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150 lines
3.0 KiB
150 lines
3.0 KiB
<template>
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<view
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class="mix-page-header row"
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:style="{
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height: navigationBarHeight+statusBarHeight+'px',
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paddingTop: statusBarHeight+'px',
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backgroundColor: 'rgba(255,255,255, '+headerOpacity+')'
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}"
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>
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<view class="btn center" @click="navBack">
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<text class="mix-icon icon-xiangzuo" :class="{dark: headerOpacity < 0.5}"></text>
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</view>
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<view class="cen center">
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<view
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class="cen-item"
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:class="{active: index === currentAnchor}"
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:style="{opacity: headerOpacity}"
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v-for="(item, index) in anchorList"
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:key="index"
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@click="navToAnchor(index)"
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>
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<text>{{ item.name }}</text>
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</view>
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</view>
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<view class="btn"></view>
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</view>
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</template>
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<script>
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let _disableScroll = false;
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export default {
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name: 'ProductPageHeader',
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data() {
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return {
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headerOpacity: 0,
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currentAnchor: 0,
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anchorList: [
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{id: 1, name: '商品', top: 0},
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{id: 2, name: '评价', top: 0},
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{id: 3, name: '详情', top: 0},
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]
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};
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},
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props: {
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},
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computed: {
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statusBarHeight(){
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return this.systemInfo.statusBarHeight;
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},
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navigationBarHeight(){
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return this.systemInfo.navigationBarHeight;
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}
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},
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methods: {
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//转到锚点
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navToAnchor(index){
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const {headerOpacity, anchorList, statusBarHeight, navigationBarHeight} = this;
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if(this.headerOpacity == 0){
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return;
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}
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_disableScroll = true;
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uni.pageScrollTo({
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scrollTop: anchorList[index].top - 1,
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duration: 200
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})
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this.currentAnchor = index;
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setTimeout(()=>{
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_disableScroll = false;
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}, 400)
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},
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pageScroll(e){
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//头部渐变
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this.headerOpacity = e.scrollTop/150;
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//锚点切换
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if(_disableScroll){
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return;
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}
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const {currentAnchor, anchorList} = this;
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const cur = e.scrollTop >= anchorList[2].top ? 2 : e.scrollTop >= anchorList[1].top ? 1:0;
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if(cur !== currentAnchor){
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this.currentAnchor = cur;
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}
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},
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navBack(){
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uni.navigateBack();
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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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.mix-page-header{
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position: fixed;
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left: 0;
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top: 0;
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z-index: 90;
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justify-content: space-between;
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width: 100%;
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}
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.btn{
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width: 80rpx;
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}
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.icon-xiangzuo{
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width: 52rpx;
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height: 52rpx;
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border-radius: 100rpx;
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font-size: 36rpx;
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color: #333;
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text-align: center;
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line-height: 52rpx;
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&.dark{
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background-color: rgba(0,0,0,.5);
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color: #fff;
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}
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}
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.cen{
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flex: 1;
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height: 100%;
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position: relative;
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.cen-item{
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width: 50px;
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height: 36px;
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font-size: 15px;
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color: #333;
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text-align: center;
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line-height: 36px;
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position: relative;
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}
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.active{
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font-size: 17px;
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font-weight: 700;
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&:after{
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position: absolute;
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left: 50%;
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bottom: 0;
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transform: translateX(-50%);
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content: '';
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width: 30px;
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height: 2px;
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background-color: $base-color;
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border-radius: 10rpx;
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}
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}
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}
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</style>
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