uniapp小程序上传图片并压缩

html >> template部分：

<view class=\"mainBox\"><uni-file-picker file-mediatype=\"image\" mode=\"grid\" limit=\"20\" :value=\"uploadImgList\":sourceType=\"[\'camera\', \'album\']\" @select=\"uploadSelect\" ref=\"filePicker\"@delete=\"uploadDelete\"></uni-file-picker></view>

script >> methods部分：

// 上传图片uploadSelect(val) {val.tempFiles.forEach(async item => {try {// 压缩图片const compressedFilePath = await this.compressImage(item.url);// 将压缩后的图片转换为 Base64const base64Url = await this.becomeBase64img(compressedFilePath);this.uploadImgList.push({url: base64Url,uuid: item.uuid});this.imgBase64List.push(base64Url);} catch (error) {console.error(\'图片处理失败:\', error);}})},// 压缩图片compressImage(filePath) {return new Promise((resolve, reject) => {uni.compressImage({src: filePath,quality: 20, // 压缩质量，范围 0 - 100，数值越小，压缩率越高success: (res) => {resolve(res.tempFilePath);},fail: (err) => {reject(err);}});});},// 删除图片uploadDelete(file) {for (let i = this.uploadImgList.length - 1; i >= 0; i--) {if (this.uploadImgList[i].uuid === file.tempFile.uuid) {this.uploadImgList.splice(i, 1);this.imgBase64List.splice(i, 1);}}},// 转义成base64图片becomeBase64img(val) {return new Promise(function(resolve, reject) {pathToBase64(val).then(path => {resolve(path)}).catch(err => {reject(reject)})})},