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https://github.com/ialley-workshop-open/uni-halo.git
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小莫唐尼
80 lines
1.4 KiB
Vue
80 lines
1.4 KiB
Vue
<template>
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<view class="scroll-btn" :style="{ bottom: bottom }" @click.stop="fnScroll()">
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<text v-if="_scrollTop >= 180" class="iconfont icon-long-arrow-up"></text>
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<text v-else class="iconfont icon-long-arrow-down"></text>
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</view>
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</template>
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<script>
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import throttle from '@/utils/throttle.js';
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export default {
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name: 'scroll-btn',
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props: {
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bottom: {
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type: String,
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default: '180rpx'
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},
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scrollTop: {
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type: Number,
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default: 0
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}
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},
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data() {
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return { _scrollTop: 0 };
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},
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watch: {
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scrollTop(val) {
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this._scrollTop = val;
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console.log('监听1：', val);
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this.$forceUpdate();
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}
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},
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created() {
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this._scrollTop = this.scrollTop;
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},
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methods: {
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fnScroll() {
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throttle(() => {
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const isTop = this._scrollTop >= 180;
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this._scrollTop = isTop ? 0 : 999999;
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uni.pageScrollTo({
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duration: 500,
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scrollTop: this._scrollTop
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});
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this.$emit('update:scrollTop', this._scrollTop);
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});
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}
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}
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};
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</script>
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<style scoped lang="scss">
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.scroll-btn {
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position: fixed;
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// bottom: 200rpx;
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// right: -90rpx;
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right: 52rpx;
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width: 80rpx;
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height: 80rpx;
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display: flex;
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align-items: center;
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justify-content: center;
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box-sizing: border-box;
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border-radius: 50%;
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border: 4rpx solid #ffffff;
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background-color: #bfe9ef;
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box-shadow: 0rpx 4rpx 24rpx rgba(0, 0, 0, 0.1);
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z-index: 99;
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transition: right 0.5s ease-in-out;
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&.is-show {
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right: 52rpx;
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}
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.iconfont {
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font-size: 36rpx;
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color: #555;
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}
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}
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</style>
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