yunshangxie/tuniao-ui/components/tn-custom-swiper-item/tn-custom-swiper-item.vue

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<template>
<!-- #ifdef MP-WEIXIN -->
<view
class="tn-c-swiper-item"
:style="[swiperStyle]"
:itemData="itemData"
:currentIndex="currentIndex"
:containerData="containerData"
:change:itemData="wxs.itemDataObserver"
:change:currentIndex="wxs.currentIndexObserver"
:change:containerData="wxs.containerDataObserver"
@touchstart="wxs.touchStart"
:catch:touchmove="touching?wxs.touchMove:''"
:catch:touchend="touching?wxs.touchEnd:''"
>
<view class="item__container tn-c-swiper-item__container" :style="[containerStyle]">
<slot></slot>
</view>
</view>
<!-- #endif -->
<!-- #ifndef MP-WEIXIN -->
<view
class="tn-c-swiper-item"
:style="[swiperStyle]"
:itemData="itemData"
:currentIndex="currentIndex"
:containerData="containerData"
:change:itemData="wxs.itemDataObserver"
:change:currentIndex="wxs.currentIndexObserver"
:change:containerData="wxs.containerDataObserver"
@touchstart="wxs.touchStart"
@touchmove="wxs.touchMove"
@touchend="wxs.touchEnd"
>
<view class="item__container tn-c-swiper-item__container" :style="[containerStyle]">
<slot></slot>
</view>
</view>
<!-- #endif -->
</template>
<script src="./index.wxs" lang="wxs" module="wxs"></script>
<script>
export default {
name: 'tn-custom-swiper-item',
props: {
},
computed: {
// swiperItem公共数据
itemData() {
return {
index: this.index,
itemWidth: this.itemWidth,
itemHeight: this.itemHeight,
itemTop: this.itemTop,
itemLeft: this.itemLeft
}
},
currentIndex() {
return this.parentData.currentIndex
},
containerData() {
return {
duration: this.parentData.duration,
animationFinish: this.parentData.swiperContainerAnimationFinish,
circular: this.parentData.circular,
swiperItemLength: this.swiperItemLength,
vertical: this.parentData.vertical
}
},
swiperStyle() {
let style = {}
style.transform = `translate3d(${this.translateX}%, ${this.translateY}%, 0px)`
return style
},
containerStyle() {
let style = {}
if (this.parentData.customSwiperStyle && Object.keys(this.parentData.customSwiperStyle).length > 0) {
style = this.parentData.customSwiperStyle
}
if ((this.currentIndex === 0 && this.index === this.swiperItemLength - 1) || (this.index === this.currentIndex - 1) &&
(this.parentData.prevSwiperStyle && Object.keys(this.parentData.prevSwiperStyle).length > 0)
) {
// 前一个swiperItem
const copyStyle = JSON.parse(JSON.stringify(style))
style = Object.assign(copyStyle, this.parentData.prevSwiperStyle)
}
if ((this.currentIndex === this.swiperItemLength - 1 && this.index === 0) || (this.index === this.currentIndex + 1) &&
(this.parentData.nextSwiperStyle && Object.keys(this.parentData.nextSwiperStyle).length > 0)
) {
// 后一个swiperItem
const copyStyle = JSON.parse(JSON.stringify(style))
style = Object.assign(copyStyle, this.parentData.nextSwiperStyle)
}
return style
}
},
data() {
return {
// 父组件参数
parentData: {
duration: 500,
currentIndex: 0,
swiperContainerAnimationFinish: false,
circular: false,
vertical: false,
prevSwiperStyle: {},
customSwiperStyle: {},
nextSwiperStyle: {}
},
// 标记当前是否正在触摸
touching: true,
// 当前swiperItem的偏移位置
translateX: 0,
translateY: 0,
// 当前swiperItem的宽高
itemWidth: 0,
itemHeight: 0,
// 当前swiperItem的位置信息
itemTop: 0,
itemLeft: 0,
// 当前swiperItem的状态 prev current next
status: 'current',
// 当前swiperItem的index序号
index: 0,
// swiperItem的的数量
swiperItemLength: 0
}
},
created() {
this.parent = false
this.updateParentData()
// 获取当前父组件children的数量作为当前swiperItem的序号
this.index = this.parent.children.length
this.parent && this.parent.children.push(this)
},
mounted() {
this.$nextTick(() => {
this.initSwiperItem()
})
},
methods: {
// 初始化swiperItem
initSwiperItem() {
this.getSwiperItemRect(() => {
this.parent.updateAllSwiperItemStyle()
this.parentData.swiperContainerAnimationFinish = true
})
},
// 获取swiperItem的信息
async getSwiperItemRect(callback) {
const swiperItemRes = await this._tGetRect('.tn-c-swiper-item')
if (!swiperItemRes.height || !swiperItemRes.width) {
setTimeout(() => {
this.getSwiperItemRect()
}, 30)
return
}
this.itemWidth = swiperItemRes.width
this.itemHeight = swiperItemRes.height
this.itemTop = swiperItemRes.top
this.itemLeft = swiperItemRes.left
callback && callback()
},
// 更新swiperItem样式
updateSwiperItemStyle(swiperItemLength, currentIndex = undefined) {
currentIndex = currentIndex != undefined ? currentIndex : this.parentData.currentIndex
this.swiperItemLength = swiperItemLength
// 根据当前swiperItem的序号设置偏移位置
// 判断当前swiperItem是否为第一个如果是则将最后的swiperItem移动到当前的前一个位置即最前面
if (currentIndex === 0 && this.index === swiperItemLength - 1) {
if (this.parentData.vertical) {
this.translateX = 0
this.translateY = -100
} else {
this.translateX = -100
this.translateY = 0
}
}
// 判断当前swiperItem是否为最后一个如果是则将最前的swiperItem移动到当前的后一个位置即最后面
else if (currentIndex === swiperItemLength - 1 && this.index === 0) {
if (this.parentData.vertical) {
this.translateX = 0
this.translateY = swiperItemLength * 100
} else {
this.translateX = swiperItemLength * 100
this.translateY = 0
}
}
// 正常情况
else {
if (this.parentData.vertical) {
this.translateX = 0
this.translateY = this.index * 100
} else {
this.translateX = this.index * 100
this.translateY = 0
}
}
},
// 更新父组件的偏移位置信息
updateParentSwiperContainerStyle(e) {
this.parent.updateSwiperContainerStyleWithValue(e.value)
},
// 根据方向更新父组件的偏移位置信息
updateParentSwiperContainerStyleWithDirection(e) {
this.parent.updateSwiperContainerStyleWithDirection(e.direction)
},
// 修改父组件的偏移位置的状态
changeParentSwiperContainerStyleStatus(e) {
// reset -> 重置 reload -> 重载
this.parent.updateSwiperContainerStyleWithDirection(e.status)
},
// 更新父组件信息
updateParentData() {
this.getParentData('tn-custom-swiper')
},
// 更新触摸状态
updateTouchingStatus(e) {
this.touching = e.status
if (e.status) {
this.parent.stopAutoPlay()
} else {
this.parent.startAutoPlay()
}
},
// 提取对应用户自定义样式
extractCustomStyle(customStyle) {
let data = {
transform: {},
style: {}
}
if (!customStyle) return data
// 允许设置的transform参数
const allowTransformProps = ['scale','scaleX','scaleY','scaleZ','rotate','rotateX','rotateY','rotateZ']
for (let prop in customStyle) {
if (prop.startsWith('transformProp')) {
// transform里面的样式
let transformProp = prop.substring('transformProp'.length)
const index = allowTransformProps.findIndex((item) => {
return item.toLowerCase() === transformProp.toLowerCase()
})
if (index !== -1) {
transformProp = allowTransformProps[index]
data.transform[transformProp] = customStyle[prop]
}
} else {
// 普通样式
data.style[prop] = customStyle[prop]
}
}
return data
}
}
}
</script>
<style lang="scss" scoped>
.tn-c-swiper-item {
width: 100%;
height: 100%;
position: absolute;
display: block;
will-change: transform;
cursor: none;
transform: translate3d(0px, 0px, 0px);
.item__container {
width: 100%;
height: 100%;
display: block;
position: absolute;
}
}
</style>