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hello uni-app x
提交 64293b25 编写于 作者: DCloud_JSON's avatar DCloud_JSON
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优化 模板示例scroll-fold-nav的性能 

把头部区域封装成一个组件，在滚动时，直接修改该组件的data里边的scrollTop，这样可以将每次滚动触发的变化范围限定到该组件内
上级 506c9e15
隐藏空白更改
内联 并排
Showing with 192 addition and 173 deletion
pages/template/scroll-fold-nav/scroll-fold-header/scroll-fold-header.uvue 0 → 100644
浏览文件 @ 64293b25
<template>
<view class="top-box" :style="{height:(110 - (scrollTop>40?40:scrollTop) )+'px','background-color': 'rgba(255, 255, 255, '+(scrollTop*3>100?100:scrollTop*3)/100+')'}">
<view class="scroll-fold-nav"
:style="{'opacity': 1 -(scrollTop*3>100?100:scrollTop*3)/100}"
>
<view style="margin-left: 30px;">DCloud 为开发者而生</view>
</view>
<view @click="back" class="back" style="position: absolute;top:35px;left: 8px;">
<image src="/static/template/scroll-fold-nav/back.png" style="width: 20px;" mode="widthFix"></image>
</view>
<view class="search" @click="toSearchPage" :style="{
'width':maxSearchWidth - (scrollTop>40?40:scrollTop) +'rpx',
'top':0 - (scrollTop>40?40:scrollTop) +'px'
}">
<view style="flex-direction: row;">
<image src="/static/template/scroll-fold-nav/search.png" style="width: 15px;" mode="widthFix"></image>
<text class="search-tip-text">请输入你要搜索的内容</text>
</view>
<text class="search-btn">搜索</text>
</view>
</view>
</template>
<script>
export default {
data() {
return {
scrollTop: 0,
maxSearchWidth: 700
}
},
methods: {
toSearchPage(){
this.$emit('toSearchPage')
},
back(){
this.$emit('back')
}
}
}
</script>
<style>
.top-box {
position: fixed;
top: 0;
padding-top: 25px;
align-items: flex-end;
border-bottom: 1px solid #efefef;
}
.scroll-fold-nav {
height: 44px;
width: 750rpx;
justify-content: center;
}
.search {
background-color: #FFFFFF;
border: 1px solid #fbdf0d;
height: 35px;
border-radius: 100px;
margin: 0 25rpx;
padding: 8px;
flex-direction: row;
align-items: center;
justify-content: space-between;
}
.search-tip-text {
font-size: 12px;
color: #666;
}
.search-btn {
font-size: 12px;
background-color: #ff6900;
color: #FFF;
padding: 5px 8px;
border-radius: 100px;
}
</style>
pages/template/scroll-fold-nav/scroll-fold-nav.uvue
浏览文件 @ 64293b25
...@@ -10,120 +10,55 @@ ...@@ -10,120 +10,55 @@
</view> </view>
</view> </view>
</scroll-view> </scroll-view>
<scroll-fold-header ref="header" @back="back" @toSearchPage="toSearchPage()"/>
<view class="top-box" :style="{height:(110 - (scrollTop>40?40:scrollTop) )+'px','background-color': 'rgba(255, 255, 255, '+(scrollTop*3>100?100:scrollTop*3)/100+')'}">
<view class="scroll-fold-nav"
:style="{'opacity': 1 -(scrollTop*3>100?100:scrollTop*3)/100}"
>
<view style="margin-left: 30px;">DCloud 为开发者而生</view>
</view>
<view @click="back" class="back" style="position: absolute;top:35px;left: 8px;">
<image src="/static/template/scroll-fold-nav/back.png" style="width: 20px;" mode="widthFix"></image>
</view>
<view class="search" @click="toSearchPage" :style="{
'width':searchWidth - (scrollTop>40?40:scrollTop) +'rpx',
'top':0 - (scrollTop>40?40:scrollTop) +'px'
}">
<view style="flex-direction: row;">
<image src="/static/template/scroll-fold-nav/search.png" style="width: 15px;" mode="widthFix"></image>
<text class="search-tip-text">请输入你要搜索的内容</text>
</view>
<text class="search-btn">搜索</text>
</view>
</view>
</view> </view>
</template> </template>
<script> <script>
import ScrollEvent from 'io.dcloud.uniapp.runtime.ScrollEvent'; import ScrollEvent from 'io.dcloud.uniapp.runtime.ScrollEvent';
export default { import scrollFoldHeader from './scroll-fold-header/scroll-fold-header.uvue';
export default {
components:{scrollFoldHeader},
data() { data() {
return { return {}
scrollTop: 0,
searchWidth: 700
}
}, },
methods: { methods: {
onScroll(e : ScrollEvent) { onScroll(e : ScrollEvent) {
this.scrollTop = e.detail.scrollTop (this.$refs['header'] as ComponentPublicInstance).$data['scrollTop'] = e.detail.scrollTop
}, },
back(){ back() {
// uni.navigateBack() // 这么写用不了 // uni.navigateBack() // 这么写用不了
// 这么写可以用 // 这么写可以用
uni.navigateBack({ uni.navigateBack({
success(result) { success(result) {
console.log('navigateBack success', result.errMsg) console.log('navigateBack success', result.errMsg)
}, },
fail(error) { fail(error) {
console.log('navigateBack fail', error.errMsg) console.log('navigateBack fail', error.errMsg)
}, },
complete(result) { complete(result) {
console.log('navigateBack complete', result.errMsg) console.log('navigateBack complete', result.errMsg)
}, },
}) })
},
// uni.switchTab({ toSearchPage() {
// url:'/pages/tabBar/template' uni.showToast({
// }) title: '暂不支持',
icon: 'none'
}, });
toSearchPage(){
uni.showToast({
title: '暂不支持',
icon: 'none'
});
} }
}, },
onLoad() { onLoad() {}
}
} }
</script> </script>
<style> <style>
.page { .page {
flex: 1; flex: 1;
background-color: #fbdf0d; background-color: #fbdf0d;
} }
.scroll-view { .scroll-view {
flex: 1; flex: 1;
}
.top-box {
position: fixed;
top: 0;
padding-top: 25px;
align-items: flex-end;
border-bottom: 1px solid #efefef;
}
.scroll-fold-nav {
height: 44px;
width: 750rpx;
justify-content: center;
}
.search {
background-color: #FFFFFF;
border: 1px solid #fbdf0d;
height: 35px;
border-radius: 100px;
margin: 0 25rpx;
padding: 8px;
flex-direction: row;
align-items: center;
justify-content: space-between;
}
.search-tip-text {
font-size: 12px;
color: #666;
}
.search-btn {
font-size: 12px;
background-color: #ff6900;
color: #FFF;
padding: 5px 8px;
border-radius: 100px;
} }
</style> </style>
\ No newline at end of file
pages/template/scroll-fold-nav2/scroll-fold-nav2.uvue
浏览文件 @ 64293b25
...@@ -11,106 +11,106 @@ ...@@ -11,106 +11,106 @@
</view> </view>
</scroll-view> </scroll-view>
<view ref="top-box" class="top-box" style="height:110px;background-color:rgba(255,255,255,0)"> <view ref="top-box" class="top-box" style="height:110px;background-color:rgba(255,255,255,0)">
<view ref="scroll-fold-nav" class="scroll-fold-nav"> <view ref="scroll-fold-nav" class="scroll-fold-nav">
<view style="margin-left: 30px;">DCloud 为开发者而生</view> <view style="margin-left: 30px;">DCloud 为开发者而生</view>
</view> </view>
<view @click="back" class="back" style="position: absolute;top:35px;left: 8px;"> <view @click="back" class="back" style="position: absolute;top:35px;left: 8px;">
<image src="/static/template/scroll-fold-nav/back.png" style="width: 20px;" mode="widthFix"></image> <image src="/static/template/scroll-fold-nav/back.png" style="width: 20px;" mode="widthFix"></image>
</view> </view>
<view ref="search" class="search" @click="toSearchPage" style="width:700rpx;top:0px"> <view ref="search" class="search" @click="toSearchPage" style="width:700rpx;top:0px">
<view style="flex-direction: row;"> <view style="flex-direction: row;">
<image src="/static/template/scroll-fold-nav/search.png" style="width: 15px;" mode="widthFix"></image> <image src="/static/template/scroll-fold-nav/search.png" style="width: 15px;" mode="widthFix"></image>
<text class="search-tip-text">请输入你要搜索的内容</text> <text class="search-tip-text">请输入你要搜索的内容</text>
</view> </view>
<text class="search-btn">搜索</text> <text class="search-btn">搜索</text>
</view> </view>
</view> </view>
</view> </view>
</template> </template>
<script> <script>
import ScrollEvent from 'io.dcloud.uniapp.runtime.ScrollEvent'; import ScrollEvent from 'io.dcloud.uniapp.runtime.ScrollEvent';
export default { export default {
data() { data() {
return { return {
scrollTop: 0, scrollTop: 0,
searchWidth: 700, searchWidth: 700,
searchNode: null as INode|null, searchNode: null as INode | null,
boxNode: null as INode|null, boxNode: null as INode | null,
navNode: null as INode|null navNode: null as INode | null
} }
}, },
methods: { methods: {
onScroll(e : ScrollEvent) { onScroll(e : ScrollEvent) {
let scrollTop = e.detail.scrollTop let scrollTop = e.detail.scrollTop
this.boxNode?.style?.setProperty('height', (110 - (scrollTop>40?40:scrollTop) )+'px'); this.boxNode?.style?.setProperty('height', (110 - (scrollTop > 40 ? 40 : scrollTop)) + 'px');
this.boxNode?.style?.setProperty('background-color', 'rgba(255, 255, 255, '+(scrollTop*3>100?100:scrollTop*3)/100+')'); this.boxNode?.style?.setProperty('background-color', 'rgba(255, 255, 255, ' + (scrollTop * 3 > 100 ? 100 : scrollTop * 3) / 100 + ')');
this.navNode?.style?.setProperty('opacity', 1 - (scrollTop*3>100?100:scrollTop*3)/100.0); this.navNode?.style?.setProperty('opacity', 1 - (scrollTop * 3 > 100 ? 100 : scrollTop * 3) / 100.0);
this.searchNode?.style?.setProperty('width', 700 - (scrollTop>40?40:scrollTop) +'rpx'); this.searchNode?.style?.setProperty('width', 700 - (scrollTop > 40 ? 40 : scrollTop) + 'rpx');
this.searchNode?.style?.setProperty('top', 0 - (scrollTop>40?40:scrollTop) +'px'); this.searchNode?.style?.setProperty('top', 0 - (scrollTop > 40 ? 40 : scrollTop) + 'px');
this.scrollTop = scrollTop; this.scrollTop = scrollTop;
}, },
back(){ back() {
// uni.navigateBack() // 这么写用不了 // uni.navigateBack() // 这么写用不了
// 这么写可以用 // 这么写可以用
uni.navigateBack({ uni.navigateBack({
success(result) { success(result) {
console.log('navigateBack success', result.errMsg) console.log('navigateBack success', result.errMsg)
}, },
fail(error) { fail(error) {
console.log('navigateBack fail', error.errMsg) console.log('navigateBack fail', error.errMsg)
}, },
complete(result) { complete(result) {
console.log('navigateBack complete', result.errMsg) console.log('navigateBack complete', result.errMsg)
}, },
}) })
// uni.switchTab({ // uni.switchTab({
// url:'/pages/tabBar/template' // url:'/pages/tabBar/template'
// }) // })
}, },
toSearchPage(){ toSearchPage() {
uni.showToast({ uni.showToast({
title: '暂不支持', title: '暂不支持',
icon: 'none' icon: 'none'
}); });
} }
}, },
onLoad() { onLoad() {
}, },
onReady() { onReady() {
this.searchNode = this.$refs['search'] as INode; this.searchNode = this.$refs['search'] as INode;
this.boxNode = this.$refs['top-box'] as INode; this.boxNode = this.$refs['top-box'] as INode;
this.navNode = this.$refs['scroll-fold-nav'] as INode; this.navNode = this.$refs['scroll-fold-nav'] as INode;
} }
} }
</script> </script>
<style> <style>
.page { .page {
flex: 1; flex: 1;
background-color: #fbdf0d; background-color: #fbdf0d;
} }
.scroll-view { .scroll-view {
flex: 1; flex: 1;
} }
.top-box { .top-box {
position: fixed; position: fixed;
top: 0; top: 0;
padding-top: 25px; padding-top: 25px;
align-items: flex-end; align-items: flex-end;
border-bottom: 1px solid #efefef; border-bottom: 1px solid #efefef;
} }
.scroll-fold-nav { .scroll-fold-nav {
height: 44px; height: 44px;
width: 750rpx; width: 750rpx;
justify-content: center; justify-content: center;
} }
.search { .search {
...@@ -118,21 +118,23 @@ ...@@ -118,21 +118,23 @@
border: 1px solid #fbdf0d; border: 1px solid #fbdf0d;
height: 35px; height: 35px;
border-radius: 100px; border-radius: 100px;
margin: 0 25rpx; margin: 0 25rpx;
padding: 8px; padding: 8px;
flex-direction: row; flex-direction: row;
align-items: center; align-items: center;
justify-content: space-between; justify-content: space-between;
} }
.search-tip-text {
font-size: 12px; .search-tip-text {
color: #666; font-size: 12px;
} color: #666;
.search-btn { }
font-size: 12px;
background-color: #ff6900; .search-btn {
color: #FFF; font-size: 12px;
padding: 5px 8px; background-color: #ff6900;
border-radius: 100px; color: #FFF;
padding: 5px 8px;
border-radius: 100px;
} }
</style> </style>
\ No newline at end of file
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