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生成的临时路径是没有完整的路径没办法上传到服务器
- 16:37:40.993 添加水印后的路径, _doc/uniapp_temp_1710923708347/canvas/17109238597881.png
- 16:37:41.041 添加水印后的完整路径, file://storage/emulated/0/Android/data/com.jingruan.zjd/apps/__UNI__BE4B000/doc/uniapp_temp_1710923708347/canvas/17109238597881.png
使用以下代码得到完整的路径
let path = 'file:/' + plus.io.convertLocalFileSystemURL(tempFilePath);
完整代码如下 使用的插件市场的hpy-watermark组件 一共2个
效果是
其他页面调用方式
- <!--
- 增加水印上传villageReviewForm.preciseAddr 是通过高德获取的定位地址
- -->
- <hpy-watermark ref="uploadImage" :address="villageReviewForm.preciseAddr" @waterMark="waterMark"></hpy-watermark>
高德获取定位
- uni.getLocation({
- type: 'gcj02',
- geocode: true,
- isHighAccuracy: true,
- success: res => {
- const {
- province,
- city,
- district,
- street,
- streetNum,
- poiName
- } = res.address;
- this.villageReviewForm.preciseAddr =
- `${district}${street}${streetNum}${poiName}${res.longitude},${res.latitude}`;
- console.log("经纬度地点",this.villageReviewForm.preciseAddr)
- // 数据渲染
- this.$forceUpdate();
- }
- });

获取上传数据结果
const fileList = this.$refs.uploadImage.fileList
组件样式
hpy-watermark.vue
- <template>
- <view>
- <view class="watermark-content">
- <canvas canvas-id="watermarkCanvas" id="watermarkCanvas" :style="{width:canvasWidth + 'px', height:canvasHeight + 'px'}"></canvas>
- </view>
- <upload-image v-model="fileList" style="margin-left: 15rpx" :image-styles="imageStyles" :files-list="filesList" :delIcon="delIcon" @choose="chooseImage" @delFile="delFile">
- <slot>
- <view class="is-add">
- <view class="icon-add"></view>
- <view class="icon-add rotate"></view>
- </view>
- </slot>
- </upload-image>
- </view>
- </template>
-
- <script>
- import {
- fileServerIp
- } from "@/common/utils/config.js"
- import Session from "@/common/Session";
- import uploadImage from './upload-image.vue'
- export default {
- components: {
- uploadImage,
- },
- name:'hpy-watermark',
- props:{
- address:{
- type:String,
- default:''
- },
- delIcon: {
- type: Boolean,
- default: true
- },
-
- listStyles: {
- type: Object,
- default () {
- return {
- // 是否显示边框
- border: true,
- // 是否显示分隔线
- dividline: true,
- // 线条样式
- borderStyle: {}
- }
- }
- },
- imageStyles: {
- type: Object,
- default () {
- return {
- width: 'auto',
- height: 'auto'
- }
- }
- },
- /**
- * 文字文字位置(默认:左下角)可选值:左上角:topLeft、右上角:topRight、左下角:bottomLeft、右下角:bottomRight
- */
- markAlign:{
- type:String,
- default:function(){
- return 'bottomLeft'
- }
- },
- /**
- * 设置文本的水平对齐方式,默认:start,文本在指定的位置开始。
- * end 文本在指定的位置结束。
- * center 文本的中心被放置在指定的位置。
- * left 文本左对齐。
- * right 文本右对齐。
- */
- textAlign:{
- type:String,
- default:function(){
- return 'start';
- }
- },
- /**
- * 设置文本的垂直对齐方式,默认:alphabetic文本基线是普通的字母基线。
- * top 文本基线是 em 方框的顶端。
- * hanging 文本基线是悬挂基线。
- * middle 文本基线是 em 方框的正中。
- * ideographic 文本基线是表意基线。
- * bottom 文本基线是 em 方框的底端。
- */
- textBaseline:{
- type:String,
- default:function(){
- return 'alphabetic';
- }
- },
- /**
- * 文字大小
- */
- fontSize:{
- type:[Number, String],
- default:30
- },
- /**
- * 文字颜色
- */
- fontColor:{
- type:String,
- default:function(){
- return 'red'
- }
- },
- /**
- * 阴影颜色
- */
- shadowColor:{
- type:String,
- default:function(){
- return 'rgba(0, 0, 0, 1.0)';
- }
- },
- /**
- * 阴影边框大小
- */
- shadowWidth:{
- type:[Number, String],
- default:2
- },
- /**
- * 图片的质量,取值范围为 (0, 1],不在范围内时当作1处理
- */
- quality:{
- type:[Number, String],
- default:1
- },
- /**
- * 目标文件的类型,只支持 'jpg' 或 'png'。默认为 'png'
- */
- fileType:{
- type:String,
- default:function(){
- return 'png'
- }
- }
- },
- data() {
- return {
- fileList: [],
- files: [],
- filesList:[],
- canvasWidth:0,
- canvasHeight:0
- };
- },
- watch: {
- fileList: {
- handler(newVal, oldVal) {
- this.filesList=newVal;
- },
- immediate: true
- },
-
- },
- methods: {
-
- // 选择图片
- chooseImage() {
- if(this.isEmpty(this.address)){
- uni.showToast({
- icon:'none',
- title:'请打开定位或者重新获取'
- });
- return;
- }
- uni.chooseImage({
- count: this.limit, // 限制的图片数量
- sizeType: ['compressed'], // original 原图,compressed 压缩图,默认二者都有
- sourceType: [ 'camera'],// album 从相册选图,camera 使用相机,默认二者都有
- success: (res) => {
- var imgPathList = res.tempFilePaths;
- if(imgPathList.length > 0){
- this.addImages(imgPathList);
- }
- },
- fail: (err) => {
- console.log('chooseImage fail', err)
- if("chooseImage:fail cancel" == err.errMsg){
- uni.showToast({
- icon:'none',
- title:'取消了选择'
- });
- }else{
-
- }
- }
- });
- },
- // 添加图片
- addImages(filePaths){
-
- if(filePaths.length > 0){
- var fillTexts = ["地址:"+this.address];
- fillTexts.push("时间:" + this.getNowTime());
- // 添加水印
- this.addWaterMark({
- filePaths,
- fillTexts
- });
- }
- },
- /**
- * 水印添加回调,在H5平台下,filePath 为 base64
- */
- waterMark(filePath){
- this.imageList.push(filePath);
- },
- /**
- * 获取当前时间
- */
- getNowTime(){
- var date = new Date(),
- year = date.getFullYear(),
- month = date.getMonth() + 1,
- day = date.getDate(),
- hour = date.getHours() < 10 ? "0" + date.getHours() : date.getHours(),
- minute = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes(),
- second = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
- month >= 1 && month <= 9 ? (month = "0" + month) : "";
- day >= 0 && day <= 9 ? (day = "0" + day) : "";
- return (year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second);
- },
-
- /**
- * 删除文件
- * @param {Object} index
- */
- delFile(index) {
- this.$emit('delete', {
- tempFile: this.filesList[index],
- tempFilePath: this.filesList[index].url
- })
- this.filesList.splice(index, 1)
-
-
- },
- /**
- * 增加水印
- * @param {Object} {filePaths:['图片地址1', '图片地址2'], fillTexts:['水印1', '水印2']}
- */
- async addWaterMark({ filePaths = [], fillTexts = [] }) {
-
- try{
- for (const filePath of filePaths) {
- await this.drawImage(filePath, fillTexts.reverse());
- }
- }catch(e){
- // TODO handle the exception
- }finally{
- // uni.hideLoading();
- }
- },
- /**
- * 绘制单个图片
- */
- async drawImage(filePath, fillTexts){
- uni.showLoading({title:'图片处理中···'});
- const ctx = uni.createCanvasContext('watermarkCanvas', this);
- return new Promise(resolve => {
- uni.getImageInfo({
- src: filePath,
- success: (image) => {
- this.canvasWidth = image.width;
- this.canvasHeight = image.height;
- ctx.clearRect(0, 0, image.width, image.height);
- setTimeout(()=>{
- ctx.drawImage(image.path, 0, 0, image.width, image.height);
- ctx.setFontSize(this.fontSize);
- ctx.setFillStyle(this.fontColor);
- // 设置阴影
- let shadowWidth = Number(this.shadowWidth + "");
- if(shadowWidth > 0){
- ctx.shadowColor = this.shadowColor;
- ctx.shadowOffsetX = shadowWidth;
- ctx.shadowOffsetY = shadowWidth;
- }
- // 设置水平对齐方式
- ctx.textAlign = this.textAlign;
- // 设置垂直对齐方式
- ctx.textBaseline = this.textBaseline;
- const maxText = fillTexts.reduce((text, val) => {
- return text.length >= val.length ? text : val;
- });
- fillTexts.forEach((mark, index) => {
- if(this.markAlign == "bottomRight"){
- ctx.fillText(mark, image.width - (ctx.measureText(maxText).width+60), image.height - (index*60+60));
- }else if(this.markAlign == "topLeft"){
- ctx.fillText(mark, 20, (index*60+60));
- }else if(this.markAlign == "topRight"){
- ctx.fillText(mark, image.width - (ctx.measureText(maxText).width+60), (index*60+60));
- }else{
- ctx.fillText(mark, 20, image.height - (index*60+60));
- }
- });
- ctx.draw(false, (() => {
- setTimeout(()=>{
- uni.canvasToTempFilePath({
- canvasId: 'watermarkCanvas',
- fileType:this.fileType,
- quality:Number(this.quality + "" || "1"),
- success: (res) => {
- console.log("添加水印后的路径",res.tempFilePath )
- this.saveUploadImage(res.tempFilePath )
- },
- fail:(err) => {
- uni.hideLoading();
- console.log(err)
- },
- complete: () => {
- resolve();
- }
- }, this);
- }, 300);
- })());
- }, 200);
- },
- fail: (e) => {
- resolve();
- }
- });
- });
- },
- saveUploadImage(tempFilePath){
- uni.showLoading({title:'图片上传中···'});
- // #ifdef APP-PLUS
- var p = plus.io.convertLocalFileSystemURL(tempFilePath);
- this.url = 'file:/' + p
- console.log("添加水印后的完整路径",this.url )
- // #endif
- uni.uploadFile({
- url: fileServerIp + 'common/upload',
- name: "file",
- // #ifdef H5
- filePath: tempFilePath,
- // #endif
- // #ifdef APP-PLUS
- filePath: this.url,
- // #endif
- header: {
- Authorization: "Bearer " + Session.getValue('token')
- },
- success: uploadFileRes => {
- uni.hideLoading();
- const {
- data
- } = JSON.parse(uploadFileRes.data)
- this.filesList.push({
- url: data.url,
- name: data.fileName,
- extname: 'png'
- })
- this.$emit('waterMark',{
- url: data.url,
- name: data.fileName,
- extname: 'png'
- });
- },
- fail: error => {
- uni.hideLoading();
- uni.showToast({
- title: '上传失败!',
- icon: 'error',
- duration: 2000
- });
- }
- })
- }
- }
- }
- </script>
-
- <style scoped>
- .watermark-content{width: 0;height: 0;overflow: hidden;}
- .uni-file-picker__container {
- /* #ifndef APP-NVUE */
- display: flex;
- box-sizing: border-box;
- /* #endif */
- flex-wrap: wrap;
- margin: -5px;
- }
- .rotate {
- position: absolute;
- transform: rotate(90deg);
- }
-
- .icon-add {
- width: 50px;
- height: 5px;
- background-color: #f1f1f1;
- border-radius: 2px;
- }
- </style>

upload-image.vue
- <template>
- <view class="uni-file-picker__container">
- <view class="file-picker__box" v-for="(item,index) in filesList" :key="index" :style="boxStyle">
- <view class="file-picker__box-content" :style="borderStyle">
- <image class="file-image" :src="item.url" mode="aspectFill" @click.stop="prviewImage(item,index)"></image>
- <view v-if="delIcon && !readonly" class="icon-del-box" @click.stop="delFile(index)">
- <view class="icon-del"></view>
- <view class="icon-del rotate"></view>
- </view>
- <view v-if="(item.progress && item.progress !== 100) ||item.progress===0 " class="file-picker__progress">
- <progress class="file-picker__progress-item" :percent="item.progress === -1?0:item.progress" stroke-width="4"
- :backgroundColor="item.errMsg?'#ff5a5f':'#EBEBEB'" />
- </view>
- <view v-if="item.errMsg" class="file-picker__mask" @click.stop="uploadFiles(item,index)">
- 点击重试
- </view>
- </view>
- </view>
- <view v-if="filesList.length < limit && !readonly" class="file-picker__box" :style="boxStyle">
- <view class="file-picker__box-content is-add" :style="borderStyle" @click="choose">
- <slot>
- <view class="icon-add"></view>
- <view class="icon-add rotate"></view>
- </slot>
- </view>
- </view>
- </view>
- </template>
-
- <script>
- export default {
- name: "uploadImage",
- emits:['uploadFiles','choose','delFile'],
- props: {
- filesList: {
- type: Array,
- default () {
- return []
- }
- },
- disabled:{
- type: Boolean,
- default: false
- },
- disablePreview: {
- type: Boolean,
- default: false
- },
- limit: {
- type: [Number, String],
- default: 9
- },
- imageStyles: {
- type: Object,
- default () {
- return {
- width: 'auto',
- height: 'auto',
- border: {}
- }
- }
- },
- delIcon: {
- type: Boolean,
- default: true
- },
- readonly:{
- type:Boolean,
- default:false
- }
- },
- computed: {
- styles() {
- let styles = {
- width: 'auto',
- height: 'auto',
- border: {}
- }
- return Object.assign(styles, this.imageStyles)
- },
- boxStyle() {
- const {
- width = 'auto',
- height = 'auto'
- } = this.styles
- let obj = {}
- if (height === 'auto') {
- if (width !== 'auto') {
- obj.height = this.value2px(width)
- obj['padding-top'] = 0
- } else {
- obj.height = 0
- }
- } else {
- obj.height = this.value2px(height)
- obj['padding-top'] = 0
- }
-
- if (width === 'auto') {
- if (height !== 'auto') {
- obj.width = this.value2px(height)
- } else {
- obj.width = '33.3%'
- }
- } else {
- obj.width = this.value2px(width)
- }
-
- let classles = ''
- for(let i in obj){
- classles+= `${i}:${obj[i]};`
- }
- return classles
- },
- borderStyle() {
- let {
- border
- } = this.styles
- let obj = {}
- const widthDefaultValue = 1
- const radiusDefaultValue = 3
- if (typeof border === 'boolean') {
- obj.border = border ? '1px #eee solid' : 'none'
- } else {
- let width = (border && border.width) || widthDefaultValue
- width = this.value2px(width)
- let radius = (border && border.radius) || radiusDefaultValue
- radius = this.value2px(radius)
- obj = {
- 'border-width': width,
- 'border-style': (border && border.style) || 'solid',
- 'border-color': (border && border.color) || '#eee',
- 'border-radius': radius
- }
- }
- let classles = ''
- for(let i in obj){
- classles+= `${i}:${obj[i]};`
- }
- return classles
- }
- },
- methods: {
- uploadFiles(item, index) {
- this.$emit("uploadFiles", item)
- },
- choose() {
- this.$emit("choose")
- },
- delFile(index) {
- this.$emit('delFile', index)
- },
- prviewImage(img, index) {
- let urls = []
- if(Number(this.limit) === 1&&this.disablePreview&&!this.disabled){
- this.$emit("choose")
- }
- if(this.disablePreview) return
- this.filesList.forEach(i => {
- urls.push(i.url)
- })
-
- uni.previewImage({
- urls: urls,
- current: index
- });
- },
- value2px(value) {
- if (typeof value === 'number') {
- value += 'px'
- } else {
- if (value.indexOf('%') === -1) {
- value = value.indexOf('px') !== -1 ? value : value + 'px'
- }
- }
- return value
- }
- }
- }
- </script>
-
- <style lang="scss">
- .uni-file-picker__container {
- /* #ifndef APP-NVUE */
- display: flex;
- box-sizing: border-box;
- /* #endif */
- flex-wrap: wrap;
- margin: -5px;
- }
-
- .file-picker__box {
- position: relative;
- // flex: 0 0 33.3%;
- width: 33.3%;
- height: 0;
- padding-top: 33.33%;
- /* #ifndef APP-NVUE */
- box-sizing: border-box;
- /* #endif */
- }
-
- .file-picker__box-content {
- position: absolute;
- top: 0;
- right: 0;
- bottom: 0;
- left: 0;
- margin: 5px;
- border: 1px #eee solid;
- border-radius: 5px;
- overflow: hidden;
- }
-
- .file-picker__progress {
- position: absolute;
- bottom: 0;
- left: 0;
- right: 0;
- /* border: 1px red solid; */
- z-index: 2;
- }
-
- .file-picker__progress-item {
- width: 100%;
- }
-
- .file-picker__mask {
- /* #ifndef APP-NVUE */
- display: flex;
- /* #endif */
- justify-content: center;
- align-items: center;
- position: absolute;
- right: 0;
- top: 0;
- bottom: 0;
- left: 0;
- color: #fff;
- font-size: 12px;
- background-color: rgba(0, 0, 0, 0.4);
- }
-
- .file-image {
- width: 100%;
- height: 100%;
- }
-
- .is-add {
- /* #ifndef APP-NVUE */
- display: flex;
- /* #endif */
- align-items: center;
- justify-content: center;
- }
-
- .icon-add {
- width: 50px;
- height: 5px;
- background-color: #f1f1f1;
- border-radius: 2px;
- }
-
- .rotate {
- position: absolute;
- transform: rotate(90deg);
- }
-
- .icon-del-box {
- /* #ifndef APP-NVUE */
- display: flex;
- /* #endif */
- align-items: center;
- justify-content: center;
- position: absolute;
- top: 3px;
- right: 3px;
- height: 26px;
- width: 26px;
- border-radius: 50%;
- background-color: rgba(0, 0, 0, 0.5);
- z-index: 2;
- transform: rotate(-45deg);
- }
-
- .icon-del {
- width: 15px;
- height: 2px;
- background-color: #fff;
- border-radius: 2px;
- }
- </style>

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