vue swipeCell滑动单元格(仿微信)的实现示例 - JavaScript

抽离Vant weapp滑动单元格代码改造而成

带有拉动弹性回弹效果

demo展示：https://littaotao.github.io/me/index（切换为浏览器调试的手机模式并且再次刷新一次）

<template>	<div		class="cell_container"		@touchstart		v-click-outside="handleClickOutside"		@click="getClickHandler('cell')">		<div			:style="{'transform':			'translateX('+(offset+(isElastic?elasticX:0))+'px)','transition-duration':dragging?'0s':'0.6s'}">			<!-- <div ref="cellLeft" class="cell_left" @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'}">标记</div>				<div 					:class="type?'divPostion':''" 					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'}">不再关注</div>				<div 					:class="type?'divPostion':''" 					: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'}">删除</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 instead		onClose: 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 常规 1 定位		},		isElastic:{ //弹性			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() {		//防止弹性效果影响宽度		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.$refs[ref].getBoundingClientRect();				//type=1定位时获取宽度为0，为此采用获取子元素宽度之和				if(!rect.width){					let childWidth = 0;					for(const item of this.$refs[ref].children){						childWidth += item.getBoundingClientRect().width					}					return childWidth;				}				return rect.width;			}			return 0;		},		handleClickOutside(e){			if(this.opened) this.close()		},		// @exposed-api		open(position) {			const offset =			position === 'left' ? this.computedLeftWidth : -this.computedRightWidth;			this.opened = true;			this.offset = offset;			this.$emit('open', {				position,				name: this.name,				// @deprecated				// should be removed in next major version				detail: this.name,			});		},		// @exposed-api		close(position) {			this.offset = 0;			if (this.opened) {				this.opened = false;				this.$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				);				//增加弹性				if(this.computedRightWidth && this.offset === -this.computedRightWidth || this.computedLeftWidth && this.offset === this.computedLeftWidth){					//					this.preventDefault(event, this.stopPropagation);					//弹性系数					this.elasticX = (this.deltaX + this.startOffset - this.offset)/4;				}			}else{				//上下滑动后取消close				this.dragging = true;				this.lockClick = true;			}		},		onTouchEnd() {			if (this.disabled) {				return;			}			//回弹			this.elasticX = 0			if (this.dragging) {				this.toggle(this.offset > 0 ? 'left' : 'right');				this.dragging = false;				// compatible with desktop scenario				setTimeout(() => {					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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