• 一个base64文件
"data:image/png;base64,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…"
  • 先转为文件
 dataURLtoFile (dataurl, filename) { // 将base64转换为文件var arr = dataurl.split(','); var mime = arr[0].match(/:(.*?);/)[1]var bstr = atob(arr[1]); var n = bstr.length; var u8arr = new Uint8Array(n)while (n--) {u8arr[n] = bstr.charCodeAt(n)}return new File([u8arr], filename, { type: mime })},picturesSuccess (imageData) {+ 在转换为表单形式提交后台var formData = new FormData()formData.append('file', this.dataURLtoFile(imageData, 'file.jpeg'))fileUpload(formData).then(res => {this.needBackImg = res.data.filePath // 背景图this.previewVisible = false}).catch(e => {})},

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