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vue实现滑块拖拽校验功能的全过程

51自学网 2022-05-02 21:35:17
  javascript

效果图

定义骨架,写html和css

html部分

<template>    <div class="drag-wrapper" ref="dragDiv">        <div class="drag_bg"></div>        <div class="drag_text f14">{{ confirmWords }}</div>        <!-- 移动的模块 -->        <div ref="moveDiv"             @mousedown="mousedownFn($event)"             :class="{'handler_ok_bg': confirmSuccess}"             class="handler handler_bg"></div>    </div></template>

css部分: 由于担心图片源的问题,所以写成了base64的图片

<style scoped>    .drag{        position: relative;        background-color: #e8e8e8;        width: 100%;        height: 40px;        line-height: 40px;        text-align: center;    }    .handler{        width: 40px;        height: 40px;        border: 1px solid #ccc;        cursor: move;        position: absolute;top: 0px;left: 0px;    }    .handler_bg{        background: #fff url("data:image/png;base64,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") no-repeat center;    }    .handler_ok_bg{        background: #fff url("data:image/png;base64,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") no-repeat center;    }    .drag_bg{        background-color: #7ac23c;        height: 40px;        width: 0px;    }    .drag_text{        position: absolute;        top: 0px;        width: 100%;text-align: center;        -moz-user-select: none;        -webkit-user-select: none;        user-select: none;        -o-user-select:none;        -ms-user-select:none;    }</style>

实现滑动拖拽校验

定义参数

data() {    return {        beginClientX:0,               // 距离屏幕左端距离        mouseMoveStata:false,         // 触发拖动状态  判断        maxwidth:'',                  // 拖动最大宽度,依据滑块宽度算出来的        confirmWords:'拖动滑块验证',   // 滑块文字        confirmSuccess:false          // 验证成功判断    }}

1. 在mounted里面,根据滑块宽度计算可拖动最大宽度以及监听手指的触摸和离开事件

mounted() {    // 根据滑块宽度计算可拖动最大宽度    this.maxwidth = this.$refs.dragDiv.clientWidth - this.$refs.moveDiv.clientWidth    // 监听手指的触摸事件    document.getElementsByTagName('html')[0].addEventListener('mousemove', this.mouseMoveFn)    // 监听手指离开事件    document.getElementsByTagName('html')[0].addEventListener('mouseup', this.moseUpFn)}

2. 编写手指滑动的事件和手指离开的事件

mousemove事件

首先判断是否触发拖动状态,然后计算拖动的距离和模块距离,实时赋值

//验证成功函数mouseMoveFn(e){    if(this.mouseMoveStata){        let width = e.clientX - this.beginClientX        if(width > 0 && width <= this.maxwidth) {            document.getElementsByClassName('handler')[0].style.left = width + 'px'            document.getElementsByClassName('drag_bg')[0].style.width = width + 'px'        }else if(width > this.maxwidth) this.successFunction()    }},

mouseup事件

把拖动状态改成false,并且把滑块移到对应的手指落下位置上

moseUpFn(e) {    this.mouseMoveState = !1                        // 修改状态    const width = e.clientX - this.beginClientX     // 计算获取宽度    if(width < this.maxwidth) {                     // 当宽度小于模块的宽度时,赋值        document.getElementsByClassName('handler')[0].style.left = 0 + 'px'        document.getElementsByClassName('drag_bg')[0].style.width = 0 + 'px'    }}

在上面html部分的handler块里,定义了mousedown事件(mousedownFn($event))

需要阻止文件选中等浏览器默认行为,并把触发拖动状态这个阈值打开,记录手指移动的距离

mousedownFn:function (e) {    e.preventDefault && e.preventDefault()   // 阻止文字选中等 浏览器默认事件    this.mouseMoveStata = true               // 把触发拖动状态这个阈值打开    this.beginClientX = e.clientX            // 记录手指移动的距离},

至此,功能就完成了。。

完整的JS代码如下

<script>    export default {        data(){            return {                beginClientX:0,           /*距离屏幕左端距离*/                mouseMoveStata:false,     /*触发拖动状态  判断*/                maxwidth:'',               /*拖动最大宽度,依据滑块宽度算出来的*/                confirmWords:'拖动滑块验证',   /*滑块文字*/                confirmSuccess:false           /*验证成功判断*/            }        },        mounted(){            this.maxwidth = this.$refs.dragDiv.clientWidth - this.$refs.moveDiv.clientWidth            document.getElementsByTagName('html')[0].addEventListener('mousemove',this.mouseMoveFn)            document.getElementsByTagName('html')[0].addEventListener('mouseup',this.moseUpFn)        },        methods: {            mousedownFn:function (e) {                if(!this.confirmSuccess){                    e.preventDefault && e.preventDefault()   //阻止文字选中等 浏览器默认事件                    this.mouseMoveStata = true                    this.beginClientX = e.clientX                }            },            //mousedoen 事件            successFunction(){                this.confirmSuccess = true                this.confirmWords = '验证通过'                this.$emit('onValidation', true)                if(window.addEventListener){                    document.getElementsByTagName('html')[0].removeEventListener('mousemove',this.mouseMoveFn)                    document.getElementsByTagName('html')[0].removeEventListener('mouseup',this.moseUpFn)                }else document.getElementsByTagName('html')[0].removeEventListener('mouseup',()=>{})                document.getElementsByClassName('drag_text')[0].style.color = '#fff'                document.getElementsByClassName('handler')[0].style.left = this.maxwidth + 'px'                document.getElementsByClassName('drag_bg')[0].style.width = this.maxwidth + 'px'            },            //验证成功函数            mouseMoveFn(e){                if(this.mouseMoveStata){                    let width = e.clientX - this.beginClientX                    if(width > 0 && width <= this.maxwidth) {                        document.getElementsByClassName('handler')[0].style.left = width + 'px'                        document.getElementsByClassName('drag_bg')[0].style.width = width + 'px'                    }else if(width > this.maxwidth) this.successFunction()                }            },            //mousemove事件            moseUpFn(e){                this.mouseMoveStata = false                var width = e.clientX - this.beginClientX                if(width<this.maxwidth){                    document.getElementsByClassName('handler')[0].style.left = 0 + 'px'                    document.getElementsByClassName('drag_bg')[0].style.width = 0 + 'px'                }            }        }    }</script>

总结

到此这篇关于vue实现滑块拖拽校验功能的文章就介绍到这了,更多相关vue滑块拖拽校验内容请搜索wanshiok.com以前的文章或继续浏览下面的相关文章希望大家以后多多支持wanshiok.com!


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