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- <template>
- <view
- class="u-rate"
- :id="elId"
- ref="u-rate"
- :style="[$u.addStyle(customStyle)]"
- >
- <view
- class="u-rate__content"
- @touchmove.stop="touchMove"
- @touchend.stop="touchEnd"
- >
- <view
- class="u-rate__content__item"
- v-for="(item, index) in Number(count)"
- :key="index"
- :class="[elClass]"
- >
- <view
- class="u-rate__content__item__icon-wrap"
- ref="u-rate__content__item__icon-wrap"
- @tap.stop="clickHandler($event, index + 1)"
- >
- <u-icon
- :name="
- Math.floor(activeIndex) > index
- ? activeIcon
- : inactiveIcon
- "
- :color="
- disabled
- ? '#c8c9cc'
- : Math.floor(activeIndex) > index
- ? activeColor
- : inactiveColor
- "
- :custom-style="{
- 'padding-left': $u.addUnit(gutter / 2),
- 'padding-right': $u.addUnit(gutter / 2)
- }"
- :size="size"
- ></u-icon>
- </view>
- <view
- v-if="allowHalf"
- @tap.stop="clickHandler($event, index + 1)"
- class="u-rate__content__item__icon-wrap u-rate__content__item__icon-wrap--half"
- :style="[{
- width: $u.addUnit(rateWidth / 2),
- }]"
- ref="u-rate__content__item__icon-wrap"
- >
- <u-icon
- :name="
- Math.ceil(activeIndex) > index
- ? activeIcon
- : inactiveIcon
- "
- :color="
- disabled
- ? '#c8c9cc'
- : Math.ceil(activeIndex) > index
- ? activeColor
- : inactiveColor
- "
- :custom-style="{
- 'padding-left': $u.addUnit(gutter / 2),
- 'padding-right': $u.addUnit(gutter / 2)
- }"
- :size="size"
- ></u-icon>
- </view>
- </view>
- </view>
- </view>
- </template>
- <script>
- import props from './props.js';
- // #ifdef APP-NVUE
- const dom = weex.requireModule("dom");
- // #endif
- /**
- * rate 评分
- * @description 该组件一般用于满意度调查,星型评分的场景
- * @tutorial https://www.uviewui.com/components/rate.html
- * @property {String | Number} value 用于v-model双向绑定选中的星星数量 (默认 1 )
- * @property {String | Number} count 最多可选的星星数量 (默认 5 )
- * @property {Boolean} disabled 是否禁止用户操作 (默认 false )
- * @property {Boolean} readonly 是否只读 (默认 false )
- * @property {String | Number} size 星星的大小,单位px (默认 18 )
- * @property {String} inactiveColor 未选中星星的颜色 (默认 '#b2b2b2' )
- * @property {String} activeColor 选中的星星颜色 (默认 '#FA3534' )
- * @property {String | Number} gutter 星星之间的距离 (默认 4 )
- * @property {String | Number} minCount 最少选中星星的个数 (默认 1 )
- * @property {Boolean} allowHalf 是否允许半星选择 (默认 false )
- * @property {String} activeIcon 选中时的图标名,只能为uView的内置图标 (默认 'star-fill' )
- * @property {String} inactiveIcon 未选中时的图标名,只能为uView的内置图标 (默认 'star' )
- * @property {Boolean} touchable 是否可以通过滑动手势选择评分 (默认 'true' )
- * @property {Object} customStyle 组件的样式,对象形式
- * @event {Function} change 选中的星星发生变化时触发
- * @example <u-rate :count="count" :value="2"></u-rate>
- */
- export default {
- name: "u-rate",
- mixins: [uni.$u.mpMixin, uni.$u.mixin,props],
- data() {
- return {
- // 生成一个唯一id,否则一个页面多个评分组件,会造成冲突
- elId: uni.$u.guid(),
- elClass: uni.$u.guid(),
- rateBoxLeft: 0, // 评分盒子左边到屏幕左边的距离,用于滑动选择时计算距离
- activeIndex: this.value,
- rateWidth: 0, // 每个星星的宽度
- // 标识是否正在滑动,由于iOS事件上touch比click先触发,导致快速滑动结束后,接着触发click,导致事件混乱而出错
- moving: false,
- };
- },
- watch: {
- value(val) {
- this.activeIndex = val;
- },
- activeIndex: 'emitEvent'
- },
- methods: {
- init() {
- uni.$u.sleep().then(() => {
- this.getRateItemRect();
- this.getRateIconWrapRect();
- })
- },
- // 获取评分组件盒子的布局信息
- async getRateItemRect() {
- await uni.$u.sleep();
- // uView封装的获取节点的方法,详见文档
- // #ifndef APP-NVUE
- this.$uGetRect("#" + this.elId).then((res) => {
- this.rateBoxLeft = res.left;
- });
- // #endif
- // #ifdef APP-NVUE
- dom.getComponentRect(this.$refs["u-rate"], (res) => {
- this.rateBoxLeft = res.size.left;
- });
- // #endif
- },
- // 获取单个星星的尺寸
- getRateIconWrapRect() {
- // uView封装的获取节点的方法,详见文档
- // #ifndef APP-NVUE
- this.$uGetRect("." + this.elClass).then((res) => {
- this.rateWidth = res.width;
- });
- // #endif
- // #ifdef APP-NVUE
- dom.getComponentRect(
- this.$refs["u-rate__content__item__icon-wrap"][0],
- (res) => {
- this.rateWidth = res.size.width;
- }
- );
- // #endif
- },
- // 手指滑动
- touchMove(e) {
- // 如果禁止通过手动滑动选择,返回
- if (!this.touchable) {
- return;
- }
- this.preventEvent(e);
- const x = e.changedTouches[0].pageX;
- this.getActiveIndex(x);
- },
- // 停止滑动
- touchEnd(e) {
- // 如果禁止通过手动滑动选择,返回
- if (!this.touchable) {
- return;
- }
- this.preventEvent(e);
- const x = e.changedTouches[0].pageX;
- this.getActiveIndex(x);
- },
- // 通过点击,直接选中
- clickHandler(e, index) {
- // ios上,moving状态取消事件触发
- if (uni.$u.os() === "ios" && this.moving) {
- return;
- }
- this.preventEvent(e);
- let x = 0;
- // 点击时,在nvue上,无法获得点击的坐标,所以无法实现点击半星选择
- // #ifndef APP-NVUE
- x = e.changedTouches[0].pageX;
- // #endif
- // #ifdef APP-NVUE
- // nvue下,无法通过点击获得坐标信息,这里通过元素的位置尺寸值模拟坐标
- x = index * this.rateWidth + this.rateBoxLeft;
- // #endif
- this.getActiveIndex(x,true);
- },
- // 发出事件
- emitEvent() {
- // 发出change事件
- this.$emit("change", this.activeIndex);
- // 同时修改双向绑定的value的值
- this.$emit("input", this.activeIndex);
- },
- // 获取当前激活的评分图标
- getActiveIndex(x,isClick = false) {
- if (this.disabled || this.readonly) {
- return;
- }
- // 判断当前操作的点的x坐标值,是否在允许的边界范围内
- const allRateWidth = this.rateWidth * this.count + this.rateBoxLeft;
- // 如果小于第一个图标的左边界,设置为最小值,如果大于所有图标的宽度,则设置为最大值
- x = uni.$u.range(this.rateBoxLeft, allRateWidth, x) - this.rateBoxLeft
- // 滑动点相对于评分盒子左边的距离
- const distance = x;
- // 滑动的距离,相当于多少颗星星
- let index;
- // 判断是否允许半星
- if (this.allowHalf) {
- index = Math.floor(distance / this.rateWidth);
- // 取余,判断小数的区间范围
- const decimal = distance % this.rateWidth;
- if (decimal <= this.rateWidth / 2 && decimal > 0) {
- index += 0.5;
- } else if (decimal > this.rateWidth / 2) {
- index++;
- }
- } else {
- index = Math.floor(distance / this.rateWidth);
- // 取余,判断小数的区间范围
- const decimal = distance % this.rateWidth;
- // 非半星时,只有超过了图标的一半距离,才认为是选择了这颗星
- if (isClick){
- if (decimal > 0) index++;
- } else {
- if (decimal > this.rateWidth / 2) index++;
- }
- }
- this.activeIndex = Math.min(index, this.count);
- // 对最少颗星星的限制
- if (this.activeIndex < this.minCount) {
- this.activeIndex = this.minCount;
- }
- // 设置延时为了让click事件在touchmove之前触发
- setTimeout(() => {
- this.moving = true;
- }, 10);
- // 一定时间后,取消标识为移动中状态,是为了让click事件无效
- setTimeout(() => {
- this.moving = false;
- }, 10);
- },
- },
- mounted() {
- this.init();
- },
- };
- </script>
- <style lang="scss" scoped>
- @import "../../libs/css/components.scss";
- $u-rate-margin: 0 !default;
- $u-rate-padding: 0 !default;
- $u-rate-item-icon-wrap-half-top: 0 !default;
- $u-rate-item-icon-wrap-half-left: 0 !default;
- .u-rate {
- @include flex;
- align-items: center;
- margin: $u-rate-margin;
- padding: $u-rate-padding;
- /* #ifndef APP-NVUE */
- touch-action: none;
- /* #endif */
- &__content {
- @include flex;
- &__item {
- position: relative;
- &__icon-wrap {
- &--half {
- position: absolute;
- overflow: hidden;
- top: $u-rate-item-icon-wrap-half-top;
- left: $u-rate-item-icon-wrap-half-left;
- }
- }
- }
- }
- }
- .u-icon {
- /* #ifndef APP-NVUE */
- box-sizing: border-box;
- /* #endif */
- }
- </style>
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