由于有时候UI出图很丰富,根本没有固定的导航栏,但是又要实现滚动页面有固定导航栏,还是渐渐显示的效果
<template><view><!-- 自定义导航栏 --><view class="custom-navbar" :style="{opacity: navbarOpacity, position: navbarFixed ? 'fixed' : 'absolute', background: `rgba(255,255,255,${navbarOpacity})`}"><!-- 导航栏内容 --><text>我的导航栏</text></view><!-- 页面内容 --><view class="content" @scroll="handleScroll" :style="{paddingTop: navbarHeight + 'px'}"><!-- 页面内容 --></view></view>
</template><script>
export default {data() {return {navbarOpacity: 0, // 透明度navbarFixed: false, // 是否固定navbarHeight: 44, // 导航栏高度，根据实际调整scrollTop: 0 // 滚动位置}},methods: {handleScroll(e) {// 获取滚动位置（H5和微信小程序获取方式不同）let scrollTop = 0;// #ifdef H5scrollTop = e.target.scrollTop;// #endif// #ifdef MP-WEIXINscrollTop = e.detail.scrollTop;// #endifthis.scrollTop = scrollTop;// 计算透明度，根据滚动距离变化const opacity = Math.min(scrollTop / 100, 1);this.navbarOpacity = opacity;// 超过一定距离后固定导航栏this.navbarFixed = scrollTop > 50;}}
}
</script><style>
.custom-navbar {top: 0;left: 0;right: 0;height: 44px; /* 根据实际调整 */display: flex;align-items: center;padding: 0 15px;z-index: 999;transition: all 0.3s ease;
}.content {height: 100vh;overflow-y: auto;box-sizing: border-box;
}
</style>方案二：使用页面生命周期和onPageScroll
export default {data() {return {navbarOpacity: 0}},onPageScroll(e) {const scrollTop = e.scrollTop;this.navbarOpacity = Math.min(scrollTop / 100, 1);}
}之前我还手搓了一个,实现原理是写了2个header,固定的header开始是透明的,根据滚动使opacity为1,背景颜色也通过滚动实现
<template><view><view style="position: fixed;left: 0;top: 0;width: 100%;z-index: 1111;":style="{ opacity: navbarOpacity,backgroundColor: navBarColor }"><!-- <view style="height: 30rpx;"></view> --><view :style="{height:statusBarHeight+'px'}"></view><view style="height: 82rpx;" class="base-flex-between"><view class="flex-center" style="width: 20%;"><view class="flex-center" style="padding: 0 22rpx 0 30rpx;height: 82rpx;" @click="onBack"><image style="width: 19rpx;height: 33rpx;" src="/static/home/left.png"></image></view></view><view style="width: 60%;font-size: 36rpx;color: #1E2433;font-weight: 600;" class="flex-item-center"><!-- 理财宝 -->个人中心</view><view style="width: 20%;"></view></view></view><view class="headerWrap"><view class="status_bar"></view><view class="d-flex a-center j-sb pr-3" style="height: 88rpx"><view @click="navBack" style="width: 62rpx;padding-left: 24rpx;"><image style="width: 20rpx;" src="/static/home/left.png" mode="widthFix"></image></view><u-icon name="share-square" color="#51b300" size="28"></u-icon></view><view class="px-3"><view class="wrapcneter"><image class="avatarImg" src="/static/test.jpg" mode=""></image><view class="d-flex a-center j-center setimg"><u-icon name="edit-pen" color="#51b300" size="18"></u-icon></view><view class="font-16 font-600" style="margin-top: 120rpx;">用户昵称</view><view class="d-flex a-center mt-2"><view class="btnwrap d-flex a-center"><text class="font-14 font-600 mr-1">15</text><text style="color: #AFAFAF;font-size: 22rpx;">关注</text></view><view class="btnwrap d-flex a-center ml-2"><text class="font-14 font-600 mr-1">15234</text><text style="color: #AFAFAF;font-size: 22rpx;">粉丝</text></view></view><view class="text-two-line w-100 px-3 mt-3" style="font-size: 22rpx;">个人主页介绍个人主页介绍个人主页介绍个人主页介绍个人主页介绍个人主页介绍个人主页介绍个人主页介绍介绍个页个…</view></view></view></view></view>
</template><script>export default {data() {return {navBarColor: 'rgba(188, 237, 0,0)',navbarOpacity: 0, // 透明度}},onReady() {this.getTabItemWidth();},onPageScroll(e) {// 页面滚动时的处理let topHeight = 150;const opacity = 1 - (topHeight - e.scrollTop) / topHeight;// console.log(opacity,'opacity')this.navBarColor = `rgba(188, 237, 0,${opacity})`;let newTop = uni.upx2px(920);let newTop1 = uni.upx2px(1050);let opacity1 = e.scrollTop / newTop1;this.navbarOpacity = Math.min(e.scrollTop / 100, 1);if (e.scrollTop >= newTop) {if (opacity1 > 1) {opacity1 = 1;}this.navBarColorOne = `rgba(188, 237, 0,${opacity1})`;} else {this.navBarColorOne = 'rgba(188, 237, 0,0)';}},methods: {}}
</script><style lang="scss" scoped>.status_bar {height: var(--status-bar-height);// background-color: rgba(255, 255, 255, 0);}.headerWrap {background: url(@/static/assets/mybg.png);background-size: cover;width: 100%;// height: 698rpx;}.wrapcneter {margin-top: 100rpx;width: 690rpx;height: 364rpx;background: rgba(255, 255, 255, 0.51);border-radius: 40rpx;border: 2rpx solid #fff;position: relative;display: flex;flex-direction: column;align-items: center;}.avatarImg {width: 200rpx;height: 200rpx;border-radius: 50%;border: 4rpx solid #fff;position: absolute;top: -27%;z-index: 666;}.setimg {width: 40rpx;height: 40rpx;background-color: #fff;border-radius: 50%;position: absolute;top: 21%;z-index: 777;}.btnwrap {padding: 4rpx 20rpx;background: #E1FB7B;border-radius: 26rpx;}
</style>
