| <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> |