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- // nvue操作dom的库,用于获取dom的尺寸信息
- const dom = uni.requireNativePlugin('dom')
- // nvue中用于操作元素动画的库,类似于uni.animation,只不过uni.animation不能用于nvue
- const animation = uni.requireNativePlugin('animation')
- export default {
- data() {
- return {
- // 是否滑动中
- moving: false,
- // 状态,open-打开状态,close-关闭状态
- status: 'close',
- // 开始触摸点的X和Y轴坐标
- startX: 0,
- startY: 0,
- // 所有隐藏按钮的尺寸信息数组
- buttons: [],
- // 所有按钮的总宽度
- buttonsWidth: 0,
- // 记录上一次移动的位置值
- moveX: 0,
- // 记录上一次滑动的位置,用于前后两次做对比,如果移动的距离小于某一阈值,则认为前后之间没有移动,为了解决可能存在的通信阻塞问题
- lastX: 0
- }
- },
- computed: {
- // 获取过渡时间
- getDuratin() {
- let duration = String(this.duration)
- // 如果ms为单位,返回ms的数值部分
- if (duration.indexOf('ms') >= 0) return parseInt(duration)
- // 如果s为单位,为了得到ms的数值,需要乘以1000
- if (duration.indexOf('s') >= 0) return parseInt(duration) * 1000
- // 如果值传了数值,且小于30,认为是s单位
- duration = Number(duration)
- return duration < 30 ? duration * 1000 : duration
- }
- },
- watch: {
- show: {
- immediate: true,
- handler(n) {
- // if(n === true) {
- // uni.$u.sleep(50).then(() => {
- // this.openSwipeAction()
- // })
- // } else {
- // this.closeSwipeAction()
- // }
- }
- }
- },
- mounted() {
- uni.$u.sleep(20).then(() => {
- this.queryRect()
- })
- },
- methods: {
- close() {
- this.closeSwipeAction()
- },
- // 触摸单元格
- touchstart(event) {
- if (this.disabled) return
- this.closeOther()
- const { touches } = event
- // 记录触摸开始点的坐标值
- this.startX = touches[0].pageX
- this.startY = touches[0].pageY
- },
- // // 触摸滑动
- touchmove(event) {
- if (this.disabled) return
- const { touches } = event
- const { pageX } = touches[0]
- const { pageY } = touches[0]
- let moveX = pageX - this.startX
- const moveY = pageY - this.startY
- const { buttonsWidth } = this
- const len = this.buttons.length
- // 判断前后两次的移动距离,如果小于一定值,则不进行移动处理
- if (Math.abs(pageX - this.lastX) < 0.3) return
- this.lastX = pageX
- // 移动的X轴距离大于Y轴距离,也即终点与起点位置连线,与X轴夹角小于45度时,禁止页面滚动
- if (Math.abs(moveX) > Math.abs(moveY) || Math.abs(moveX) > this.threshold) {
- event.stopPropagation()
- }
- // 如果移动的X轴距离小于Y轴距离,也即终点位置与起点位置连线,与Y轴夹角小于45度时,认为是页面上下滑动,而不是左右滑动单元格
- if (Math.abs(moveX) < Math.abs(moveY)) return
- // 限制右滑的距离,不允许内容部分往右偏移,右滑会导致X轴偏移值大于0,以此做判断
- // 此处不能直接return,因为滑动过程中会缺失某些关键点坐标,会导致错乱,最好的办法就是
- // 在超出后,设置为0
- if (this.status === 'open') {
- // 在开启状态下,向左滑动,需忽略
- if (moveX < 0) moveX = 0
- // 想要收起菜单,最大能移动的距离为按钮的总宽度
- if (moveX > buttonsWidth) moveX = buttonsWidth
- // 如果是已经打开了的状态,向左滑动时,移动收起菜单
- this.moveSwipeAction(-buttonsWidth + moveX)
- } else {
- // 关闭状态下,右滑动需忽略
- if (moveX > 0) moveX = 0
- // 滑动的距离不允许超过所有按钮的总宽度,此时只能是左滑,最终设置按钮的总宽度,同时为负数
- if (Math.abs(moveX) > buttonsWidth) moveX = -buttonsWidth
- // 只要是在滑过程中,就不断移动菜单的内容部分,从而使隐藏的菜单显示出来
- this.moveSwipeAction(moveX)
- }
- },
- // 单元格结束触摸
- touchend(event) {
- if (this.disabled) return
- const touches = event.changedTouches ? event.changedTouches[0] : {}
- const { pageX } = touches
- const { pageY } = touches
- const { buttonsWidth } = this
- this.moveX = pageX - this.startX
- if (this.status === 'open') {
- // 在展开的状态下,继续左滑,无需操作
- if (this.moveX < 0) this.moveX = 0
- if (this.moveX > buttonsWidth) this.moveX = buttonsWidth
- // 在开启状态下,点击一下内容区域,moveX为0,也即没有进行移动,这时执行收起菜单逻辑
- if (this.moveX === 0) {
- return this.closeSwipeAction()
- }
- // 在开启状态下,滑动距离小于阈值,则默认为不关闭,同时恢复原来的打开状态
- if (Math.abs(this.moveX) < this.threshold) {
- this.openSwipeAction()
- } else {
- // 如果滑动距离大于阈值,则执行收起逻辑
- this.closeSwipeAction()
- }
- } else {
- // 在关闭的状态下,右滑,无需操作
- if (this.moveX >= 0) this.moveX = 0
- if (this.moveX <= -buttonsWidth) this.moveX = -buttonsWidth
- // 理由同上
- if (Math.abs(this.moveX) < this.threshold) {
- this.closeSwipeAction()
- } else {
- this.openSwipeAction()
- }
- }
- },
- // 移动滑动选择器内容区域,同时显示出其隐藏的菜单
- moveSwipeAction(moveX) {
- if (this.moving) return
- this.moving = true
- let previewButtonsMoveX = 0
- const len = this.buttons.length
- animation.transition(this.$refs['u-swipe-action-item__content'].ref, {
- styles: {
- transform: `translateX(${moveX}px)`
- },
- timingFunction: 'linear'
- }, () => {
- this.moving = false
- })
- // 按钮的组的长度
- for (let i = len - 1; i >= 0; i--) {
- const buttonRef = this.$refs[`u-swipe-action-item__right__button-${i}`][0].ref
- // 通过比例,得出元素自身该移动的距离
- const translateX = this.buttons[i].width / this.buttonsWidth * moveX
- // 最终移动的距离,是通过自身比例算出的距离,再加上在它之前所有按钮移动的距离之和
- const realTranslateX = translateX + previewButtonsMoveX
- animation.transition(buttonRef, {
- styles: {
- transform: `translateX(${realTranslateX}px)`
- },
- duration: 0,
- delay: 0,
- timingFunction: 'linear'
- }, () => {})
- // 记录本按钮之前的所有按钮的移动距离之和
- previewButtonsMoveX += translateX
- }
- },
- // 关闭菜单
- closeSwipeAction() {
- if (this.status === 'close') return
- this.moving = true
- const { buttonsWidth } = this
- animation.transition(this.$refs['u-swipe-action-item__content'].ref, {
- styles: {
- transform: 'translateX(0px)'
- },
- duration: this.getDuratin,
- timingFunction: 'ease-in-out'
- }, () => {
- this.status = 'close'
- this.moving = false
- this.closeHandler()
- })
- // 按钮的组的长度
- const len = this.buttons.length
- for (let i = len - 1; i >= 0; i--) {
- const buttonRef = this.$refs[`u-swipe-action-item__right__button-${i}`][0].ref
- // 如果不满足边界条件,返回
- if (this.buttons.length === 0 || !this.buttons[i] || !this.buttons[i].width) return
- animation.transition(buttonRef, {
- styles: {
- transform: 'translateX(0px)'
- },
- duration: this.getDuratin,
- timingFunction: 'ease-in-out'
- }, () => {})
- }
- },
- // 打开菜单
- openSwipeAction() {
- if (this.status === 'open') return
- this.moving = true
- const buttonsWidth = -this.buttonsWidth
- let previewButtonsMoveX = 0
- animation.transition(this.$refs['u-swipe-action-item__content'].ref, {
- styles: {
- transform: `translateX(${buttonsWidth}px)`
- },
- duration: this.getDuratin,
- timingFunction: 'ease-in-out'
- }, () => {
- this.status = 'open'
- this.moving = false
- this.openHandler()
- })
- // 按钮的组的长度
- const len = this.buttons.length
- for (let i = len - 1; i >= 0; i--) {
- const buttonRef = this.$refs[`u-swipe-action-item__right__button-${i}`][0].ref
- // 如果不满足边界条件,返回
- if (this.buttons.length === 0 || !this.buttons[i] || !this.buttons[i].width) return
- // 通过比例,得出元素自身该移动的距离
- const translateX = this.buttons[i].width / this.buttonsWidth * buttonsWidth
- // 最终移动的距离,是通过自身比例算出的距离,再加上在它之前所有按钮移动的距离之和
- const realTranslateX = translateX + previewButtonsMoveX
- animation.transition(buttonRef, {
- styles: {
- transform: `translateX(${realTranslateX}px)`
- },
- duration: this.getDuratin,
- timingFunction: 'ease-in-out'
- }, () => {})
- previewButtonsMoveX += translateX
- }
- },
- // 查询按钮节点信息
- queryRect() {
- // 历遍所有按钮数组,通过getRectByDom返回一个promise
- const promiseAll = this.rightOptions.map((item, index) => this.getRectByDom(this.$refs[`u-swipe-action-item__right__button-${index}`][0]))
- // 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
- Promise.all(promiseAll).then((sizes) => {
- this.buttons = sizes
- // 计算所有按钮总宽度
- this.buttonsWidth = sizes.reduce((sum, cur) => sum + cur.width, 0)
- })
- },
- // 通过nvue的dom模块,查询节点信息
- getRectByDom(ref) {
- return new Promise((resolve) => {
- dom.getComponentRect(ref, (res) => {
- resolve(res.size)
- })
- })
- }
- }
- }
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