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uni-app引入使用uView
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// nvue操作dom的库,用于获取dom的尺寸信息
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const dom = uni.requireNativePlugin('dom');
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const bindingX = uni.requireNativePlugin('bindingx');
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const animation = uni.requireNativePlugin('animation');
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export default {
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data() {
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return {
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// 所有按钮的总宽度
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buttonsWidth: 0,
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// 是否正在移动中
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moving: false
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}
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},
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computed: {
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// 获取过渡时间
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getDuratin() {
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let duration = String(this.duration)
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// 如果ms为单位,返回ms的数值部分
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if (duration.indexOf('ms') >= 0) return parseInt(duration)
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// 如果s为单位,为了得到ms的数值,需要乘以1000
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if (duration.indexOf('s') >= 0) return parseInt(duration) * 1000
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// 如果值传了数值,且小于30,认为是s单位
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duration = Number(duration)
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return duration < 30 ? duration * 1000 : duration
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}
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},
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watch: {
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show(n) {
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if(n) {
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this.moveCellByAnimation('open')
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} else {
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this.moveCellByAnimation('close')
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}
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}
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},
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mounted() {
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this.initialize()
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},
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methods: {
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initialize() {
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this.queryRect()
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},
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// 关闭单元格,用于打开一个,自动关闭其他单元格的场景
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closeHandler() {
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if(this.status === 'open') {
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// 如果在打开状态下,进行点击的话,直接关闭单元格
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return this.moveCellByAnimation('close') && this.unbindBindingX()
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}
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},
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// 点击单元格
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clickHandler() {
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// 如果在移动中被点击,进行忽略
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if(this.moving) return
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// 尝试关闭其他打开的单元格
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this.parent && this.parent.closeOther(this)
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if(this.status === 'open') {
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// 如果在打开状态下,进行点击的话,直接关闭单元格
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return this.moveCellByAnimation('close') && this.unbindBindingX()
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}
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},
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// 滑动单元格
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onTouchstart(e) {
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// 如果当前正在移动中,或者disabled状态,则返回
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if(this.moving || this.disabled) {
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return this.unbindBindingX()
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}
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if(this.status === 'open') {
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// 如果在打开状态下,进行点击的话,直接关闭单元格
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return this.moveCellByAnimation('close') && this.unbindBindingX()
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}
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// 特殊情况下,e可能不为一个对象
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e?.stopPropagation && e.stopPropagation()
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e?.preventDefault && e.preventDefault()
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this.moving = true
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// 获取元素ref
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const content = this.getContentRef()
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let expression = `min(max(${-this.buttonsWidth}, x), 0)`
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// 尝试关闭其他打开的单元格
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this.parent && this.parent.closeOther(this)
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// 阿里为了KPI而开源的BindingX
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this.panEvent = bindingX.bind({
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anchor: content,
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eventType: 'pan',
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props: [{
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element: content,
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// 绑定width属性,设置其宽度值
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property: 'transform.translateX',
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expression
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}]
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}, (res) => {
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this.moving = false
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if (res.state === 'end' || res.state === 'exit') {
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const deltaX = res.deltaX
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if(deltaX <= -this.buttonsWidth || deltaX >= 0) {
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// 如果触摸滑动的过程中,大于单元格的总宽度,或者大于0,意味着已经动过滑动达到了打开或者关闭的状态
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// 这里直接进行状态的标记
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this.$nextTick(() => {
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this.status = deltaX <= -this.buttonsWidth ? 'open' : 'close'
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})
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} else if(Math.abs(deltaX) > uni.$u.getPx(this.threshold)) {
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// 在移动大于阈值、并且小于总按钮宽度时,进行自动打开或者关闭
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// 移动距离大于0时,意味着需要关闭状态
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if(Math.abs(deltaX) < this.buttonsWidth) {
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this.moveCellByAnimation(deltaX > 0 ? 'close' : 'open')
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}
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} else {
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// 在小于阈值时,进行关闭操作(如果在打开状态下,将不会执行bindingX)
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this.moveCellByAnimation('close')
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}
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}
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})
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},
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// 释放bindingX
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unbindBindingX() {
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// 释放上一次的资源
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if (this?.panEvent?.token != 0) {
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bindingX.unbind({
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token: this.panEvent?.token,
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// pan为手势事件
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eventType: 'pan'
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})
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}
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},
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// 查询按钮节点信息
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queryRect() {
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// 历遍所有按钮数组,通过getRectByDom返回一个promise
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const promiseAll = this.options.map((item, index) => {
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return this.getRectByDom(this.$refs[`u-swipe-action-item__right__button-${index}`][0])
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})
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// 通过promise.all方法,让所有按钮的查询结果返回一个数组的形式
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Promise.all(promiseAll).then(sizes => {
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this.buttons = sizes
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// 计算所有按钮总宽度
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this.buttonsWidth = sizes.reduce((sum, cur) => sum + cur.width, 0)
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})
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},
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// 通过nvue的dom模块,查询节点信息
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getRectByDom(ref) {
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return new Promise(resolve => {
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dom.getComponentRect(ref, res => {
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resolve(res.size)
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})
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})
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},
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// 移动单元格到左边或者右边尽头
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moveCellByAnimation(status = 'open') {
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if(this.moving) return
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// 标识当前状态
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this.moveing = true
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const content = this.getContentRef()
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const x = status === 'open' ? -this.buttonsWidth : 0
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animation.transition(content, {
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styles: {
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transform: `translateX(${x}px)`,
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},
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duration: uni.$u.getDuration(this.duration, false),
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timingFunction: 'ease-in-out'
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}, () => {
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this.moving = false
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this.status = status
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this.unbindBindingX()
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})
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},
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// 获取元素ref
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getContentRef() {
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return this.$refs['u-swipe-action-item__content'].ref
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},
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beforeDestroy() {
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this.unbindBindingX()
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}
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}
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}
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