength} defaultSelected = {selectData} itemHeihght={itemHeihght} ActiveTextStyle={ActiveTextStyle} normalTextStyle={normalTextStyle} pickerType={pickerType} originData={sourceData} isLinkage={isLinkage} renderListEmptyComponent={renderListEmptyComponent} emptyOptions={emptyOptions} />} </View> <MaskViewmaxLength={maxLength}itemHeihght={itemHeihght}maskOptions={maskOptions} /> </View> </View> </View> </Modal> ) } }}interface ISItemProps { sourceList:ISourceType[], setSelect:Callback, floor:number, currentFloor:number, maxLength: 5 | 7 | 9, defaultSelected:ISourceType[], itemHeihght:number, ActiveTextStyle:any, normalTextStyle:any, pickerType:string, isLinkage:boolean, originData:any, renderListEmptyComponent:Callback, emptyOptions:any}interface ISItemState { nextData:ISourceType[], currentChoose:ISourceType, initialScrollIndex:number, renderList:any[], surerefresh:any}class PickerAlertViewItem extends PureComponent<ISItemProps,ISItemState> { public scrollView:any public flatEl:any public currentItem:any public itemEL:any public config:any = { waitForInteraction: false, itemVisiblePercentThreshold:100, } public constructor(props:ISItemProps) { super(props); this.state = { nextData:this.defaultRenderList(), currentChoose:this.getDefaultChoose(), initialScrollIndex:this.getInitialScrollIndex(), renderList:this.flatListData(), surerefresh:null, } } public getInitialScrollIndex = ()=>{ const {defaultSelected,currentFloor,sourceList } = this.props if(_.isEmpty(defaultSelected)) return 0 const initIndex = sourceList.findIndex(item=>String(item.id) === String(defaultSelected[currentFloor]?.id)) return initIndex<0?0:initIndex } public defaultRenderList = ()=>{ const { currentFloor, floor, defaultSelected, sourceList,isLinkage,originData} = this.props if(isLinkage){ return originData[currentFloor 1] } const getNoFefault = ()=>this.props.sourceList?.[0]?.sub || [] const getDefaultList = ()=>{ if(currentFloor 1 === floor ) return [] return sourceList.find(value=>value.id === defaultSelected[currentFloor].id)?.sub || getNoFefault() } return _.isEmpty(defaultSelected)?getNoFefault():getDefaultList() } public getDefaultChoose = ()=>{ const { defaultSelected, currentFloor, sourceList } = this.props return _.isEmpty(defaultSelected)?sourceList?.[0]:(sourceList.find(item=>item.id === defaultSelected?.[currentFloor]?.id) || sourceList?.[0]) } public mid = ()=>{ const { maxLength } = this.props return Math.floor(maxLength/2) } public flatListData = (nextData:any[])=>{ const { sourceList,currentFloor,originData ,isLinkage} = this.props const mid = this.mid() const arr = Array(mid).fill({id:'',name:'',sub:[]}) let currentData = nextData?nextData:sourceList if(isLinkage){ currentData = originData[currentFloor] } if(currentData.length === 0 || !currentData) return [] return [...arr,...currentData,...arr] } public getItemLayout = (data:any,index:any) =>{ const { itemHeihght } = this.props return {length: itemHeihght, offset: itemHeihght * index, index} } public renderItem = ({item,index,separators}:any)=>{ const { itemHeihght ,ActiveTextStyle,normalTextStyle,pickerType} = this.props const {currentChoose} = this.state const itemPress = (pickerType === 'scroll' || item.id === currentChoose?.id)?_.noop:this.clickItem return <TouchableWithoutFeedback onPress={()=>itemPress(item,index)}> <Text numberOfLines={1} style={[ {height:itemHeihght,textAlign:'center',lineHeight:itemHeihght,opacity:0.8,paddingHorizontal: 10, }, item.id === currentChoose?.id?ActiveTextStyle:normalTextStyle ]} >{item.name}</Text> </TouchableWithoutFeedback> } public clickItem =(item:ISourceType,index:any)=>{ const mid = this.mid() if(index<mid) return if(!item) return this.scrollToIndex(index) this.chooseItem(index,item) } public scrollToIndex = (index:any)=>{ const { renderList } = this.state if(renderList.length === 0 || !renderList) return if(this.flatEl){ this.flatEl.scrollToIndex({ index, viewPosition:0.5, animated:true }) } } public chooseItem = (index:number,item:ISourceType)=>{ const { setSelect,currentFloor,isLinkage } = this.props setSelect(item,currentFloor) if(isLinkage) return this.setState({ currentChoose:item || {}, nextData:item?.sub || [] },()=>{ if(this.itemEL) this.itemEL.reduction() }) } public reduction=()=>{ const currentChoose = this.props.sourceList?.[0] || {} const nextData = currentChoose?.sub || [] const mid = this.mid() this.setState({ currentChoose, nextData, renderList:this.flatListData(), surerefresh:Date.now() Math.random(), }) } public componentDidMount(){ this.initSelected() } public componentDidUpdate(preProp:ISItemProps,preState:ISItemState){ const mid = this.mid() if(this.state.surerefresh !== preState.surerefresh){ _.delay(()=>this.clickItem(this.state.currentChoose,mid),100) } } public initSelected = ()=>{ const {setSelect,currentFloor } = this.props const { currentChoose } = this.state setSelect(currentChoose,currentFloor) if(this.flatEl) this.flatEl.recordInteraction() } public renderListEmptyComponent = (data:any)=>{ const {renderListEmptyComponent,itemHeihght,emptyOptions,maxLength} = this.props if(renderListEmptyComponent) return renderListEmptyComponent() return <View style={{height:itemHeihght*maxLength,justifyContent:'center',alignItems: 'center'}}> <Text numberOfLines={1} style={[ { height:itemHeihght, textAlign:'center', lineHeight:itemHeihght, opacity:0.8, paddingHorizontal: 10, } ]} >{emptyOptions.descText || '暂无数据'}</Text> </View> } public render(){ const { floor, currentFloor, setSelect, defaultSelected, maxLength, itemHeihght=50, ActiveTextStyle, normalTextStyle, pickerType, isLinkage, originData, emptyOptions, } = this.props const { nextData, initialScrollIndex, renderList, } = this.state const nextFloor = currentFloor 1 return ( <> <FlatList style={{flex:1}} ref={ref=>this.flatEl = ref} showsHorizontalScrollIndicator={false} showsVerticalScrollIndicator={false} keyExtractor={(item: object, index: number) => String(index)} renderItem={this.renderItem} viewabilityConfig={this.config} data={renderList} getItemLayout={this.getItemLayout} initialScrollIndex={initialScrollIndex} onMomentumScrollEnd={this._moveEnd} scrollEnabled={pickerType === 'click'?false:true} ListEmptyComponent={this.renderListEmptyComponent} /> { floor > nextFloor ? <PickerAlertViewItem ref={ref=>this.itemEL = ref} sourceList={nextData} floor={floor} setSelect={setSelect} currentFloor={nextFloor} defaultSelected={defaultSelected} maxLength={maxLength} itemHeihght={itemHeihght} ActiveTextStyle={ActiveTextStyle} normalTextStyle={normalTextStyle} pickerType={pickerType} isLinkage={isLinkage} originData={originData} emptyOptions={emptyOptions} />: null } </> ) } private _moveEnd=(e)=>{ const {itemHeihght} = this.props const { renderList } = this.state const contentOffset = e.nativeEvent.contentOffset.y; const mid = this.mid() const index = Math.round(contentOffset/itemHeihght) mid this.clickItem(renderList[index],index) }}export default WithHeadAndMethod(PickerAlertViewItem)

接上一版 多级联动组件；增加了非联动组件；完善了配置；优化了使用过程中的小问题；

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