上篇,我们实现了一个公用组件画廊组件。本篇,我们将实现 详情页面 Header 的渐隐渐现效果。
首先,创建一个detail-header 分支,pull 下来,在新分支上写代码。
主要效果就是,当页面的scroll 是顶部的时候,页面的 顶部会显示返回的标志。当banner 被滑动到视口之外,就显示标准的背景色加title 的header。
首先在,pages/deteil/ components 目录下,创建文件 Header.vue ,给Header.vue 初始化,如下。
<template>
<div>header</div>
</template>
<script>
export default {
name: 'DetailHeader'
}
</script>
<style lang="stylus" scoped="">
</style>
在Detail.vue 中引入,如下。
<template>
<div>
<detail-banner></detail-banner>
<detail-header></detail-header>
</div>
</template>
<script>
import DetailHeader from './components/Header'
import DetailBanner from './components/Banner'
export default {
name: 'Detail',
components: {
DetailBanner,
DetailHeader
}
}
</script>
<style lang="stylus" scoped>
</style>
好了。下面,我们做好了,header 返回首页按钮样式,如下。
<template>
<div>
<div class="header-abs">
<div class="iconfont header-abs-back"></div>
</div>
<div class="header-fixed"></div>
</div>
</template>
<script>
export default {
name: 'DetailHeader'
}
</script>
<style lang="stylus" scoped="">
.header-abs
position: absolute
left: .2rem
top: .2rem
width: .8rem
height: .8rem
text-align: center
line-height: .8rem
border-radius: .8rem
background: rgba(0, 0, 0, .8)
.header-abs-back
color: #fff
</style>
然后,点击这个按钮,会进入首页,如下。
<template>
<div>
<router-link tag="div" to="/" class="header-abs">
<div class="iconfont header-abs-back"></div>
</router-link>
<div class="header-fixed"></div>
</div>
</template>
<script>
export default {
name: 'DetailHeader'
}
</script>
<style lang="stylus" scoped="">
.header-abs
position: absolute
left: .2rem
top: .2rem
width: .8rem
height: .8rem
text-align: center
line-height: .8rem
border-radius: .8rem
background: rgba(0, 0, 0, .8)
.header-abs-back
color: #fff
</style>
然后,写出来正常的header 样式,如下。
<template>
<div>
<router-link tag="div" to="/" class="header-abs">
<div class="iconfont header-abs-back"></div>
</router-link>
<div class="header-fixed">
<router-link tag="div" to="/">
<div class="iconfont header-fixed-back"></div>
</router-link>
景点详情
</div>
</div>
</template>
<script>
export default {
name: 'DetailHeader'
}
</script>
<style lang="stylus" scoped="">
@import '~styles/variables.styl'
.header-abs
position: absolute
left: .2rem
top: .2rem
width: .8rem
height: .8rem
text-align: center
line-height: .8rem
border-radius: .8rem
background: rgba(0, 0, 0, .8)
.header-abs-back
color: #fff
.header-fixed
position: fixed
top: 0
left: 0
right: 0
height: .86rem
line-height: .86rem
text-align: center
color: #fff
background: $bgColor
font-size: .32rem
.header-fixed-back
position: absolute
top: 0
left: 0
width: .64rem
text-align: center
font-size: .4rem
color: #fff
</style>
好啦,下面来写业务逻辑了。
<template>
<div>
<router-link
tag="div"
to="/"
class="header-abs"
v-show="showAbs"
>
<div class="iconfont header-abs-back"></div>
</router-link>
<div class="header-fixed" v-show="!showAbs">
<router-link tag="div" to="/">
<div class="iconfont header-fixed-back"></div>
</router-link>
景点详情
</div>
</div>
</template>
<script>
export default {
name: 'DetailHeader',
data () {
return {
showAbs: true
}
},
methods: {
handleScroll () {
const top = document.documentElement.scrollTop
if (top > 60) {
this.showAbs = false
} else {
this.showAbs = true
}
}
},
activated () {
window.addEventListener('scroll', this.handleScroll)
}
}
</script>
<style lang="stylus" scoped="">
@import '~styles/variables.styl'
.header-abs
position: absolute
left: .2rem
top: .2rem
width: .8rem
height: .8rem
text-align: center
line-height: .8rem
border-radius: .8rem
background: rgba(0, 0, 0, .8)
.header-abs-back
color: #fff
.header-fixed
position: fixed
top: 0
left: 0
right: 0
height: .86rem
line-height: .86rem
text-align: center
color: #fff
background: $bgColor
font-size: .32rem
.header-fixed-back
position: absolute
top: 0
left: 0
width: .64rem
text-align: center
font-size: .4rem
color: #fff
</style>
好啦,基本功能实现了,下面来实现渐隐渐现效果。
<template>
<div>
<router-link
tag="div"
to="/"
class="header-abs"
v-show="showAbs"
>
<div class="iconfont header-abs-back"></div>
</router-link>
<div
class="header-fixed"
v-show="!showAbs"
:style="opacityStyle"
>
<router-link tag="div" to="/">
<div class="iconfont header-fixed-back"></div>
</router-link>
景点详情
</div>
</div>
</template>
<script>
export default {
name: 'DetailHeader',
data () {
return {
showAbs: true,
opacityStyle: {
opacity: 0
}
}
},
methods: {
handleScroll () {
const top = document.documentElement.scrollTop
if (top > 60) {
let opacity = top / 140
opacity = opacity > 1 ? 1 : opacity
this.opacityStyle = { opacity }
this.showAbs = false
} else {
this.showAbs = true
}
}
},
activated () {
window.addEventListener('scroll', this.handleScroll)
}
}
</script>
<style lang="stylus" scoped="">
@import '~styles/variables.styl'
.header-abs
position: absolute
left: .2rem
top: .2rem
width: .8rem
height: .8rem
text-align: center
line-height: .8rem
border-radius: .8rem
background: rgba(0, 0, 0, .8)
.header-abs-back
color: #fff
.header-fixed
position: fixed
top: 0
left: 0
right: 0
height: .86rem
line-height: .86rem
text-align: center
color: #fff
background: $bgColor
font-size: .32rem
.header-fixed-back
position: absolute
top: 0
left: 0
width: .64rem
text-align: center
font-size: .4rem
color: #fff
</style>
Done!
可以提交合并代码啦。