vue实现滑块拖拽校验功能的全过程
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2022-05-07 17:42:05
效果图定义骨架，写html和csshtml部分
定义骨架，写html和css
<...
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
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