c7add6cf
 “wangming”
初始版本开发完毕
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<template>
<view class="imageUploadContainer">
<view class="imageUploadList">
<view class="imageItem" v-bind:key="index" v-for="(path,index) in imageListData">
<image :src="BASE_URL+path.url" :class="{'dragging':isDragging(index)}" draggable="true"
@tap="previewImage" :data-index="index" @touchstart="start" @touchmove.stop.prevent="move"
@touchend="stop"></image>
<view v-if="isShowDel" class="imageDel" @tap="deleteImage" :data-index="index">x</view>
</view>
<view v-if="isShowAdd" class="imageUpload" style="border: 0px;" @tap="selectImage">
<image src="/static/voucher_bg.png" class="imageUpload" style="border: 0px;"></image>
</view>
</view>
<image v-if="showMoveImage" class="moveImage" :style="{left:posMoveImageLeft, top:posMoveImageTop}"
:src="moveImagePath"></image>
</view>
</template>
<script>
import BASE_URL from '@/common/config.js'
export default {
name: 'robby-image-upload',
props: ['value', 'enableDel', 'enableAdd', 'enableDrag', 'serverUrl', 'formData', 'header', 'limit', 'fileKeyName',
'showUploadProgress', 'serverUrlDeleteImage'
],
data() {
return {
BASE_URL,
imageBasePos: {
x0: -1,
y0: -1,
w: -1,
h: -1,
},
showMoveImage: false,
moveImagePath: '',
moveLeft: 0,
moveTop: 0,
deltaLeft: 0,
deltaTop: 0,
dragIndex: null,
targetImageIndex: null,
imageList: [],
isDestroyed: false
}
},
mounted: function() {
this.imageList = this.value
if (this.showUploadProgress === false) {
this.showUploadProgress = false
} else {
this.showUploadProgress = true
}
},
destroyed: function() {
this.isDestroyed = true
},
computed: {
imageListData: function() {
if (this.value) {
return this.value
}
},
posMoveImageLeft: function() {
return this.moveLeft + 'px'
},
posMoveImageTop: function() {
return this.moveTop + 'px'
},
isShowDel: function() {
if (this.enableDel === false) {
return false
} else {
return true
}
},
isShowAdd: function() {
if (this.enableAdd === false) {
return false
}
if (this.limit && this.imageList.length >= this.limit) {
return false
}
return true
},
isDragable: function() {
if (this.enableDrag === false) {
return false
} else {
return true
}
}
},
methods: {
selectImage: function() {
var _self = this
if (!_self.imageList) {
_self.imageList = []
}
uni.chooseImage({
count: _self.limit ? (_self.limit - _self.imageList.length) : 999,
success: function(e) {
var imagePathArr = e.tempFilePaths
//如果设置了limit限制，在web上count参数无效，这里做判断控制选择的数量是否合要求
//在非微信小程序里，虽然可以选多张，但选择的结果会被截掉
//在app里，会自动做选择数量的限制
if (_self.limit) {
var availableImageNumber = _self.limit - _self.imageList.length
if (availableImageNumber < imagePathArr.length) {
uni.showToast({
title: '图片总数限制为' + _self.limit + '张，当前还可以选' +
availableImageNumber + '张',
icon: 'none',
mask: false,
duration: 2000
});
return
}
}
//检查服务器地址是否设置，设置即表示图片要上传到服务器
if (_self.serverUrl) {
uni.showToast({
title: '上传进度：0/' + imagePathArr.length,
icon: 'none',
mask: false
});
var remoteIndexStart = _self.imageList.length - imagePathArr.length
var promiseWorkList = []
var keyname = (_self.fileKeyName ? _self.fileKeyName : 'upload-images')
var completeImages = 0
for (let i = 0; i < imagePathArr.length; i++) {
promiseWorkList.push(new Promise((resolve, reject) => {
let remoteUrlIndex = remoteIndexStart + i
uni.uploadFile({
url: _self.serverUrl,
fileType: 'image',
header: _self.header,
formData: _self.formData,
filePath: imagePathArr[i],
name: keyname,
success: function(res) {
if (res.statusCode === 200) {
if (_self.isDestroyed) {
return
}
completeImages++
if (_self.showUploadProgress) {
uni.showToast({
title: '上传进度：' +
completeImages +
'/' +
imagePathArr
.length,
icon: 'none',
mask: false,
duration: 500
});
}
console.log(
'success to upload image: ' +
res.data)
resolve(res.data)
} else {
console.log(
'fail to upload image:' +
res.data)
reject('fail to upload image:' +
remoteUrlIndex)
}
},
fail: function(res) {
console.log('fail to upload image:' +
res)
reject('fail to upload image:' +
remoteUrlIndex)
}
})
}))
}
Promise.all(promiseWorkList).then((result) => {
if (_self.isDestroyed) {
return
}
for (let i = 0; i < result.length; i++) {
_self.imageList.push(JSON.parse(result[i]).data)
}
_self.$emit('add', {
currentImages: imagePathArr,
allImages: _self.imageList
})
_self.$emit('input', _self.imageList)
})
} else {
for (let i = 0; i < imagePathArr.length; i++) {
_self.imageList.push(imagePathArr[i])
}
_self.$emit('add', {
currentImages: imagePathArr,
allImages: _self.imageList
})
_self.$emit('input', _self.imageList)
}
}
})
},
deleteImage: function(e) {
var imageIndex = e.currentTarget.dataset.index
var deletedImagePath = this.imageList[imageIndex]
this.imageList.splice(imageIndex, 1)
//检查删除图片的服务器地址是否设置，如果设置则调用API，在服务器端删除该图片
if (this.serverUrlDeleteImage) {
uni.request({
url: this.serverUrlDeleteImage,
method: 'GET',
data: {
imagePath: deletedImagePath
},
success: res => {
console.log(res.data)
}
});
}
this.$emit('delete', {
currentImage: deletedImagePath,
allImages: this.imageList
})
this.$emit('input', this.imageList)
},
previewImage: function(e) {
var imageIndex = e.currentTarget.dataset.index
uni.previewImage({
current: this.imageList[imageIndex],
indicator: "number",
loop: "true",
urls: this.imageList
})
},
initImageBasePos: function() {
let paddingRate = 0.024
var _self = this
//计算图片基准位置
uni.getSystemInfo({
success: function(obj) {
let screenWidth = obj.screenWidth
let leftPadding = Math.ceil(paddingRate * screenWidth)
let imageWidth = Math.ceil((screenWidth - 2 * leftPadding) / 4)
_self.imageBasePos.x0 = leftPadding
_self.imageBasePos.w = imageWidth
_self.imageBasePos.h = imageWidth
}
})
},
findOverlapImage: function(posX, posY) {
let rows = Math.floor((posX - this.imageBasePos.x0) / this.imageBasePos.w)
let cols = Math.floor((posY - this.imageBasePos.y0) / this.imageBasePos.h)
let indx = cols * 4 + rows
return indx
},
isDragging: function(indx) {
return this.dragIndex === indx
},
start: function(e) {
console.log(this.isDragable)
if (!this.isDragable) {
return
}
this.dragIndex = e.currentTarget.dataset.index
this.moveImagePath = this.imageList[this.dragIndex]
this.showMoveImage = true
//计算纵向图片基准位置
if (this.imageBasePos.y0 === -1) {
this.initImageBasePos()
let basePosY = Math.floor(this.dragIndex / 4) * this.imageBasePos.h
let currentImageOffsetTop = e.currentTarget.offsetTop
this.imageBasePos.y0 = currentImageOffsetTop - basePosY
}
//设置选中图片当前左上角的坐标
this.moveLeft = e.target.offsetLeft
this.moveTop = e.target.offsetTop
},
move: function(e) {
if (!this.isDragable) {
return
}
const touch = e.touches[0]
this.targetImageIndex = this.findOverlapImage(touch.clientX, touch.clientY)
//初始化deltaLeft/deltaTop
if (this.deltaLeft === 0) {
this.deltaLeft = touch.clientX - this.moveLeft
this.deltaTop = touch.clientY - this.moveTop
}
//设置移动图片位置
this.moveLeft = touch.clientX - this.deltaLeft
this.moveTop = touch.clientY - this.deltaTop
},
stop: function(e) {
if (!this.isDragable) {
return
}
if (this.dragIndex !== null && this.targetImageIndex !== null) {
if (this.targetImageIndex < 0) {
this.targetImageIndex = 0
}
if (this.targetImageIndex >= this.imageList.length) {
this.targetImageIndex = this.imageList.length - 1
}
//交换图片
if (this.dragIndex !== this.targetImageIndex) {
this.imageList[this.dragIndex] = this.imageList[this.targetImageIndex]
this.imageList[this.targetImageIndex] = this.moveImagePath
}
}
this.dragIndex = null
this.targetImageIndex = null
this.deltaLeft = 0
this.deltaTop = 0
this.showMoveImage = false
this.$emit('input', this.imageList)
}
}
}
</script>
<style>
.imageUploadContainer {
padding: 10upx 5upx;
margin: 10upx 5upx;
}
.dragging {
transform: scale(1.2)
}
.imageUploadList {
display: flex;
flex-wrap: wrap;
}
.imageItem, .imageUpload {
width: 160rpx;
height: 160rpx;
border-radius: 10rpx;
margin-right: 20rpx;
}
.imageDel {
position: relative;
left: 120upx;
bottom: 165upx;
background-color: rgba(0, 0, 0, 0.5);
width: 36upx;
text-align: center;
line-height: 35upx;
border-radius: 17upx;
color: white;
font-size: 30upx;
padding-bottom: 2upx;
}
.imageItem image, .moveImage {
width: 160upx;
height: 160upx;
border-radius: 8upx;
}
.imageUpload {
line-height: 130upx;
text-align: center;
font-size: 150upx;
color: #D9D9D9;
border: 1px solid #D9D9D9;
border-radius: 8upx;
}
.moveImage {
position: absolute;
}
</style>
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