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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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