uni-app引入使用uView

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sfmind
2022-04-06 16:08:26 +08:00
parent 9ae44336db
commit 9709f200c2
386 changed files with 38777 additions and 0 deletions

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// 引入bindingx此库类似于微信小程序wxs目的是让js运行在视图层减少视图层和逻辑层的通信折损
const BindingX = uni.requireNativePlugin('bindingx')
export default {
methods: {
// 此处不写注释,请自行体会
nvueScrollHandler(e) {
const anchor = this.$refs['u-scroll-list__scroll-view'].ref
const element = this.$refs['u-scroll-list__indicator__line__bar'].ref
const scrollLeft = e.contentOffset.x
const contentSize = e.contentSize.width
const { scrollWidth } = this
const barAllMoveWidth = this.indicatorWidth - this.indicatorBarWidth
// 在安卓和iOS上需要除的倍数不一样iOS需要除以2
const actionNum = uni.$u.os() === 'ios' ? 2 : 1
const expression = `(x / ${actionNum}) / ${contentSize - scrollWidth} * ${barAllMoveWidth}`
BindingX.bind({
anchor,
eventType: 'scroll',
props: [{
element,
property: 'transform.translateX',
expression
}]
})
}
}
}

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export default {
props: {
// 指示器的整体宽度
indicatorWidth: {
type: [String, Number],
default: uni.$u.props.scrollList.indicatorWidth
},
// 滑块的宽度
indicatorBarWidth: {
type: [String, Number],
default: uni.$u.props.scrollList.indicatorBarWidth
},
// 是否显示面板指示器
indicator: {
type: Boolean,
default: uni.$u.props.scrollList.indicator
},
// 指示器非激活颜色
indicatorColor: {
type: String,
default: uni.$u.props.scrollList.indicatorColor
},
// 指示器的激活颜色
indicatorActiveColor: {
type: String,
default: uni.$u.props.scrollList.indicatorActiveColor
},
// 指示器样式可通过bottomleftright进行定位
indicatorStyle: {
type: [String, Object],
default: uni.$u.props.scrollList.indicatorStyle
}
}
}

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function scroll(event, ownerInstance) {
// detail中含有scroll-view的信息比如scroll-view的实际宽度当前时间点scroll-view的移动距离等
var detail = event.detail
var scrollWidth = detail.scrollWidth
var scrollLeft = detail.scrollLeft
// 获取当前组件的dataset说白了就是祸国殃民的腾xun搞出来的垃ji
var dataset = event.currentTarget.dataset
// 此为scroll-view外部包裹元素的宽度
// 某些HX版本(3.1.18)发现view元素中大写的data-scrollWidth在wxs中变成了全部小写所以这里需要特别处理
var scrollComponentWidth = dataset.scrollWidth || dataset.scrollwidth || 0
// 指示器和滑块的宽度
var indicatorWidth = dataset.indicatorWidth || dataset.indicatorwidth || 0
var barWidth = dataset.barWidth || dataset.barwidth || 0
// 此处的计算理由为scroll-view的滚动距离与目标滚动距离(scroll-view的实际宽度减去包裹元素的宽度)之比,等于滑块当前移动距离与总需
// 滑动距离(指示器的总宽度减去滑块宽度)的比值
var x = scrollLeft / (scrollWidth - scrollComponentWidth) * (indicatorWidth - barWidth)
setBarStyle(ownerInstance, x)
}
// 由于webview的无能无法保证scroll-view在滑动过程中一直触发scroll事件会导致
// 无法监听到某些滚动值,当在首尾临界值无法监听到时,这是致命的,因为错失这些值会导致滑块无法回到起点和终点
// 所以这里需要对临界值做监听并处理
function scrolltolower(event, ownerInstance) {
ownerInstance.callMethod('scrollEvent', 'right')
// 获取当前组件的dataset
var dataset = event.currentTarget.dataset
// 指示器和滑块的宽度
var indicatorWidth = dataset.indicatorWidth || dataset.indicatorwidth || 0
var barWidth = dataset.barWidth || dataset.barwidth || 0
// scroll-view滚动到右边终点时将滑块也设置为到右边的终点它所需移动的距离为指示器宽度 - 滑块宽度
setBarStyle(ownerInstance, indicatorWidth - barWidth)
}
function scrolltoupper(event, ownerInstance) {
ownerInstance.callMethod('scrollEvent', 'left')
// 滚动到左边时将滑块设置为0的偏移距离回到起点
setBarStyle(ownerInstance, 0)
}
function setBarStyle(ownerInstance, x) {
ownerInstance.selectComponent('.u-scroll-list__indicator__line__bar') && ownerInstance.selectComponent('.u-scroll-list__indicator__line__bar').setStyle({
transform: 'translateX(' + x + 'px)'
})
}
module.exports = {
scroll: scroll,
scrolltolower: scrolltolower,
scrolltoupper: scrolltoupper
}

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<template>
<view
class="u-scroll-list"
ref="u-scroll-list"
>
<!-- #ifdef APP-NVUE -->
<!-- nvue使用bindingX实现以得到更好的性能 -->
<scroller
class="u-scroll-list__scroll-view"
ref="u-scroll-list__scroll-view"
scroll-direction="horizontal"
:show-scrollbar="false"
:offset-accuracy="1"
@scroll="nvueScrollHandler"
>
<view class="u-scroll-list__scroll-view__content">
<slot />
</view>
</scroller>
<!-- #endif -->
<!-- #ifndef APP-NVUE -->
<!-- #ifdef MP-WEIXIN || APP-VUE || H5 || MP-QQ -->
<!-- 以上平台支持wxs -->
<scroll-view
class="u-scroll-list__scroll-view"
scroll-x
@scroll="wxs.scroll"
@scrolltoupper="wxs.scrolltoupper"
@scrolltolower="wxs.scrolltolower"
:data-scrollWidth="scrollWidth"
:data-barWidth="$u.getPx(indicatorBarWidth)"
:data-indicatorWidth="$u.getPx(indicatorWidth)"
:show-scrollbar="false"
:upper-threshold="0"
:lower-threshold="0"
>
<!-- #endif -->
<!-- #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ -->
<!-- 非以上平台只能使用普通js实现 -->
<scroll-view
class="u-scroll-list__scroll-view"
scroll-x
@scroll="scrollHandler"
@scrolltoupper="scrolltoupperHandler"
@scrolltolower="scrolltolowerHandler"
:show-scrollbar="false"
:upper-threshold="0"
:lower-threshold="0"
>
<!-- #endif -->
<view class="u-scroll-list__scroll-view__content">
<slot />
</view>
</scroll-view>
<!-- #endif -->
<view
class="u-scroll-list__indicator"
v-if="indicator"
:style="[$u.addStyle(indicatorStyle)]"
>
<view
class="u-scroll-list__indicator__line"
:style="[lineStyle]"
>
<view
class="u-scroll-list__indicator__line__bar"
:style="[barStyle]"
ref="u-scroll-list__indicator__line__bar"
></view>
</view>
</view>
</view>
</template>
<!-- #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ -->
<script
src="./scrollWxs.wxs"
module="wxs"
lang="wxs"
></script>
<!-- #endif -->
<script>
/**
* scrollList 横向滚动列表
* @description 该组件一般用于同时展示多个商品、分类的场景,也可以完成左右滑动的列表。
* @tutorial https://www.uviewui.com/components/scrollList.html
* @property {String | Number} indicatorWidth 指示器的整体宽度 (默认 50 )
* @property {String | Number} indicatorBarWidth 滑块的宽度 (默认 20 )
* @property {Boolean} indicator 是否显示面板指示器 (默认 true )
* @property {String} indicatorColor 指示器非激活颜色 (默认 '#f2f2f2' )
* @property {String} indicatorActiveColor 指示器的激活颜色 (默认 '#3c9cff' )
* @property {String | Object} indicatorStyle 指示器样式可通过bottomleftright进行定位
* @event {Function} left 滑动到左边时触发
* @event {Function} right 滑动到右边时触发
* @example
*/
// #ifdef APP-NVUE
const dom = uni.requireNativePlugin('dom')
import nvueMixin from "./nvue.js"
// #endif
import props from './props.js';
export default {
name: 'u-scroll-list',
mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
// #ifdef APP-NVUE
mixins: [uni.$u.mpMixin, uni.$u.mixin, nvueMixin, props],
// #endif
data() {
return {
scrollInfo: {
scrollLeft: 0,
scrollWidth: 0
},
scrollWidth: 0
}
},
computed: {
// 指示器为线型的样式
barStyle() {
const style = {}
// #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ
// 此为普通js方案只有在非nvue和不支持wxs方案的端才使用、
// 此处的计算理由为scroll-view的滚动距离与目标滚动距离(scroll-view的实际宽度减去包裹元素的宽度)之比,等于滑块当前移动距离与总需
// 滑动距离(指示器的总宽度减去滑块宽度)的比值
const scrollLeft = this.scrollInfo.scrollLeft,
scrollWidth = this.scrollInfo.scrollWidth,
barAllMoveWidth = this.indicatorWidth - this.indicatorBarWidth
const x = scrollLeft / (scrollWidth - this.scrollWidth) * barAllMoveWidth
style.transform = `translateX(${ x }px)`
// #endif
// 设置滑块的宽度和背景色,是每个平台都需要的
style.width = uni.$u.addUnit(this.indicatorBarWidth)
style.backgroundColor = this.indicatorActiveColor
return style
},
lineStyle() {
const style = {}
// 指示器整体的样式,需要设置其宽度和背景色
style.width = uni.$u.addUnit(this.indicatorWidth)
style.backgroundColor = this.indicatorColor
return style
}
},
mounted() {
this.init()
},
methods: {
init() {
this.getComponentWidth()
},
// #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ
// scroll-view触发滚动事件
scrollHandler(e) {
this.scrollInfo = e.detail
},
scrolltoupperHandler() {
this.scrollEvent('left')
this.scrollInfo.scrollLeft = 0
},
scrolltolowerHandler() {
this.scrollEvent('right')
// 在普通js方案中滚动到右边时通过设置this.scrollInfo模拟出滚动到右边的情况
// 因为上方是用过computed计算的设置后会自动调整滑块的位置
this.scrollInfo.scrollLeft = uni.$u.getPx(this.indicatorWidth) - uni.$u.getPx(this.indicatorBarWidth)
},
// #endif
//
scrollEvent(status) {
this.$emit(status)
},
// 获取组件的宽度
async getComponentWidth() {
// 延时一定时间以获取dom尺寸
await uni.$u.sleep(30)
// #ifndef APP-NVUE
this.$uGetRect('.u-scroll-list').then(size => {
this.scrollWidth = size.width
})
// #endif
// #ifdef APP-NVUE
const ref = this.$refs['u-scroll-list']
ref && dom.getComponentRect(ref, (res) => {
this.scrollWidth = res.size.width
})
// #endif
},
}
}
</script>
<style lang="scss" scoped>
@import "../../libs/css/components.scss";
.u-scroll-list {
padding-bottom: 10px;
&__scroll-view {
@include flex;
&__content {
@include flex;
}
}
&__indicator {
@include flex;
justify-content: center;
margin-top: 15px;
&__line {
width: 60px;
height: 4px;
border-radius: 100px;
overflow: hidden;
&__bar {
width: 20px;
height: 4px;
border-radius: 100px;
}
}
}
}
</style>