先看效果图,这是弹窗效果,要求就是弹窗出现和消失时候不是很突兀,要有过渡效果。
首先看弹窗出现的实现思路,先加一个beforeActive类,再加一个active类。我们看审查元素,一开始display:none;
在beforeActive中display:block;只是background: transparent;然后在一定时间后再加上active类。问题就来了,在打开弹窗代码中,如下图,settimeout第二个参数小于60ms效果就会不稳定,有时候有过渡效果,有时候没有过渡效果。
// openbtn(){ // let _this=this; // _this.show =true; // _this.isbeforeActive=true; // setTimeout(function(){ // _this.isactive=true; // },60) // },
想了很久也没明白,后来终于明白,原来是vue渲染是有生命周期的,本来是先渲染befeactive,再渲染active,如果间隔时间太短就一次拿出来渲染了,所以没有效果。
在退出弹框时候这个时间小于600ms就显得特快,200ms的退出时间显得比60ms的进入还要急促很多,是因为退出等动画执行完毕才可以,而一个动画的执行需要300多,所以要用600ms
close_class(){ let _this=this; _this.isactive=false; setTimeout(function(){ _this.isbeforeActive=false; _this.show =false; },600) },
以下是完整代码
<template> <div> <button @click="openbtn">显示</button> <div v-show="show"> <div class="shenfenPop-page" v-bind:class="{beforeActive:isbeforeActive, active:isactive}" @click="cancel_all"> <div class="pop-wrap" @click.stop="stop"> <div class="pop-title">选择您的身份 <div class="pop-sure" id="pop-sure" @click="decision_click">确定</div> <div class="pop-cancel" id="pop-cancel" @click="close_click">取消</div> </div> <div class="pop-list"> <ul> <li shenfen-id="jsptpl-style" v-for="(option,index) in options" @click.stop="add_class(index)" v-bind:class="{active:index==current}"> <div class="pop-info">{{option.text}}</div> <div class="pop-desc">{{option.value}}</div> <div class="pop-arrow"></div> </li> </ul> </div> </div> </div> </div> </div> </template> <script> export default { name: 'app', data() { return { show: false, current:1, isbeforeActive:false, isactive:false, options: [ {"text": "房东", "value": "房屋所有者,具备认证房本资质"}, {"text": "转租", "value": "转让自己承租的房子"}, {"text": "经纪人", "value": "房产中介,拥有专业的展示空间"}, {"text": "职业房东", "value": "公寓经营者/多房源管理者"} ], }; }, mounted() { }, computed: {}, methods: { add_class(index){ this.current=index; }, stop(){ }, openbtn(){ let _this=this; _this.show =true; _this.isbeforeActive=true; setTimeout(function(){ _this.isactive=true; },60) }, close_class(){ let _this=this; _this.isactive=false; setTimeout(function(){ _this.isbeforeActive=false; _this.show =false; },600) }, decision_click(){ this.close_class(); }, close_click() { this.close_class(); }, cancel_all(){ this.close_class(); }, }, watch: {}, }; </script> <style lang="scss" type="text/scss"> @import "../../../common/css/mixin"; * { margin: 0px; padding: 0px; list-style: none } .shenfenPop-page { width: 100%; height: 100%; position: fixed; top: 0px; transition: all 0.4s ease; } .shenfenPop-page .pop-wrap { transition: all 0.4s ease; position: absolute; width: 100%; bottom: 0px; background: #ffffff; } .shenfenPop-page .pop-title { height: 1.2rem; background: #f9fafc; text-align: center; font-size: 0.37333rem; color: #999999; line-height: 1.2rem; position: relative; } .shenfenPop-page .pop-title:after { content: ""; position: absolute; top: 0; left: 0; border: 1px solid #e3e3e4; -webkit-box-sizing: border-box; box-sizing: border-box; width: 200%; height: 200%; -webkit-transform: scale(0.5); transform: scale(0.5); -webkit-transform-origin: left top; transform-origin: left top; } .shenfenPop-page .pop-title .pop-sure, .shenfenPop-page .pop-title .pop-cancel { position: absolute; z-index: 1; width: 1.6rem; height: 1.2rem; line-height: 1.22667rem; color: #ff552e; top: 0px; right: 0px; } .shenfenPop-page .pop-title .pop-sure.pop-cancel, .shenfenPop-page .pop-title .pop-cancel.pop-cancel { right: auto; left: 0px; color: #7b7b7b; } .shenfenPop-page .pop-list { widtH: 100%; } .shenfenPop-page .pop-list ul { width: 9.33333rem; margin: 0 auto; } .shenfenPop-page .pop-list ul li { width: 100%; height: 1.86667rem; position: relative; } .shenfenPop-page .pop-list ul li:after { border-radius: 0px; content: ""; position: absolute; top: 0; left: 0; z-index: -1; border-bottom: 1px solid #f1f1f1; -webkit-box-sizing: border-box; box-sizing: border-box; width: 200%; height: 200%; -webkit-transform: scale(0.5); transform: scale(0.5); -webkit-transform-origin: left top; transform-origin: left top; } .shenfenPop-page .pop-list ul li .pop-info { position: absolute; top: 0.4rem; font-size: 0.45333rem; color: #333333; left: 0.06667rem; } .shenfenPop-page .pop-list ul li .pop-desc { font-size: 0.32rem; position: absolute; left: 0.06667rem; top: 0.98667rem; color: #7b7b7b; } .shenfenPop-page .pop-list ul li .pop-arrow { position: absolute; right: 0.26667rem; width: 22px; height: 22px; top: 50%; margin-top: -11px; background-image: url("data:image/png;base64,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"); background-size: cover; } .shenfenPop-page .pop-list ul li.active .pop-arrow { background-image: url("data:image/png;base64,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"); } .shenfenPop-page.beforeActive { display: block; background: transparent; } .shenfenPop-page.beforeActive .pop-wrap { transform: translateY(100%); } .shenfenPop-page.active { /*background: rgba(0, 0, 0, 0.7);*/ } .shenfenPop-page.active .pop-wrap { transform: translateY(0); } </style>
补充知识:setTimeout在vue中的正确使用
如下所示:
mounted(){ setTimeout(this.tishi(),5000) },
这样写,发现直接就执行了tishi函数,而不是5s之后执行
修改为:
mounted(){ let _this = this; setTimeout(() => { _this.tishi() },5000) },
以上这篇解决vue.js中settimeout遇到的问题(时间参数短效果不稳定)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。
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