359 lines
11 KiB
Vue
359 lines
11 KiB
Vue
<template>
|
||
<view class="u-tabs">
|
||
<view class="u-tabs__wrapper">
|
||
<slot name="left" />
|
||
<view class="u-tabs__wrapper__scroll-view-wrapper">
|
||
<scroll-view
|
||
:scroll-x="scrollable"
|
||
:scroll-left="scrollLeft"
|
||
scroll-with-animation
|
||
class="u-tabs__wrapper__scroll-view"
|
||
:show-scrollbar="false"
|
||
ref="u-tabs__wrapper__scroll-view"
|
||
>
|
||
<view
|
||
class="u-tabs__wrapper__nav"
|
||
ref="u-tabs__wrapper__nav"
|
||
>
|
||
<view
|
||
class="u-tabs__wrapper__nav__item"
|
||
v-for="(item, index) in list"
|
||
:key="index"
|
||
@tap="clickHandler(item, index)"
|
||
:ref="`u-tabs__wrapper__nav__item-${index}`"
|
||
:style="[$u.addStyle(itemStyle), {flex: scrollable ? '' : 1}]"
|
||
:class="[`u-tabs__wrapper__nav__item-${index}`, item.disabled && 'u-tabs__wrapper__nav__item--disabled']"
|
||
>
|
||
<text
|
||
:class="[item.disabled && 'u-tabs__wrapper__nav__item__text--disabled']"
|
||
class="u-tabs__wrapper__nav__item__text"
|
||
:style="[textStyle(index)]"
|
||
>{{ item[keyName] }}</text>
|
||
<u-badge
|
||
:show="!!(item.badge && (item.badge.show || item.badge.isDot || item.badge.value))"
|
||
:isDot="item.badge && item.badge.isDot || propsBadge.isDot"
|
||
:value="item.badge && item.badge.value || propsBadge.value"
|
||
:max="item.badge && item.badge.max || propsBadge.max"
|
||
:type="item.badge && item.badge.type || propsBadge.type"
|
||
:showZero="item.badge && item.badge.showZero || propsBadge.showZero"
|
||
:bgColor="item.badge && item.badge.bgColor || propsBadge.bgColor"
|
||
:color="item.badge && item.badge.color || propsBadge.color"
|
||
:shape="item.badge && item.badge.shape || propsBadge.shape"
|
||
:numberType="item.badge && item.badge.numberType || propsBadge.numberType"
|
||
:inverted="item.badge && item.badge.inverted || propsBadge.inverted"
|
||
customStyle="margin-left: 4px;"
|
||
></u-badge>
|
||
</view>
|
||
<!-- #ifdef APP-NVUE -->
|
||
<view
|
||
class="u-tabs__wrapper__nav__line"
|
||
ref="u-tabs__wrapper__nav__line"
|
||
:style="[{
|
||
width: $u.addUnit(lineWidth),
|
||
height: $u.addUnit(lineHeight),
|
||
background: lineColor,
|
||
backgroundSize: lineBgSize,
|
||
}]"
|
||
>
|
||
</view>
|
||
<!-- #endif -->
|
||
<!-- #ifndef APP-NVUE -->
|
||
<view
|
||
class="u-tabs__wrapper__nav__line"
|
||
ref="u-tabs__wrapper__nav__line"
|
||
:style="[{
|
||
width: $u.addUnit(lineWidth),
|
||
transform: `translate(${lineOffsetLeft}px)`,
|
||
transitionDuration: `${firstTime ? 0 : duration}ms`,
|
||
height: $u.addUnit(lineHeight),
|
||
background: lineColor,
|
||
backgroundSize: lineBgSize,
|
||
}]"
|
||
>
|
||
</view>
|
||
<!-- #endif -->
|
||
</view>
|
||
</scroll-view>
|
||
</view>
|
||
<slot name="right" />
|
||
</view>
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
// #ifdef APP-NVUE
|
||
const animation = uni.requireNativePlugin('animation')
|
||
const dom = uni.requireNativePlugin('dom')
|
||
// #endif
|
||
import props from './props.js';
|
||
import mpMixin from '../../libs/mixin/mpMixin.js';
|
||
import mixin from '../../libs/mixin/mixin.js';
|
||
/**
|
||
* Tabs 标签
|
||
* @description tabs标签组件，在标签多的时候，可以配置为左右滑动，标签少的时候，可以禁止滑动。 该组件的一个特点是配置为滚动模式时，激活的tab会自动移动到组件的中间位置。
|
||
* @tutorial https://ijry.github.io/uview-plus/components/tabs.html
|
||
* @property {String | Number} duration 滑块移动一次所需的时间，单位秒（默认 200 ）
|
||
* @property {String | Number} swierWidth swiper的宽度（默认 '750rpx' ）
|
||
* @property {String} keyName 从`list`元素对象中读取的键名（默认 'name' ）
|
||
* @event {Function(index)} change 标签改变时触发 index: 点击了第几个tab，索引从0开始
|
||
* @event {Function(index)} click 点击标签时触发 index: 点击了第几个tab，索引从0开始
|
||
* @example <u-tabs :list="list" :is-scroll="false" :current="current" @change="change"></u-tabs>
|
||
*/
|
||
export default {
|
||
name: 'u-tabs',
|
||
mixins: [mpMixin, mixin, props],
|
||
data() {
|
||
return {
|
||
firstTime: true,
|
||
scrollLeft: 0,
|
||
scrollViewWidth: 0,
|
||
lineOffsetLeft: 0,
|
||
tabsRect: {
|
||
left: 0
|
||
},
|
||
innerCurrent: 0,
|
||
moving: false,
|
||
}
|
||
},
|
||
watch: {
|
||
current: {
|
||
immediate: true,
|
||
handler (newValue, oldValue) {
|
||
// 内外部值不相等时，才尝试移动滑块
|
||
if (newValue !== this.innerCurrent) {
|
||
this.innerCurrent = newValue
|
||
this.$nextTick(() => {
|
||
this.resize()
|
||
})
|
||
}
|
||
}
|
||
},
|
||
// list变化时，重新渲染list各项信息
|
||
list() {
|
||
this.$nextTick(() => {
|
||
this.resize()
|
||
})
|
||
}
|
||
},
|
||
computed: {
|
||
textStyle() {
|
||
return index => {
|
||
const style = {}
|
||
// 取当期是否激活的样式
|
||
const customeStyle = index === this.innerCurrent ? uni.$u.addStyle(this.activeStyle) : uni.$u
|
||
.addStyle(
|
||
this.inactiveStyle)
|
||
// 如果当前菜单被禁用，则加上对应颜色，需要在此做处理，是因为nvue下，无法在style样式中通过!import覆盖标签的内联样式
|
||
if (this.list[index].disabled) {
|
||
style.color = '#c8c9cc'
|
||
}
|
||
return uni.$u.deepMerge(customeStyle, style)
|
||
}
|
||
},
|
||
propsBadge() {
|
||
return uni.$u.props.badge
|
||
}
|
||
},
|
||
async mounted() {
|
||
this.init()
|
||
},
|
||
emits: ['click', 'change'],
|
||
methods: {
|
||
setLineLeft() {
|
||
const tabItem = this.list[this.innerCurrent];
|
||
if (!tabItem) {
|
||
return;
|
||
}
|
||
// 获取滑块该移动的位置
|
||
let lineOffsetLeft = this.list
|
||
.slice(0, this.innerCurrent)
|
||
.reduce((total, curr) => total + curr.rect.width, 0);
|
||
// 获取下划线的数值px表示法
|
||
const lineWidth = uni.$u.getPx(this.lineWidth);
|
||
this.lineOffsetLeft = lineOffsetLeft + (tabItem.rect.width - lineWidth) / 2
|
||
// #ifdef APP-NVUE
|
||
// 第一次移动滑块，无需过渡时间
|
||
this.animation(this.lineOffsetLeft, this.firstTime ? 0 : parseInt(this.duration))
|
||
// #endif
|
||
|
||
// 如果是第一次执行此方法，让滑块在初始化时，瞬间滑动到第一个tab item的中间
|
||
// 这里需要一个定时器，因为在非nvue下，是直接通过style绑定过渡时间，需要等其过渡完成后，再设置为false(非第一次移动滑块)
|
||
if (this.firstTime) {
|
||
setTimeout(() => {
|
||
this.firstTime = false
|
||
}, 10);
|
||
}
|
||
},
|
||
// nvue下设置滑块的位置
|
||
animation(x, duration = 0) {
|
||
// #ifdef APP-NVUE
|
||
const ref = this.$refs['u-tabs__wrapper__nav__line']
|
||
animation.transition(ref, {
|
||
styles: {
|
||
transform: `translateX(${x}px)`
|
||
},
|
||
duration
|
||
})
|
||
// #endif
|
||
},
|
||
// 点击某一个标签
|
||
clickHandler(item, index) {
|
||
// 因为标签可能为disabled状态，所以click是一定会发出的，但是change事件是需要可用的状态才发出
|
||
this.$emit('click', {
|
||
...item,
|
||
index
|
||
})
|
||
// 如果disabled状态，返回
|
||
if (item.disabled) return
|
||
this.innerCurrent = index
|
||
this.resize()
|
||
this.$emit('change', {
|
||
...item,
|
||
index
|
||
})
|
||
},
|
||
init() {
|
||
uni.$u.sleep().then(() => {
|
||
this.resize()
|
||
})
|
||
},
|
||
setScrollLeft() {
|
||
// 当前活动tab的布局信息，有tab菜单的width和left(为元素左边界到父元素左边界的距离)等信息
|
||
const tabRect = this.list[this.innerCurrent]
|
||
// 累加得到当前item到左边的距离
|
||
const offsetLeft = this.list
|
||
.slice(0, this.innerCurrent)
|
||
.reduce((total, curr) => {
|
||
return total + curr.rect.width
|
||
}, 0)
|
||
// 此处为屏幕宽度
|
||
const windowWidth = uni.$u.sys().windowWidth
|
||
// 将活动的tabs-item移动到屏幕正中间，实际上是对scroll-view的移动
|
||
let scrollLeft = offsetLeft - (this.tabsRect.width - tabRect.rect.width) / 2 - (windowWidth - this.tabsRect
|
||
.right) / 2 + this.tabsRect.left / 2
|
||
// 这里做一个限制，限制scrollLeft的最大值为整个scroll-view宽度减去tabs组件的宽度
|
||
scrollLeft = Math.min(scrollLeft, this.scrollViewWidth - this.tabsRect.width)
|
||
this.scrollLeft = Math.max(0, scrollLeft)
|
||
},
|
||
// 获取所有标签的尺寸
|
||
resize() {
|
||
// 如果不存在list，则不处理
|
||
if(this.list.length === 0) {
|
||
return
|
||
}
|
||
Promise.all([this.getTabsRect(), this.getAllItemRect()]).then(([tabsRect, itemRect = []]) => {
|
||
this.tabsRect = tabsRect
|
||
this.scrollViewWidth = 0
|
||
itemRect.map((item, index) => {
|
||
// 计算scroll-view的宽度，这里
|
||
this.scrollViewWidth += item.width
|
||
// 另外计算每一个item的中心点X轴坐标
|
||
this.list[index].rect = item
|
||
})
|
||
// 获取了tabs的尺寸之后，设置滑块的位置
|
||
this.setLineLeft()
|
||
this.setScrollLeft()
|
||
})
|
||
},
|
||
// 获取导航菜单的尺寸
|
||
getTabsRect() {
|
||
return new Promise(resolve => {
|
||
this.queryRect('u-tabs__wrapper__scroll-view').then(size => resolve(size))
|
||
})
|
||
},
|
||
// 获取所有标签的尺寸
|
||
getAllItemRect() {
|
||
return new Promise(resolve => {
|
||
const promiseAllArr = this.list.map((item, index) => this.queryRect(
|
||
`u-tabs__wrapper__nav__item-${index}`, true))
|
||
Promise.all(promiseAllArr).then(sizes => resolve(sizes))
|
||
})
|
||
},
|
||
// 获取各个标签的尺寸
|
||
queryRect(el, item) {
|
||
// #ifndef APP-NVUE
|
||
// $uGetRect为uView自带的节点查询简化方法，详见文档介绍：https://ijry.github.io/uview-plus/js/getRect.html
|
||
// 组件内部一般用this.$uGetRect，对外的为uni.$u.getRect，二者功能一致，名称不同
|
||
return new Promise(resolve => {
|
||
this.$uGetRect(`.${el}`).then(size => {
|
||
resolve(size)
|
||
})
|
||
})
|
||
// #endif
|
||
|
||
// #ifdef APP-NVUE
|
||
// nvue下，使用dom模块查询元素高度
|
||
// 返回一个promise，让调用此方法的主体能使用then回调
|
||
return new Promise(resolve => {
|
||
dom.getComponentRect(item ? this.$refs[el][0] : this.$refs[el], res => {
|
||
resolve(res.size)
|
||
})
|
||
})
|
||
// #endif
|
||
},
|
||
},
|
||
}
|
||
</script>
|
||
|
||
<style lang="scss" scoped>
|
||
@import "../../libs/css/components.scss";
|
||
|
||
.u-tabs {
|
||
|
||
&__wrapper {
|
||
@include flex;
|
||
align-items: center;
|
||
|
||
&__scroll-view-wrapper {
|
||
flex: 1;
|
||
/* #ifndef APP-NVUE */
|
||
overflow: auto hidden;
|
||
/* #endif */
|
||
}
|
||
|
||
&__scroll-view {
|
||
@include flex;
|
||
flex: 1;
|
||
}
|
||
|
||
&__nav {
|
||
@include flex;
|
||
position: relative;
|
||
|
||
&__item {
|
||
padding: 0 11px;
|
||
@include flex;
|
||
align-items: center;
|
||
justify-content: center;
|
||
|
||
&--disabled {
|
||
/* #ifndef APP-NVUE */
|
||
cursor: not-allowed;
|
||
/* #endif */
|
||
}
|
||
|
||
&__text {
|
||
font-size: 15px;
|
||
color: $u-content-color;
|
||
|
||
&--disabled {
|
||
color: $u-disabled-color !important;
|
||
}
|
||
}
|
||
}
|
||
|
||
&__line {
|
||
height: 3px;
|
||
background: $u-primary;
|
||
width: 30px;
|
||
position: absolute;
|
||
bottom: 2px;
|
||
border-radius: 100px;
|
||
transition-property: transform;
|
||
transition-duration: 300ms;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
</style>
|