抽離Vant weapp滑動單元格代碼改造而成

帶有拉動彈性回彈效果

demo展示：https://littaotao.github.io/me/index（切換為瀏覽器調試的手機模式并且再次刷新一次）

<template><divclass='cell_container'@touchstartv-click-outside='handleClickOutside'@click='getClickHandler(’cell’)'><div:style='{’transform’:’translateX(’+(offset+(isElastic?elasticX:0))+’px)’,’transition-duration’:dragging?’0s’:’0.6s’}'><!-- <div ref='cellLeft' @click='getClickHandler(’left’, true)'><div>收藏</div><div>添加</div></div> --><div@touchend='onClick()':class='offset?’cell_content’:’cell_content_active’'>SwipeCell</div><div ref='cellRight'class='cell_right'@click='getClickHandler(’right’, true)'><div:class='type?’divPostion’:’’'ref='remove':style='{’background’:’#ccc’,’padding-left’:’10px’,’padding-right’:10+(isElastic?Math.abs(elasticX/3):0)+’px’,’transition-duration’:dragging?’0s’:’0.6s’}'>標記</div><div : ref='tag' :style='{’transform’: type?’translateX(’+(-offset*removeWidth/cellRightWidth-(isElastic?elasticX/3:0))+’px)’:’’,’padding-left’:’10px’,’padding-right’:10+(isElastic?Math.abs(elasticX/3):0)+’px’,’transition-duration’:dragging?’0s’:’0.6s’,’background’:’#000’}'>不再關注</div><div : :style='{’transform’: type?’translateX(’+(-offset*(removeWidth+tagWidth)/cellRightWidth-(isElastic?elasticX/3*2:0))+’px)’:’’,’padding-left’:’10px’,’padding-right’:10+(isElastic?Math.abs(elasticX/3):0)+’px’,’transition-duration’:dragging?’0s’:’0.6s’}'>刪除</div></div></div></div></template><script>import ClickOutside from ’vue-click-outside’;import { TouchMixin } from ’@/components/mixins/touch’;export default{name:'SwipeCell',props: {// @deprecated// should be removed in next major version, use beforeClose insteadonClose: Function,disabled: Boolean,leftWidth: [Number, String],rightWidth: [Number, String],beforeClose: Function,stopPropagation: Boolean,name: {type: [Number, String],default: ’’,},//type:{type:[Number,String],default:1 //0 常規 1 定位},isElastic:{ //彈性type:Boolean,default:true}},data(){return {offset: 0,dragging: true,//-位移elasticX:0,removeWidth:0,tagWidth:0,cellRightWidth:0,cellLeftWidth:0}},computed: {computedLeftWidth() {return +this.leftWidth || this.getWidthByRef(’cellLeft’);},computedRightWidth() {return +this.rightWidth || this.getWidthByRef(’cellRight’);},},mounted() {//防止彈性效果影響寬度this.cellRightWidth = this.getWidthByRef(’cellRight’);this.cellLeftWidth = this.getWidthByRef(’cellLeft’);this.removeWidth = this.getWidthByRef(’remove’);this.tagWidth = this.getWidthByRef(’tag’);this.bindTouchEvent(this.$el);},mixins: [TouchMixin],directives: {ClickOutside},methods: {getWidthByRef(ref) {if (this.$refs[ref]) {const rect = this.$refs[ref].getBoundingClientRect();//type=1定位時獲取寬度為0，為此采用獲取子元素寬度之和if(!rect.width){let childWidth = 0;for(const item of this.$refs[ref].children){childWidth += item.getBoundingClientRect().width}return childWidth;}return rect.width;}return 0;},handleClickOutside(e){if(this.opened) this.close()},// @exposed-apiopen(position) {const offset =position === ’left’ ? this.computedLeftWidth : -this.computedRightWidth;this.opened = true;this.offset = offset;this.$emit(’open’, {position,name: this.name,// @deprecated// should be removed in next major versiondetail: this.name,});},// @exposed-apiclose(position) {this.offset = 0;if (this.opened) {this.opened = false;this.$emit(’close’, {position,name: this.name,});}},onTouchStart(event) {if (this.disabled) {return;}this.startOffset = this.offset;this.touchStart(event);},range(num, min, max) {return Math.min(Math.max(num, min), max);},preventDefault(event, isStopPropagation) {/* istanbul ignore else */if (typeof event.cancelable !== ’boolean’ || event.cancelable) {event.preventDefault();}if (this.isStopPropagations) {stopPropagation(event);}},stopPropagations(event) {event.stopPropagation();},onTouchMove(event) {if (this.disabled) {return;}this.touchMove(event);if (this.direction === ’horizontal’) {this.dragging = true;this.lockClick = true;const isPrevent = !this.opened || this.deltaX * this.startOffset < 0;if (isPrevent) {this.preventDefault(event, this.stopPropagation);}this.offset = this.range(this.deltaX + this.startOffset,-this.computedRightWidth,this.computedLeftWidth);//增加彈性if(this.computedRightWidth && this.offset === -this.computedRightWidth || this.computedLeftWidth && this.offset === this.computedLeftWidth){//this.preventDefault(event, this.stopPropagation);//彈性系數this.elasticX = (this.deltaX + this.startOffset - this.offset)/4;}}else{//上下滑動后取消closethis.dragging = true;this.lockClick = true;}},onTouchEnd() {if (this.disabled) {return;}//回彈this.elasticX = 0if (this.dragging) {this.toggle(this.offset > 0 ? ’left’ : ’right’);this.dragging = false;// compatible with desktop scenariosetTimeout(() => {this.lockClick = false;}, 0);}},toggle(direction) {const offset = Math.abs(this.offset);const THRESHOLD = 0.15;const threshold = this.opened ? 1 - THRESHOLD : THRESHOLD;const { computedLeftWidth, computedRightWidth } = this;if (computedRightWidth &&direction === ’right’ &&offset > computedRightWidth * threshold) {this.open(’right’);} else if (computedLeftWidth &&direction === ’left’ &&offset > computedLeftWidth * threshold) {this.open(’left’);} else {this.close();}},onClick(position = ’outside’) {this.$emit(’click’, position);if (this.opened && !this.lockClick) {if (this.beforeClose) {this.beforeClose({position,name: this.name,instance: this,});} else if (this.onClose) {this.onClose(position, this, { name: this.name });} else {this.close(position);}}},getClickHandler(position, stop) {return (event) => {if (stop) {event.stopPropagation();}this.onClick(position);};},}}</script><style lang='stylus' scoped>.cell_container{position: relative;overflow: hidden;line-height: 68px;height:68px;div{height: 100%;.cell_content{height: 100%;width: 100%;text-align: center;}.cell_content_active{height: 100%;width: 100%;text-align: center;&:active{background: #e8e8e8;}}.cell_left,.cell_right{position: absolute;top: 0;height: 100%;display: flex;color: #fff;.divPostion{position: absolute;}div{white-space:nowrap;display: flex;align-items: center;background: #ccc;}}.cell_left{left: 0;transform:translateX(-100%);}.cell_right{right: 0;transform:translateX(100%);}}}</style>

touch.js

import Vue from ’vue’;export const isServer=false;const MIN_DISTANCE = 10;const TouchMixinData = { startX: Number, startY: Number, deltaX: Number, deltaY: Number, offsetX: Number, offsetY: Number, direction: String};function getDirection(x,y) { if (x > y && x > MIN_DISTANCE) { return ’horizontal’; } if (y > x && y > MIN_DISTANCE) { return ’vertical’; } return ’’;}export let supportsPassive = false;export function on( target, event, handler, passive = false) { if (!isServer) { target.addEventListener( event, handler, supportsPassive ? { capture: false, passive } : false ); }}export const TouchMixin = Vue.extend({ data() {TouchMixinData return { direction: ’’ } ; }, methods: { touchStart() { this.resetTouchStatus(); this.startX = event.touches[0].clientX; this.startY = event.touches[0].clientY; }, touchMove() { const touch = event.touches[0]; this.deltaX = touch.clientX - this.startX; this.deltaY = touch.clientY - this.startY; this.offsetX = Math.abs(this.deltaX); this.offsetY = Math.abs(this.deltaY); this.direction = this.direction || getDirection(this.offsetX, this.offsetY); }, resetTouchStatus() { this.direction = ’’; this.deltaX = 0; this.deltaY = 0; this.offsetX = 0; this.offsetY = 0; }, // avoid Vue 2.6 event bubble issues by manually binding events // https://github.com/youzan/vant/issues/3015 bindTouchEvent( el ) { const { onTouchStart, onTouchMove, onTouchEnd } = this; on(el, ’touchstart’, onTouchStart); on(el, ’touchmove’, onTouchMove); if (onTouchEnd) { on(el, ’touchend’, onTouchEnd); on(el, ’touchcancel’, onTouchEnd); } }, },});

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