271 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			271 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| // 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)
 | ||
|                 })
 | ||
|             })
 | ||
|         }
 | ||
|     }
 | ||
| }
 |