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。
移动端弹窗效果图
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;
弹窗未出现时候审查元素
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>

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