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- <template>
- <view class="u-subsection" :style="[subsectionStyle]">
- <view class="u-item u-line-1" :style="[itemStyle(index)]" @tap="click(index)" :class="[noBorderRight(index), 'u-item-' + index]"
- v-for="(item, index) in listInfo" :key="index">
- <view :style="[textStyle(index)]" class="u-item-text u-line-1">{{ item.name }}</view>
- </view>
- <view class="u-item-bg" :style="[itemBarStyle]"></view>
- </view>
- </template>
- <script>
- /**
- * subsection 分段器
- * @description 该分段器一般用于用户从几个选项中选择某一个的场景
- * @tutorial https://www.uviewui.com/components/subsection.html
- * @property {Array} list 选项的数组,形式见上方"基本使用"
- * @property {String Number} current 初始化时默认选中的选项索引值(默认0)
- * @property {String} active-color 激活时的颜色,mode为subsection时固定为白色(默认#303133)
- * @property {String} inactive-color 未激活时字体的颜色,mode为subsection时无效(默认#606266)
- * @property {String} mode 模式选择,见官网"模式选择"说明(默认button)
- * @property {String Number} font-size 字体大小,单位rpx(默认28)
- * @property {String Number} height 组件高度,单位rpx(默认70)
- * @property {Boolean} animation 是否开启动画效果,见上方说明(默认true)
- * @property {Boolean} bold 激活选项的字体是否加粗(默认true)
- * @property {String} bg-color 组件背景颜色,mode为button时有效(默认#eeeeef)
- * @property {String} button-color 按钮背景颜色,mode为button时有效(默认#ffffff)
- * @event {Function} change 分段器选项发生改变时触发
- * @example <u-subsection active-color="#ff9900"></u-subsection>
- */
- export default {
- name: "u-subsection",
- props: {
- // tab的数据
- list: {
- type: Array,
- default () {
- return [];
- }
- },
- // 当前活动的tab的index
- current: {
- type: [Number, String],
- default: 0
- },
- // 激活的颜色
- activeColor: {
- type: String,
- default: '#303133'
- },
- // 未激活的颜色
- inactiveColor: {
- type: String,
- default: '#606266'
- },
- // 模式选择,mode=button为按钮形式,mode=subsection时为分段模式
- mode: {
- type: String,
- default: 'button'
- },
- // 字体大小,单位rpx
- fontSize: {
- type: [Number, String],
- default: 28
- },
- // 是否开启动画效果
- animation: {
- type: Boolean,
- default: true
- },
- // 组件的高度,单位rpx
- height: {
- type: [Number, String],
- default: 70
- },
- // 激活tab的字体是否加粗
- bold: {
- type: Boolean,
- default: true
- },
- // mode=button时,组件背景颜色
- bgColor: {
- type: String,
- default: '#eeeeef'
- },
- // mode = button时,滑块背景颜色
- buttonColor: {
- type: String,
- default: '#ffffff'
- },
- // 在切换分段器的时候,是否让设备震一下
- vibrateShort: {
- type: Boolean,
- default: false
- }
- },
- data() {
- return {
- listInfo: [],
- itemBgStyle: {
- width: 0,
- left: 0,
- backgroundColor: '#ffffff',
- height: '100%',
- transition: ''
- },
- currentIndex: this.current,
- buttonPadding: 3, // mode = button 时,组件的内边距
- borderRadius: 5, // 圆角值
- firstTimeVibrateShort: true // 组件初始化时,会触发current变化,此时不应震动
- };
- },
- watch: {
- current: {
- immediate: true,
- handler(nVal) {
- this.currentIndex = nVal;
- this.changeSectionStatus(nVal);
- }
- }
- },
- created() {
- // 将list的数据,传入listInfo数组,因为不能修改props传递的list值
- // 可以接受直接数组形式,或者数组元素为对象的形式,如:['简介', '评论'],或者[{name: '简介'}, {name: '评论'}]
- this.listInfo = this.list.map((val, index) => {
- if (typeof val != 'object') {
- let obj = {
- width: 0,
- name: val
- };
- return obj;
- } else {
- val.width = 0;
- return val;
- }
- });
- },
- computed: {
- // 设置mode=subsection时,滑块特有的样式
- noBorderRight() {
- return index => {
- if (this.mode != 'subsection') return;
- let classs = '';
- // 不显示右边的边框
- if (index < this.list.length - 1) classs += ' u-none-border-right';
- // 显示整个组件的左右边圆角
- if (index == 0) classs += ' u-item-first';
- if (index == this.list.length - 1) classs += ' u-item-last';
- return classs;
- };
- },
- // 文字的样式
- textStyle() {
- return index => {
- let style = {};
- // 设置字体颜色
- if (this.mode == 'subsection') {
- if (index == this.currentIndex) {
- style.color = '#ffffff';
- } else {
- style.color = this.activeColor;
- }
- } else {
- if (index == this.currentIndex) {
- style.color = this.activeColor;
- } else {
- style.color = this.inactiveColor;
- }
- }
- // 字体加粗
- if (index == this.currentIndex && this.bold) style.fontWeight = 'bold';
- // 文字大小
- style.fontSize = this.fontSize + 'rpx';
- return style;
- };
- },
- // 每个分段器item的样式
- itemStyle() {
- return index => {
- let style = {};
- if (this.mode == 'subsection') {
- // 设置border的样式
- style.borderColor = this.activeColor;
- style.borderWidth = '1px';
- style.borderStyle = 'solid';
- }
- return style;
- };
- },
- // mode=button时,外层view的样式
- subsectionStyle() {
- let style = {};
- style.height = uni.upx2px(this.height) + 'px';
- if (this.mode == 'button') {
- style.backgroundColor = this.bgColor;
- style.padding = `${this.buttonPadding}px`;
- style.borderRadius = `${this.borderRadius}px`;
- }
- return style;
- },
- // 滑块的样式
- itemBarStyle() {
- let style = {};
- style.backgroundColor = this.activeColor;
- style.zIndex = 1;
- if (this.mode == 'button') {
- style.backgroundColor = this.buttonColor;
- style.borderRadius = `${this.borderRadius}px`;
- style.bottom = `${this.buttonPadding}px`;
- style.height = uni.upx2px(this.height) - this.buttonPadding * 2 + 'px';
- style.zIndex = 0;
- }
- return Object.assign(this.itemBgStyle, style);
- }
- },
- mounted() {
- setTimeout(() => {
- this.getTabsInfo();
- }, 10);
- },
- methods: {
- // 改变滑块的样式
- changeSectionStatus(nVal) {
- if (this.mode == 'subsection') {
- // 根据滑块在最左边和最右边时,显示左边和右边的圆角
- if (nVal == this.list.length - 1) {
- this.itemBgStyle.borderRadius = `0 ${this.buttonPadding}px ${this.buttonPadding}px 0`;
- }
- if (nVal == 0) {
- this.itemBgStyle.borderRadius = `${this.buttonPadding}px 0 0 ${this.buttonPadding}px`;
- }
- if (nVal > 0 && nVal < this.list.length - 1) {
- this.itemBgStyle.borderRadius = '0';
- }
- }
- // 更新滑块的位置
- setTimeout(() => {
- this.itemBgLeft();
- }, 10);
- if (this.vibrateShort && !this.firstTimeVibrateShort) {
- // 使手机产生短促震动,微信小程序有效,APP(HX 2.6.8)和H5无效
- // #ifndef H5
- uni.vibrateShort();
- // #endif
- }
- // 第一次过后,设置firstTimeVibrateShort为false,让其下一次可以震动(如果允许震动的话)
- this.firstTimeVibrateShort = false;
- },
- click(index) {
- // 不允许点击当前激活选项
- if (index == this.currentIndex) return;
- this.currentIndex = index;
- this.changeSectionStatus(index);
- this.$emit('change', Number(index));
- },
- // 获取各个tab的节点信息
- getTabsInfo() {
- let view = uni.createSelectorQuery().in(this);
- for (let i = 0; i < this.list.length; i++) {
- view.select('.u-item-' + i).boundingClientRect();
- }
- view.exec(res => {
- if (!res.length) {
- setTimeout(() => {
- this.getTabsInfo();
- return;
- }, 10);
- }
- // 将分段器每个item的宽度,放入listInfo数组
- res.map((val, index) => {
- this.listInfo[index].width = val.width;
- });
- // 初始化滑块的宽度
- if (this.mode == 'subsection') {
- this.itemBgStyle.width = this.listInfo[0].width + 'px';
- } else if (this.mode == 'button') {
- this.itemBgStyle.width = this.listInfo[0].width + 'px';
- }
- // 初始化滑块的位置
- this.itemBgLeft();
- });
- },
- itemBgLeft() {
- // 根据是否开启动画效果,
- if (this.animation) {
- this.itemBgStyle.transition = 'all 0.35s';
- } else {
- this.itemBgStyle.transition = 'all 0s';
- }
- let left = 0;
- // 计算当前活跃item到组件左边的距离
- this.listInfo.map((val, index) => {
- if (index < this.currentIndex) left += val.width;
- });
- // 根据mode不同模式,计算滑块需要移动的距离
- if (this.mode == 'subsection') {
- this.itemBgStyle.left = left + 'px';
- } else if (this.mode == 'button') {
- this.itemBgStyle.left = left + this.buttonPadding + 'px';
- }
- }
- }
- };
- </script>
- <style lang="scss" scoped>
- @import "../../libs/css/style.components.scss";
- .u-subsection {
- @include vue-flex;
- align-items: center;
- overflow: hidden;
- position: relative;
- }
- .u-item {
- flex: 1;
- text-align: center;
- font-size: 26rpx;
- height: 100%;
- @include vue-flex;
- align-items: center;
- justify-content: center;
- color: $u-main-color;
- padding: 0 6rpx;
- }
- .u-item-bg {
- background-color: $u-type-primary;
- position: absolute;
- z-index: -1;
- }
- .u-none-border-right {
- border-right: none !important;
- }
- .u-item-first {
- border-top-left-radius: 8rpx;
- border-bottom-left-radius: 8rpx;
- }
- .u-item-last {
- border-top-right-radius: 8rpx;
- border-bottom-right-radius: 8rpx;
- }
- .u-item-text {
- transition: all 0.35s;
- color: $u-main-color;
- @include vue-flex;
- align-items: center;
- position: relative;
- z-index: 3;
- }
- </style>
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