工行这里学车报名流程h5
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<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>