<template>
<view class="con">
<movable-area class="area" :style="{ height: areaHeight }" @mouseenter="mouseenter" @mouseleave="mouseleave">
<block v-for="(item, index) in imageList" :key="item.id">
<movable-view
class="view"
:x="item.x"
:y="item.y"
direction="all"
:damping="40"
:disabled="item.disable"
@change="onChange($event, item)"
@touchstart="touchstart(item)"
@mousedown="touchstart(item)"
@touchend="touchend(item)"
@mouseup="touchend(item)"
:style="{ width: viewWidth + 'px', height: viewWidth + 'px', 'z-index': item.zIndex, opacity: item.opacity }"
>
<view class="area-con" :style="{ width: childWidth, height: childWidth, transform: 'scale(' + item.scale + ')' }">
<image class="pre-image" :src="item.src" mode="aspectFill"></image>
<view class="del-con" @click="delImage(item, index)" @touchstart.stop="delImageMp(item, index)" @touchend.stop="nothing()" @mousedown.stop="nothing()" @mouseup.stop="nothing()">
<view class="del-wrap">
<image
class="del-image"
src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACEAAAAhCAYAAABX5MJvAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAhdEVYdENyZWF0aW9uIFRpbWUAMjAyMDowNzoyNSAyMTo1NDoyOU4TkJAAAADcSURBVFhH7ZfRCoMwDEXLvkjwwVf/bH/emmAyN6glTW9WBjsgwm28OeCLpj81Sil7zvlJ90UiONS/yY5VogsO6XrBg3IEQ5a/s8vRSWUAKmLqp2w5jz5BiNQEGMo3GbloDLtFXJ1IkaEuhAiiY6gEIqB4yqACSk9piIBiKQ8VUFpLviKg3C2rESKgWERCBZSWiEfgIfffYvrrsAgoISJ3Apy3zuTxcSxLQkV6ykNEPKVQkZEyiAiiZKgDIaC4upACSlcn5fM/+WuDCAHF1E/Z/N9AhkMZnPNDPI+UDjPIXgAQIGjNAAAAAElFTkSuQmCC"
></image>
</view>
</view>
</view>
</movable-view>
</block>
<view
class="add"
v-if="imageList.length < number"
:style="{ top: add.y, left: add.x, width: viewWidth + 'px', height: viewWidth + 'px' }"
@click="addImages"
>
<view class="add-wrap" :style="{ width: childWidth, height: childWidth }">
<image
style="width: 54rpx;height: 54rpx;"
src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADYAAAA2CAYAAACMRWrdAAABIUlEQVRoQ+2a2w2DMAxFeQzWrsMUbadAsEw3S1CqVgppKwLX8BEOP4iHTXx8uUgWdVXoVhdaV0VhSmf7vr/H8V3XzY6V3P9iD+nYOI5P7/01LMI596AwoZV0TIBXIUWFXhKLFBWYSFGhhxQN6SFFQ5i4ogITKSr0cEVDekjRECauqMBEigq9U7piOk2yAti27SUe5ljlTfPEQ6KZecTvwl4P3ytvOv06R2HDMNzes7+6aRrvnHvtf50L13Lp50rx88zcvNlS3JpwKQ67XyK04nq2nFbk/LqVjin0TvmBNgQ2S4UUDcliHgpMpKjQwxUN6SFFQ5i4ogITKSr0cEVDekjRECauqMAsVoph+hVPtYr5+03p9tbYQ96xrYtT4ootbAJGVxxVTapVswAAAABJRU5ErkJggg=="
></image>
</view>
</view>
</movable-area>
</view>
</template>
<script>
export default {
data() {
return {
imageList: [],
width: 0,
add: {
x: 0,
y: 0
},
colsValue: 0,
viewWidth: 0,
tempItem: null,
timer: null,
changeStatus: true,
preStatus: true,
}
},
props: {
// 返回排序后图片
list: {
type: Array,
default: function() {
return []
}
},
// 选择图片数量限制
number: {
type: Number,
default: 6
},
// 图片父容器宽度（实际显示的图片宽度为 imageWidth / 1.1 ），单位 rpx
imageWidth: {
type: Number,
default: 230
},
// 图片列数（cols > 0 则 imageWidth 无效）
cols: {
type: Number,
default: 0
},
// 图片周围空白填充，单位 rpx
padding: {
type: Number,
default: 10
},
// 拖动图片时放大倍数 [0, ∞)
scale: {
type: Number,
default: 1.1
},
// 拖动图片时不透明度
opacity: {
type: Number,
default: 0.7
},
// 自定义添加（需配合 @aaddImage 事件使用）
custom: {
type: Boolean,
default: false
}
},
computed: {
areaHeight() {
if (this.imageList.length < this.number) {
return Math.ceil((this.imageList.length + 1) / this.colsValue) * this.viewWidth + 'px'
} else {
return Math.ceil(this.imageList.length / this.colsValue) * this.viewWidth + 'px'
}
},
childWidth() {
return this.viewWidth - this.rpx2px(this.padding) * 2 + 'px'
},
},
created() {
this.width = uni.getSystemInfoSync().windowWidth
this.viewWidth = this.rpx2px(this.imageWidth)
},
mounted() {
const query = uni.createSelectorQuery().in(this)
query.select('.area').boundingClientRect(data => {
this.colsValue = Math.floor(data.width / this.viewWidth)
if(this.cols > 0){
this.colsValue = this.cols
this.viewWidth = data.width / this.cols
}
for (let item of this.list) {
this.addProperties(item)
}
})
query.exec()
},
methods: {
onChange(e, item) {
if(!item) return
item.oldX = e.detail.x
item.oldY = e.detail.y
if (e.detail.source === 'touch') {
if(item.moveEnd){
item.offset = Math.sqrt(Math.pow(item.oldX - item.absX * this.viewWidth, 2) + Math.pow(item.oldY - item.absY * this.viewWidth, 2))
}
let x = Math.floor((e.detail.x + this.viewWidth / 2) / this.viewWidth)
if(x >= this.colsValue) return
let y = Math.floor((e.detail.y + this.viewWidth / 2) / this.viewWidth)
let index = this.colsValue * y + x
if (item.index != index && index < this.imageList.length) {
this.changeStatus = false
for (let obj of this.imageList) {
if (item.index > index && obj.index >= index && obj.index < item.index) {
this.change(obj, 1)
} else if (item.index < index && obj.index <= index && obj.index > item.index) {
this.change(obj, -1)
} else if(obj.id != item.id) {
obj.offset = 0
obj.x = obj.oldX
obj.y = obj.oldY
setTimeout(() => {
this.$nextTick(() => {
obj.x = obj.absX * this.viewWidth
obj.y = obj.absY * this.viewWidth
})
}, 0)
}
}
item.index = index
item.absX = x
item.absY = y
this.sortList()
}
}
},
change(obj, i){
obj.index += i
obj.offset = 0
obj.x = obj.oldX
obj.y = obj.oldY
obj.absX = obj.index % this.colsValue
obj.absY = Math.floor(obj.index / this.colsValue)
setTimeout(() => {
this.$nextTick(() => {
obj.x = obj.absX * this.viewWidth
obj.y = obj.absY * this.viewWidth
})
}, 0)
},
touchstart(item) {
this.imageList.forEach(v => {
v.zIndex = v.index + 9
})
item.zIndex = 99
item.moveEnd = true
this.tempItem = item
this.timer = setTimeout(() => {
item.scale = this.scale
item.opacity = this.opacity
clearTimeout(this.timer)
this.timer = null
}, 200)
},
touchend(item) {
this.previewImage(item)
item.scale = 1
item.opacity = 1
item.x = item.oldX
item.y = item.oldY
item.offset = 0
item.moveEnd = false
setTimeout(() => {
this.$nextTick(() => {
item.x = item.absX * this.viewWidth
item.y = item.absY * this.viewWidth
this.tempItem = null
this.changeStatus = true
})
}, 0)
},
previewImage(item){
if(this.timer && this.preStatus && this.changeStatus && item.offset < 28.28){
clearTimeout(this.timer)
this.timer = null
let src = this.list.findIndex(v => v === item.src)
uni.previewImage({
urls: this.list,
current: src,
success: () => {
this.preStatus = false
setTimeout(() => {
this.preStatus = true
}, 600)
}
})
} else if (this.timer){
clearTimeout(this.timer)
this.timer = null
}
},
mouseenter(){
//#ifdef H5
this.imageList.forEach(v => {
v.disable = false
})
//#endif
},
mouseleave(){
//#ifdef H5
if(this.tempItem){
this.imageList.forEach(v => {
v.disable = true
v.zIndex = v.index + 9
v.offset = 0
v.moveEnd = false
if(v.id == this.tempItem.id){
if (this.timer){
clearTimeout(this.timer)
this.timer = null
}
v.scale = 1
v.opacity = 1
v.x = v.oldX
v.y = v.oldY
this.$nextTick(() => {
v.x = v.absX * this.viewWidth
v.y = v.absY * this.viewWidth
this.tempItem = null
})
}
})
this.changeStatus = true
}
//#endif
},
addImages() {
if(this.custom){
this.$emit('addImage')
} else {
let checkNumber = this.number - this.imageList.length
uni.chooseImage({
count: checkNumber,
sourceType: ['album', 'camera'],
success: res => {
let count = checkNumber <= res.tempFilePaths.length ? checkNumber : res.tempFilePaths.length
for (let i = 0; i < count; i++) {
this.addProperties(res.tempFilePaths[i])
}
}
})
}
},
addImage(image){
this.addProperties(image)
},
delImage(item, index){
this.imageList.splice(index, 1)
for (let obj of this.imageList) {
if (obj.index > item.index) {
obj.index -= 1
obj.x = obj.oldX
obj.y = obj.oldY
obj.absX = obj.index % this.colsValue
obj.absY = Math.floor(obj.index / this.colsValue)
this.$nextTick(() => {
obj.x = obj.absX * this.viewWidth
obj.y = obj.absY * this.viewWidth
})
}
}
this.add.x = (this.imageList.length % this.colsValue) * this.viewWidth + 'px'
this.add.y = Math.floor(this.imageList.length / this.colsValue) * this.viewWidth + 'px'
this.sortList()
},
delImageMp(item, index){
//#ifdef MP
this.delImage(item, index)
//#endif
},
sortList() {
let list = this.imageList.slice()
list.sort((a, b) => {
return a.index - b.index
})
for (let i = 0; i < list.length; i++) {
list[i] = list[i].src
}
this.$emit('update:list', list)
},
addProperties(item){
let absX = this.imageList.length % this.colsValue
let absY = Math.floor(this.imageList.length / this.colsValue)
let x = absX * this.viewWidth
let y = absY * this.viewWidth
this.imageList.push({
src: item,
x,
y,
oldX: x,
oldY: y,
absX,
absY,
scale: 1,
zIndex: 9,
opacity: 1,
index: this.imageList.length,
id: this.guid(),
disable: false,
offset: 0,
moveEnd: false
})
this.add.x = (this.imageList.length % this.colsValue) * this.viewWidth + 'px'
this.add.y = Math.floor(this.imageList.length / this.colsValue) * this.viewWidth + 'px'
this.sortList()
},
nothing(){},
rpx2px(v){
return this.width * v / 750
},
guid() {
function S4() {
return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
}
return (S4() + S4() + "-" + S4() + "-" + S4() + "-" + S4() + "-" + S4() + S4() + S4());
}
}
}
</script>
<style lang="scss" scoped>
.con {
// padding: 30rpx;
.area {
width: 100%;
.view {
display: flex;
justify-content: center;
align-items: center;
.area-con {
position: relative;
.pre-image {
width: 100%;
height: 100%;
}
.del-con {
position: absolute;
top: 0rpx;
right: 0rpx;
padding: 0 0 20rpx 20rpx;
.del-wrap {
width: 36rpx;
height: 36rpx;
background-color: rgba(0, 0, 0, 0.4);
border-radius: 0 0 0 10rpx;
display: flex;
justify-content: center;
align-items: center;
.del-image {
width: 20rpx;
height: 20rpx;
}
}
}
}
}
.add {
position: absolute;
display: flex;
justify-content: center;
align-items: center;
.add-wrap{
display: flex;
justify-content: center;
align-items: center;
background-color: #eeeeee;
}
}
}
}
</style>