489 lines
14 KiB
Vue
489 lines
14 KiB
Vue
<template>
|
||
<view class="u-tabs" :style="{
|
||
zIndex: zIndex,
|
||
background: bgColor
|
||
}">
|
||
<scroll-view scroll-x class="u-scroll-view" :scroll-left="scrollLeft" scroll-with-animation :style="{ zIndex: zIndex + 1 }">
|
||
<view class="u-tabs-scroll-box" :class="{'u-tabs-scorll-flex': !isScroll}">
|
||
<view class="u-tabs-item" :style="[tabItemStyle(index)]"
|
||
v-for="(item, index) in getTabs" :key="index" :class="[preId + index]" @tap="emit(index)">
|
||
<u-badge :count="item[count] || item['count'] || 0" :offset="offset" size="mini"></u-badge>
|
||
{{ item[name] || item['name']}}
|
||
</view>
|
||
<view v-if="showBar" class="u-scroll-bar" :style="[tabBarStyle]"></view>
|
||
</view>
|
||
</scroll-view>
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
import colorGradient from '../../libs/function/colorGradient';
|
||
let color = colorGradient;
|
||
const { windowWidth } = uni.getSystemInfoSync();
|
||
const preId = 'UEl_';
|
||
|
||
/**
|
||
* tabsSwiper 全屏选项卡
|
||
* @description 该组件内部实现主要依托于uniapp的scroll-view和swiper组件，主要特色是切换过程中，tabsSwiper文字的颜色可以渐变，底部滑块可以 跟随式滑动，活动tab滚动居中等。应用场景可以用于需要左右切换页面，比如商城的订单中心(待收货-待付款-待评价-已退货)等应用场景。
|
||
* @tutorial https://www.uviewui.com/components/tabsSwiper.html
|
||
* @property {Boolean} is-scroll tabs是否可以左右拖动（默认true）
|
||
* @property {Array} list 标签数组，元素为对象，如[{name: '推荐'}]
|
||
* @property {String Number} current 指定哪个tab为激活状态（默认0）
|
||
* @property {String Number} height 导航栏的高度，单位rpx（默认80）
|
||
* @property {String Number} font-size tab文字大小，单位rpx（默认30）
|
||
* @property {String Number} swiper-width tabs组件外部swiper的宽度，默认为屏幕宽度，单位rpx（默认750）
|
||
* @property {String} active-color 滑块和激活tab文字的颜色（默认#2979ff）
|
||
* @property {String} inactive-color tabs文字颜色（默认#303133）
|
||
* @property {String Number} bar-width 滑块宽度，单位rpx（默认40）
|
||
* @property {String Number} bar-height 滑块高度，单位rpx（默认6）
|
||
* @property {Object} bar-style 底部滑块的样式，对象形式
|
||
* @property {Object} active-item-style 活动tabs item的样式，对象形式
|
||
* @property {Boolean} show-bar 是否显示底部的滑块（默认true）
|
||
* @property {String Number} gutter 单个tab标签的左右内边距之和，单位rpx（默认40）
|
||
* @property {String} bg-color tabs导航栏的背景颜色（默认#ffffff）
|
||
* @property {String} name 组件内部读取的list参数中的属性名，见官网说明（默认name）
|
||
* @property {String} count 组件内部读取的list参数中的属性名（badge徽标数），同name属性的使用，见官网说明（默认count）
|
||
* @property {Array} offset 设置badge徽标数的位置偏移，格式为 [x, y]，也即设置的为top和right的值，单位rpx（默认[5, 20]）
|
||
* @property {Boolean} bold 激活选项的字体是否加粗（默认true）
|
||
* @event {Function} change 点击标签时触发
|
||
* @example <u-tabs-swiper ref="tabs" :list="list" :is-scroll="false"></u-tabs-swiper>
|
||
*/
|
||
export default {
|
||
name: "u-tabs-swiper",
|
||
props: {
|
||
// 导航菜单是否需要滚动，如只有2或者3个的时候，就不需要滚动了，此时使用flex平分tab的宽度
|
||
isScroll: {
|
||
type: Boolean,
|
||
default: true
|
||
},
|
||
//需循环的标签列表
|
||
list: {
|
||
type: Array,
|
||
default () {
|
||
return [];
|
||
}
|
||
},
|
||
// 当前活动tab的索引
|
||
current: {
|
||
type: [Number, String],
|
||
default: 0
|
||
},
|
||
// 导航栏的高度和行高，单位rpx
|
||
height: {
|
||
type: [Number, String],
|
||
default: 80
|
||
},
|
||
// 字体大小，单位rpx
|
||
fontSize: {
|
||
type: [Number, String],
|
||
default: 30
|
||
},
|
||
// 过渡动画时长, 单位s
|
||
// duration: {
|
||
// type: [Number, String],
|
||
// default: 0.5
|
||
// },
|
||
swiperWidth: {
|
||
//line3生效, 外部swiper的宽度, 单位rpx
|
||
type: [String, Number],
|
||
default: 750
|
||
},
|
||
// 选中项的主题颜色
|
||
activeColor: {
|
||
type: String,
|
||
default: '#2979ff'
|
||
},
|
||
// 未选中项的颜色
|
||
inactiveColor: {
|
||
type: String,
|
||
default: '#303133'
|
||
},
|
||
// 菜单底部移动的bar的宽度，单位rpx
|
||
barWidth: {
|
||
type: [Number, String],
|
||
default: 40
|
||
},
|
||
// 移动bar的高度
|
||
barHeight: {
|
||
type: [Number, String],
|
||
default: 6
|
||
},
|
||
// 单个tab的左或右内边距（各占一半），单位rpx
|
||
gutter: {
|
||
type: [Number, String],
|
||
default: 40
|
||
},
|
||
// 如果是绝对定位，添加z-index值
|
||
zIndex: {
|
||
type: [Number, String],
|
||
default: 1
|
||
},
|
||
// 导航栏的背景颜色
|
||
bgColor: {
|
||
type: String,
|
||
default: '#ffffff'
|
||
},
|
||
//滚动至中心目标类型
|
||
autoCenterMode: {
|
||
type: String,
|
||
default: 'window'
|
||
},
|
||
// 读取传入的数组对象的属性(tab名称)
|
||
name: {
|
||
type: String,
|
||
default: 'name'
|
||
},
|
||
// 读取传入的数组对象的属性(徽标数)
|
||
count: {
|
||
type: String,
|
||
default: 'count'
|
||
},
|
||
// 徽标数位置偏移
|
||
offset: {
|
||
type: Array,
|
||
default: () => {
|
||
return [5, 20]
|
||
}
|
||
},
|
||
// 活动tab字体是否加粗
|
||
bold: {
|
||
type: Boolean,
|
||
default: true
|
||
},
|
||
// 当前活动tab item的样式
|
||
activeItemStyle: {
|
||
type: Object,
|
||
default() {
|
||
return {}
|
||
}
|
||
},
|
||
// 是否显示底部的滑块
|
||
showBar: {
|
||
type: Boolean,
|
||
default: true
|
||
},
|
||
// 底部滑块的自定义样式
|
||
barStyle: {
|
||
type: Object,
|
||
default() {
|
||
return {}
|
||
}
|
||
}
|
||
},
|
||
data() {
|
||
return {
|
||
scrollLeft: 0, // 滚动scroll-view的左边滚动距离
|
||
tabQueryInfo: [], // 存放对tab菜单查询后的节点信息
|
||
windowWidth: 0, // 屏幕宽度，单位为px
|
||
//scrollBarLeft: 0, // 移动bar需要通过translateX()移动的距离
|
||
animationFinishCurrent: this.current,
|
||
componentsWidth: 0,
|
||
line3AddDx: 0,
|
||
line3Dx: 0,
|
||
preId,
|
||
sW: 0,
|
||
tabsInfo: [],
|
||
colorGradientArr: [],
|
||
colorStep: 100 // 两个颜色之间的渐变等分
|
||
};
|
||
},
|
||
computed: {
|
||
// 获取当前活跃的current值
|
||
getCurrent() {
|
||
const current = Number(this.current);
|
||
// 判断是否超出边界
|
||
if (current > this.getTabs.length - 1) {
|
||
return this.getTabs.length - 1;
|
||
}
|
||
if (current < 0) return 0;
|
||
return current;
|
||
},
|
||
getTabs() {
|
||
return this.list;
|
||
},
|
||
// 滑块需要移动的距离
|
||
scrollBarLeft() {
|
||
return Number(this.line3Dx) + Number(this.line3AddDx);
|
||
},
|
||
// 滑块的宽度转为px单位
|
||
barWidthPx() {
|
||
return uni.upx2px(this.barWidth);
|
||
},
|
||
// tab的样式
|
||
tabItemStyle() {
|
||
return (index) => {
|
||
let style = {
|
||
height: this.height + 'rpx',
|
||
lineHeight: this.height + 'rpx',
|
||
padding: `0 ${this.gutter / 2}rpx`,
|
||
color: this.tabsInfo.length > 0 ? (this.tabsInfo[index] ? this.tabsInfo[index].color : this.activeColor) : this.inactiveColor,
|
||
fontSize: this.fontSize + 'rpx',
|
||
zIndex: this.zIndex + 2,
|
||
fontWeight: (index == this.getCurrent && this.bold) ? 'bold' : 'normal'
|
||
};
|
||
if(index == this.getCurrent) {
|
||
// 给选中的tab item添加外部自定义的样式
|
||
style = Object.assign(style, this.activeItemStyle);
|
||
}
|
||
return style;
|
||
}
|
||
},
|
||
// 底部滑块的样式
|
||
tabBarStyle() {
|
||
let style = {
|
||
width: this.barWidthPx + 'px',
|
||
height: this.barHeight + 'rpx',
|
||
borderRadius: '100px',
|
||
backgroundColor: this.activeColor,
|
||
left: this.scrollBarLeft + 'px'
|
||
};
|
||
return Object.assign(style, this.barStyle);
|
||
}
|
||
},
|
||
watch: {
|
||
current(n, o) {
|
||
this.change(n);
|
||
this.setFinishCurrent(n);
|
||
},
|
||
list() {
|
||
this.$nextTick(() => {
|
||
this.init();
|
||
})
|
||
}
|
||
},
|
||
mounted() {
|
||
this.init();
|
||
},
|
||
methods: {
|
||
async init() {
|
||
this.countPx();
|
||
await this.getTabsInfo();
|
||
this.countLine3Dx();
|
||
this.getQuery(() => {
|
||
this.setScrollViewToCenter();
|
||
});
|
||
// 颜色渐变过程数组
|
||
this.colorGradientArr = color.colorGradient(this.inactiveColor, this.activeColor, this.colorStep);
|
||
},
|
||
// 获取各个tab的节点信息
|
||
getTabsInfo() {
|
||
return new Promise((resolve, reject) => {
|
||
let view = uni.createSelectorQuery().in(this);
|
||
for (let i = 0; i < this.list.length; i++) {
|
||
view.select('.' + preId + i).boundingClientRect();
|
||
}
|
||
view.exec(res => {
|
||
const arr = [];
|
||
for (let i = 0; i < res.length; i++) {
|
||
// 给每个tab添加其文字颜色属性
|
||
res[i].color = this.inactiveColor;
|
||
// 当前tab直接赋予activeColor
|
||
if (i == this.getCurrent) res[i].color = this.activeColor;
|
||
arr.push(res[i]);
|
||
}
|
||
this.tabsInfo = arr;
|
||
resolve();
|
||
});
|
||
})
|
||
},
|
||
// 当swiper滑动结束，计算滑块最终要停留的位置
|
||
countLine3Dx() {
|
||
const tab = this.tabsInfo[this.animationFinishCurrent];
|
||
// 让滑块中心点和当前tab中心重合
|
||
if (tab) this.line3Dx = tab.left + tab.width / 2 - this.barWidthPx / 2 - this.tabsInfo[0].left;
|
||
},
|
||
countPx() {
|
||
// swiper宽度由rpx转为px单位，因为dx等，都是px单位
|
||
this.sW = uni.upx2px(Number(this.swiperWidth));
|
||
},
|
||
emit(index) {
|
||
this.$emit('change', index);
|
||
},
|
||
change() {
|
||
this.setScrollViewToCenter();
|
||
},
|
||
getQuery(cb) {
|
||
try {
|
||
let view = uni.createSelectorQuery().in(this).select('.u-tabs');
|
||
view.fields({
|
||
size: true
|
||
},
|
||
data => {
|
||
if (data) {
|
||
this.componentsWidth = data.width;
|
||
if (cb && typeof cb === 'function') cb(data);
|
||
} else {
|
||
this.getQuery(cb);
|
||
}
|
||
}
|
||
).exec();
|
||
} catch (e) {
|
||
this.componentsWidth = windowWidth;
|
||
}
|
||
},
|
||
// 把活动tab移动到屏幕中心点
|
||
setScrollViewToCenter() {
|
||
let tab;
|
||
tab = this.tabsInfo[this.animationFinishCurrent];
|
||
if (tab) {
|
||
let tabCenter = tab.left + tab.width / 2;
|
||
let fatherWidth;
|
||
// 活动tab移动到中心时，以屏幕还是tab组件为宽度为基准
|
||
if (this.autoCenterMode === 'window') {
|
||
fatherWidth = windowWidth;
|
||
} else {
|
||
fatherWidth = this.componentsWidth;
|
||
}
|
||
this.scrollLeft = tabCenter - fatherWidth / 2;
|
||
}
|
||
},
|
||
setDx(dx) {
|
||
let nextTabIndex = dx > 0 ? this.animationFinishCurrent + 1 : this.animationFinishCurrent - 1;
|
||
// 判断索引是否超出边界
|
||
nextTabIndex = nextTabIndex <= 0 ? 0 : nextTabIndex;
|
||
nextTabIndex = nextTabIndex >= this.list.length ? this.list.length - 1 : nextTabIndex;
|
||
const tab = this.tabsInfo[nextTabIndex];
|
||
// 当前tab中心点x轴坐标
|
||
let nowTab = this.tabsInfo[this.animationFinishCurrent];
|
||
let nowTabX = nowTab.left + nowTab.width / 2;
|
||
// 下一个tab
|
||
let nextTab = this.tabsInfo[nextTabIndex];
|
||
let nextTabX = nextTab.left + nextTab.width / 2;
|
||
// 两个tab之间的距离，因为下一个tab可能在当前tab的左边或者右边，取绝对值即可
|
||
let distanceX = Math.abs(nextTabX - nowTabX);
|
||
this.line3AddDx = (dx / this.sW) * distanceX;
|
||
this.setTabColor(this.animationFinishCurrent, nextTabIndex, dx);
|
||
},
|
||
// 设置tab的颜色
|
||
setTabColor(nowTabIndex, nextTabIndex, dx) {
|
||
let colorIndex = Math.abs(Math.ceil((dx / this.sW) * 100));
|
||
let colorLength = this.colorGradientArr.length;
|
||
// 处理超出索引边界的情况
|
||
colorIndex = colorIndex >= colorLength ? colorLength - 1 : colorIndex <= 0 ? 0 : colorIndex;
|
||
// 设置下一个tab的颜色
|
||
this.tabsInfo[nextTabIndex].color = this.colorGradientArr[colorIndex];
|
||
// 设置当前tab的颜色
|
||
this.tabsInfo[nowTabIndex].color = this.colorGradientArr[colorLength - 1 - colorIndex];
|
||
},
|
||
// swiper结束滑动
|
||
setFinishCurrent(current) {
|
||
// 如果滑动的索引不一致，修改tab颜色变化，因为可能会有直接点击tab的情况
|
||
this.tabsInfo.map((val, index) => {
|
||
if (current == index) val.color = this.activeColor;
|
||
else val.color = this.inactiveColor;
|
||
return val;
|
||
});
|
||
this.line3AddDx = 0;
|
||
this.animationFinishCurrent = current;
|
||
this.countLine3Dx();
|
||
}
|
||
}
|
||
};
|
||
</script>
|
||
|
||
<style scoped lang="scss">
|
||
@import "../../libs/css/style.components.scss";
|
||
|
||
view,
|
||
scroll-view {
|
||
box-sizing: border-box;
|
||
}
|
||
|
||
.u-tabs {
|
||
width: 100%;
|
||
transition-property: background-color, color;
|
||
}
|
||
|
||
/* #ifndef APP-NVUE */
|
||
::-webkit-scrollbar,
|
||
::-webkit-scrollbar,
|
||
::-webkit-scrollbar {
|
||
display: none;
|
||
width: 0 !important;
|
||
height: 0 !important;
|
||
-webkit-appearance: none;
|
||
background: transparent;
|
||
}
|
||
/* #endif */
|
||
|
||
/* #ifdef H5 */
|
||
// 通过样式穿透，隐藏H5下，scroll-view下的滚动条
|
||
scroll-view ::v-deep ::-webkit-scrollbar {
|
||
display: none;
|
||
width: 0 !important;
|
||
height: 0 !important;
|
||
-webkit-appearance: none;
|
||
background: transparent;
|
||
}
|
||
|
||
/* #endif */
|
||
|
||
.u-scroll-view {
|
||
width: 100%;
|
||
white-space: nowrap;
|
||
position: relative;
|
||
}
|
||
|
||
.u-tabs-scroll-box {
|
||
position: relative;
|
||
}
|
||
|
||
.u-tabs-scorll-flex {
|
||
@include vue-flex;
|
||
justify-content: space-between;
|
||
}
|
||
|
||
.u-tabs-scorll-flex .u-tabs-item {
|
||
flex: 1;
|
||
}
|
||
|
||
.u-tabs-item {
|
||
position: relative;
|
||
display: inline-block;
|
||
text-align: center;
|
||
transition-property: background-color, color, font-weight;
|
||
}
|
||
|
||
.content {
|
||
overflow: hidden;
|
||
white-space: nowrap;
|
||
text-overflow: ellipsis;
|
||
}
|
||
|
||
.boxStyle {
|
||
pointer-events: none;
|
||
position: absolute;
|
||
transition-property: all;
|
||
}
|
||
|
||
.boxStyle2 {
|
||
pointer-events: none;
|
||
position: absolute;
|
||
bottom: 0;
|
||
transition-property: all;
|
||
transform: translateY(-100%);
|
||
}
|
||
|
||
.itemBackgroundBox {
|
||
pointer-events: none;
|
||
position: absolute;
|
||
top: 0;
|
||
transition-property: left, background-color;
|
||
@include vue-flex;
|
||
flex-direction: row;
|
||
justify-content: center;
|
||
align-items: center;
|
||
}
|
||
|
||
.itemBackground {
|
||
height: 100%;
|
||
width: 100%;
|
||
transition-property: all;
|
||
}
|
||
|
||
.u-scroll-bar {
|
||
position: absolute;
|
||
bottom: 4rpx;
|
||
}
|
||
</style>
|