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<template> <view class="u-subsection" ref="u-subsection" :class="[`u-subsection--${mode}`]" :style="[$u.addStyle(customStyle), wrapperStyle]" > <view class="u-subsection__bar" ref="u-subsection__bar" :style="[barStyle]" :class="[ mode === 'button' && 'u-subsection--button__bar', current === 0 && mode === 'subsection' && 'u-subsection__bar--first', current > 0 && current < list.length - 1 && mode === 'subsection' && 'u-subsection__bar--center', current === list.length - 1 && mode === 'subsection' && 'u-subsection__bar--last', ]" ></view> <view class="u-subsection__item" :class="[ `u-subsection__item--${index}`, index < list.length - 1 && 'u-subsection__item--no-border-right', index === 0 && 'u-subsection__item--first', index === list.length - 1 && 'u-subsection__item--last', ]" :ref="`u-subsection__item--${index}`" :style="[itemStyle(index)]" @tap="clickHandler(index)" v-for="(item, index) in list" :key="index" > <text class="u-subsection__item__text" :style="[textStyle(index)]" >{{ getText(item) }}</text > </view> </view> </template>
<script> // #ifdef APP-NVUE
const dom = uni.requireNativePlugin("dom"); const animation = uni.requireNativePlugin("animation"); // #endif
import props from "./props.js"; /** * 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 tab的数据 * @property {String | Number} current 当前活动的tab的index(默认 0 ) * @property {String} activeColor 激活时的颜色(默认 '#3c9cff' ) * @property {String} inactiveColor 未激活时的颜色(默认 '#303133' ) * @property {String} mode 模式选择,mode=button为按钮形式,mode=subsection时为分段模式(默认 'button' ) * @property {String | Number} fontSize 字体大小,单位px(默认 12 ) * @property {Boolean} bold 激活选项的字体是否加粗(默认 true ) * @property {String} bgColor 组件背景颜色,mode为button时有效(默认 '#eeeeef' ) * @property {Object} customStyle 定义需要用到的外部样式 * @property {String} keyName 从`list`元素对象中读取的键名(默认 'name' ) * * @event {Function} change 分段器选项发生改变时触发 回调 index:选项的index索引值,从0开始 * @example <u-subsection :list="list" :current="curNow" @change="sectionChange"></u-subsection> */ export default { name: "u-subsection", mixins: [uni.$u.mpMixin, uni.$u.mixin, props], data() { return { // 组件尺寸
itemRect: { width: 0, height: 0, }, }; }, watch: { list(newValue, oldValue) { this.init(); }, current: { immediate: true, handler(n) { // #ifdef APP-NVUE
// 在安卓nvue上,如果通过translateX进行位移,到最后一个时,会导致右侧无法绘制圆角
// 故用animation模块进行位移
const ref = this.$refs?.["u-subsection__bar"]?.ref; // 不存在ref的时候(理解为第一次初始化时,需要渲染dom,进行一定延时再获取ref),这里的100ms是经过测试得出的结果(某些安卓需要延时久一点),勿随意修改
uni.$u.sleep(ref ? 0 : 100).then(() => { animation.transition(this.$refs["u-subsection__bar"].ref, { styles: { transform: `translateX(${ n * this.itemRect.width }px)`,
transformOrigin: "center center", }, duration: 300, }); }); // #endif
}, }, }, computed: { wrapperStyle() { const style = {}; // button模式时,设置背景色
if (this.mode === "button") { style.backgroundColor = this.bgColor; } return style; }, // 滑块的样式
barStyle() { const style = {}; style.width = `${this.itemRect.width}px`; style.height = `${this.itemRect.height}px`; // 通过translateX移动滑块,其移动的距离为索引*item的宽度
// #ifndef APP-NVUE
style.transform = `translateX(${ this.current * this.itemRect.width }px)`;
// #endif
if (this.mode === "subsection") { // 在subsection模式下,需要动态设置滑块的圆角,因为移动滑块使用的是translateX,无法通过父元素设置overflow: hidden隐藏滑块的直角
style.backgroundColor = this.activeColor; } return style; }, // 分段器item的样式
itemStyle(index) { return (index) => { const style = {}; if (this.mode === "subsection") { // 设置border的样式
style.borderColor = this.activeColor; style.borderWidth = "1px"; style.borderStyle = "solid"; } return style; }; }, // 分段器文字颜色
textStyle(index) { return (index) => { const style = {}; style.fontWeight = this.bold && this.current === index ? "bold" : "normal"; style.fontSize = uni.$u.addUnit(this.fontSize); // subsection模式下,激活时默认为白色的文字
if (this.mode === "subsection") { style.color = this.current === index ? "#fff" : this.inactiveColor; } else { // button模式下,激活时文字颜色默认为activeColor
style.color = this.current === index ? this.activeColor : this.inactiveColor; } return style; }; }, }, mounted() { this.init(); }, methods: { init() { uni.$u.sleep().then(() => this.getRect()); }, // 判断展示文本
getText(item) { return typeof item === 'object' ? item[this.keyName] : item }, // 获取组件的尺寸
getRect() { // #ifndef APP-NVUE
this.$uGetRect(".u-subsection__item--0").then((size) => { this.itemRect = size; }); // #endif
// #ifdef APP-NVUE
const ref = this.$refs["u-subsection__item--0"][0]; ref && dom.getComponentRect(ref, (res) => { this.itemRect = res.size; }); // #endif
}, clickHandler(index) { this.$emit("change", index); }, }, }; </script>
<style lang="scss" scoped> @import "../../libs/css/components.scss";
.u-subsection { @include flex; position: relative; overflow: hidden; /* #ifndef APP-NVUE */ width: 100%; box-sizing: border-box; /* #endif */
&--button { height: 32px; background-color: rgb(238, 238, 239); padding: 3px; border-radius: 3px; align-items: stretch;
&__bar { background-color: #ffffff; border-radius: 3px !important; } }
&--subsection { height: 30px; }
&__bar { position: absolute; /* #ifndef APP-NVUE */ transition-property: transform, color; transition-duration: 0.3s; transition-timing-function: ease-in-out; /* #endif */
&--first { border-top-left-radius: 3px; border-bottom-left-radius: 3px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; }
&--center { border-top-left-radius: 0px; border-bottom-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; }
&--last { border-top-left-radius: 0px; border-bottom-left-radius: 0px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; } }
&__item { @include flex; flex: 1; justify-content: center; align-items: center; // vue环境下,需要设置相对定位,因为滑块为绝对定位,item需要在滑块的上面
position: relative;
&--no-border-right { border-right-width: 0 !important; }
&--first { border-top-left-radius: 3px; border-bottom-left-radius: 3px; }
&--last { border-top-right-radius: 3px; border-bottom-right-radius: 3px; }
&__text { font-size: 12px; line-height: 12px; @include flex; align-items: center; transition-property: color; transition-duration: 0.3s; } } } </style>
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