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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')
import { sleep } from '@/uni_modules/uv-ui-tools/libs/function/index.js'
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) {
}
}
},
mounted() {
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.$refs['uv-swipe-action-item__content'].ref, {
styles: {
transform: `translateX(${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.$refs[`uv-swipe-action-item__right__button-${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['uv-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.$refs[`uv-swipe-action-item__right__button-${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.$refs['uv-swipe-action-item__content'].ref, {
styles: {
transform: `translateX(${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.$refs[`uv-swipe-action-item__right__button-${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[`uv-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)
})
})
}
}
}