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339 lines
8.1 KiB
339 lines
8.1 KiB
<template>
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<view :id="elId" class="v-tabs">
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<scroll-view
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id="scrollContainer"
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:scroll-x="scroll"
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:scroll-left="scroll ? scrollLeft : 0"
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:scroll-with-animation="scroll"
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:style="{ position: fixed ? 'fixed' : 'relative', zIndex: 1993 }"
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>
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<view
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class="v-tabs__container"
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:style="{
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display: scroll ? 'inline-flex' : 'flex',
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whiteSpace: scroll ? 'nowrap' : 'normal',
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background: bgColor,
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height,
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padding
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}"
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>
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<view
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class="v-tabs__container-item"
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v-for="(v, i) in tabs"
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:key="i"
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:style="{
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color: current == i ? activeColor : color,
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fontSize: current == i ? fontSize : fontSize,
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fontWeight: bold && current == i ? 'bold' : '',
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justifyContent: !scroll ? 'center' : '',
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flex: scroll ? '' : 1,
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padding: paddingItem
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}"
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@click="change(i)"
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>
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{{ field ? v[field] : v }}
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</view>
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<view
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v-if="!pills"
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class="v-tabs__container-line"
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:style="{
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background: lineColor,
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width: lineWidth + 'px',
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height: lineHeight,
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borderRadius: lineRadius,
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left: lineLeft + 'px',
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transform: `translateX(-${lineWidth / 2}px)`
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}"
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></view>
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<view
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v-else
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class="v-tabs__container-pills"
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:style="{
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background: pillsColor,
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borderRadius: pillsBorderRadius,
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left: pillsLeft + 'px',
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width: currentWidth + 'px',
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height
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}"
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></view>
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</view>
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</scroll-view>
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<view
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class="v-tabs__placeholder"
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:style="{
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height: fixed ? height : '0',
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padding
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}"
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></view>
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</view>
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</template>
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<script>
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/**
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* v-tabs
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* @property {Number} value 选中的下标
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* @property {Array} tabs tabs 列表
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* @property {String} bgColor = '#fff' 背景颜色
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* @property {String} color = '#333' 默认颜色
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* @property {String} activeColor = '#2979ff' 选中文字颜色
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* @property {String} fontSize = '28rpx' 默认文字大小
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* @property {String} activeFontSize = '28rpx' 选中文字大小
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* @property {Boolean} bold = [true | false] 选中文字是否加粗
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* @property {Boolean} scroll = [true | false] 是否滚动
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* @property {String} height = '60rpx' tab 的高度
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* @property {String} lineHeight = '10rpx' 下划线的高度
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* @property {String} lineColor = '#2979ff' 下划线的颜色
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* @property {Number} lineScale = 0.5 下划线的宽度缩放比例
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* @property {String} lineRadius = '10rpx' 下划线圆角
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* @property {Boolean} pills = [true | false] 是否胶囊样式
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* @property {String} pillsColor = '#2979ff' 胶囊背景色
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* @property {String} pillsBorderRadius = '10rpx' 胶囊圆角大小
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* @property {String} field 如果是对象，显示的键名
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* @property {Boolean} fixed = [true | false] 是否固定
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* @property {String} paddingItem = '0 22rpx' 选项的边距
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*
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* @event {Function(current)} change 改变标签触发
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*/
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export default {
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props: {
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value: {
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type: Number,
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default: 0
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},
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tabs: {
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type: Array,
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default() {
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return []
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}
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},
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bgColor: {
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type: String,
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default: '#fff'
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},
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padding: {
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type: String,
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default: '0'
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},
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color: {
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type: String,
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default: '#333'
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},
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activeColor: {
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type: String,
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default: '#2979ff'
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},
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fontSize: {
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type: String,
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default: '28rpx'
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},
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activeFontSize: {
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type: String,
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default: '32rpx'
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},
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bold: {
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type: Boolean,
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default: true
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},
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scroll: {
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type: Boolean,
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default: true
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},
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height: {
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type: String,
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default: '70rpx'
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},
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lineColor: {
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type: String,
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default: '#2979ff'
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},
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lineHeight: {
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type: String,
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default: '10rpx'
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},
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lineScale: {
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type: Number,
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default: 0.5
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},
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lineRadius: {
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type: String,
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default: '10rpx'
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},
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pills: {
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type: Boolean,
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deafult: false
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},
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pillsColor: {
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type: String,
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default: '#2979ff'
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},
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pillsBorderRadius: {
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type: String,
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default: '10rpx'
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},
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field: {
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type: String,
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default: ''
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},
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fixed: {
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type: Boolean,
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default: false
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},
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paddingItem: {
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type: String,
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default: '0 22rpx'
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}
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},
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data() {
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return {
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elId: '',
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lineWidth: 30,
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currentWidth: 0, // 当前选项的宽度
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lineLeft: 0, // 滑块距离左侧的位置
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pillsLeft: 0, // 胶囊距离左侧的位置
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scrollLeft: 0, // 距离左边的位置
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containerWidth: 0, // 容器的宽度
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current: 0 // 当前选中项
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}
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},
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watch: {
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value(newVal) {
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this.current = newVal
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this.$nextTick(() => {
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this.getTabItemWidth()
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})
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},
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current(newVal) {
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this.$emit('input', newVal)
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},
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tabs(newVal) {
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this.$nextTick(() => {
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this.getTabItemWidth()
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})
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}
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},
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methods: {
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// 产生随机字符串
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randomString(len) {
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len = len || 32
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let $chars =
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'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678' /****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/
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let maxPos = $chars.length
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let pwd = ''
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for (let i = 0; i < len; i++) {
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pwd += $chars.charAt(Math.floor(Math.random() * maxPos))
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}
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return pwd
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},
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// 切换事件
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change(index) {
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if (this.current !== index) {
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this.current = index
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this.$emit('change', index)
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}
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},
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// 获取左移动位置
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getTabItemWidth() {
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let query = uni
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.createSelectorQuery()
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// #ifndef MP-ALIPAY
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.in(this)
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// #endif
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// 获取容器的宽度
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query
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.select(`#scrollContainer`)
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.boundingClientRect((data) => {
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if (!this.containerWidth && data) {
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this.containerWidth = data.width
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}
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})
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.exec()
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// 获取所有的 tab-item 的宽度
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query
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.selectAll('.v-tabs__container-item')
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.boundingClientRect((data) => {
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if (!data) {
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return
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}
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let lineLeft = 0
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let currentWidth = 0
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if (data) {
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for (let i = 0; i < data.length; i++) {
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if (i < this.current) {
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lineLeft += data[i].width
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} else if (i == this.current) {
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currentWidth = data[i].width
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} else {
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break
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}
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}
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}
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// 当前滑块的宽度
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this.currentWidth = currentWidth
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// 缩放后的滑块宽度
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this.lineWidth = currentWidth * this.lineScale * 1
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// 滑块作移动的位置
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this.lineLeft = lineLeft + currentWidth / 2
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// 胶囊距离左侧的位置
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this.pillsLeft = lineLeft
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// 计算滚动的距离左侧的位置
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if (this.scroll) {
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this.scrollLeft = this.lineLeft - this.containerWidth / 2
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}
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})
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.exec()
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}
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},
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mounted() {
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this.elId = 'xfjpeter_' + this.randomString()
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this.current = this.value
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this.$nextTick(() => {
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this.getTabItemWidth()
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})
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}
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}
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</script>
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<style lang="scss" scoped>
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.v-tabs {
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width: 100%;
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box-sizing: border-box;
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overflow: hidden;
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::-webkit-scrollbar {
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display: none;
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}
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&__container {
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min-width: 100%;
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position: relative;
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display: inline-flex;
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align-items: center;
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white-space: nowrap;
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overflow: hidden;
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&-item {
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display: flex;
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align-items: center;
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height: 100%;
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position: relative;
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z-index: 10;
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// padding: 0 11px;
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transition: all 0.3s;
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white-space: nowrap;
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}
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&-line {
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position: absolute;
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bottom: 0;
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transition: all 0.3s linear;
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}
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&-pills {
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position: absolute;
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transition: all 0.3s linear;
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z-index: 9;
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}
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}
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}
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</style>
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