161 lines
5.2 KiB
Vue
161 lines
5.2 KiB
Vue
<template>
|
||
<!-- #ifdef APP-NVUE -->
|
||
<list
|
||
class="u-list"
|
||
:enableBackToTop="enableBackToTop"
|
||
:loadmoreoffset="lowerThreshold"
|
||
:showScrollbar="showScrollbar"
|
||
:style="[listStyle]"
|
||
:offset-accuracy="Number(offsetAccuracy)"
|
||
@scroll="onScroll"
|
||
@loadmore="scrolltolower"
|
||
>
|
||
<slot />
|
||
</list>
|
||
<!-- #endif -->
|
||
<!-- #ifndef APP-NVUE -->
|
||
<scroll-view
|
||
class="u-list"
|
||
:scroll-into-view="scrollIntoView"
|
||
:style="[listStyle]"
|
||
:scroll-y="scrollable"
|
||
:scroll-top="Number(scrollTop)"
|
||
:lower-threshold="Number(lowerThreshold)"
|
||
:upper-threshold="Number(upperThreshold)"
|
||
:show-scrollbar="showScrollbar"
|
||
:enable-back-to-top="enableBackToTop"
|
||
:scroll-with-animation="scrollWithAnimation"
|
||
@scroll="onScroll"
|
||
@scrolltolower="scrolltolower"
|
||
@scrolltoupper="scrolltoupper"
|
||
>
|
||
<view>
|
||
<slot />
|
||
</view>
|
||
</scroll-view>
|
||
<!-- #endif -->
|
||
</template>
|
||
|
||
<script>
|
||
import props from './props';
|
||
import mpMixin from '../../libs/mixin/mpMixin';
|
||
import mixin from '../../libs/mixin/mixin';
|
||
import { addUnit, addStyle, deepMerge, sleep, sys } from '../../libs/function/index';
|
||
// #ifdef APP-NVUE
|
||
const dom = uni.requireNativePlugin('dom')
|
||
// #endif
|
||
/**
|
||
* List 列表
|
||
* @description 该组件为高性能列表组件
|
||
* @tutorial https://ijry.github.io/uview-plus/components/list.html
|
||
* @property {Boolean} showScrollbar 控制是否出现滚动条,仅nvue有效 (默认 false )
|
||
* @property {String | Number} lowerThreshold 距底部多少时触发scrolltolower事件 (默认 50 )
|
||
* @property {String | Number} upperThreshold 距顶部多少时触发scrolltoupper事件,非nvue有效 (默认 0 )
|
||
* @property {String | Number} scrollTop 设置竖向滚动条位置(默认 0 )
|
||
* @property {String | Number} offsetAccuracy 控制 onscroll 事件触发的频率,仅nvue有效(默认 10 )
|
||
* @property {Boolean} enableFlex 启用 flexbox 布局。开启后,当前节点声明了display: flex就会成为flex container,并作用于其孩子节点,仅微信小程序有效(默认 false )
|
||
* @property {Boolean} pagingEnabled 是否按分页模式显示List,(默认 false )
|
||
* @property {Boolean} scrollable 是否允许List滚动(默认 true )
|
||
* @property {String} scrollIntoView 值应为某子元素id(id不能以数字开头)
|
||
* @property {Boolean} scrollWithAnimation 在设置滚动条位置时使用动画过渡 (默认 false )
|
||
* @property {Boolean} enableBackToTop iOS点击顶部状态栏、安卓双击标题栏时,滚动条返回顶部,只对微信小程序有效 (默认 false )
|
||
* @property {String | Number} height 列表的高度 (默认 0 )
|
||
* @property {String | Number} width 列表宽度 (默认 0 )
|
||
* @property {String | Number} preLoadScreen 列表前后预渲染的屏数,1代表一个屏幕的高度,1.5代表1个半屏幕高度 (默认 1 )
|
||
* @property {Object} customStyle 定义需要用到的外部样式
|
||
*
|
||
* @example <u-list @scrolltolower="scrolltolower"></u-list>
|
||
*/
|
||
export default {
|
||
name: 'u-list',
|
||
mixins: [mpMixin, mixin, props],
|
||
watch: {
|
||
scrollIntoView(n) {
|
||
this.scrollIntoViewById(n)
|
||
}
|
||
},
|
||
data() {
|
||
return {
|
||
// 记录内部滚动的距离
|
||
innerScrollTop: 0,
|
||
// vue下,scroll-view在上拉加载时的偏移值
|
||
offset: 0,
|
||
sys: sys()
|
||
}
|
||
},
|
||
computed: {
|
||
listStyle() {
|
||
const style = {};
|
||
if (this.width != 0) style.width = addUnit(this.width)
|
||
if (this.height != 0) style.height = addUnit(this.height)
|
||
// 如果没有定义列表高度,则默认使用屏幕高度
|
||
if (!style.height) style.height = addUnit(this.sys.windowHeight, 'px')
|
||
return deepMerge(style, addStyle(this.customStyle))
|
||
}
|
||
},
|
||
provide() {
|
||
return {
|
||
uList: this
|
||
}
|
||
},
|
||
created() {
|
||
this.refs = []
|
||
this.children = []
|
||
this.anchors = []
|
||
},
|
||
mounted() {},
|
||
emits: ["scroll", "scrolltolower", "scrolltoupper"],
|
||
methods: {
|
||
updateOffsetFromChild(top) {
|
||
this.offset = top
|
||
},
|
||
onScroll(e) {
|
||
let scrollTop = 0
|
||
// #ifdef APP-NVUE
|
||
scrollTop = e.contentOffset.y
|
||
// #endif
|
||
// #ifndef APP-NVUE
|
||
scrollTop = e.detail.scrollTop
|
||
// #endif
|
||
this.innerScrollTop = scrollTop
|
||
this.$emit('scroll', Math.abs(scrollTop))
|
||
},
|
||
scrollIntoViewById(id) {
|
||
// #ifdef APP-NVUE
|
||
// 根据id参数,找到所有u-list-item中匹配的节点,再通过dom模块滚动到对应的位置
|
||
const item = this.refs.find(item => item.$refs[id] ? true : false)
|
||
dom.scrollToElement(item.$refs[id], {
|
||
// 是否需要滚动动画
|
||
animated: this.scrollWithAnimation
|
||
})
|
||
// #endif
|
||
},
|
||
// 滚动到底部触发事件
|
||
scrolltolower(e) {
|
||
sleep(30).then(() => {
|
||
this.$emit('scrolltolower')
|
||
})
|
||
},
|
||
// #ifndef APP-NVUE
|
||
// 滚动到底部时触发,非nvue有效
|
||
scrolltoupper(e) {
|
||
sleep(30).then(() => {
|
||
this.$emit('scrolltoupper')
|
||
// 这一句很重要,能绝对保证在性功能障碍的webview,滚动条到顶时,取消偏移值,让页面置顶
|
||
this.offset = 0
|
||
})
|
||
}
|
||
// #endif
|
||
},
|
||
}
|
||
</script>
|
||
|
||
<style lang="scss" scoped>
|
||
@import "../../libs/css/components.scss";
|
||
|
||
.u-list {
|
||
@include flex(column);
|
||
|
||
}
|
||
</style>
|