uni-app 将base64图片转换成临时地址
function getTempFilePath(base64Data) {return new Promise((resolve, reject) => {const fs = uni.getFileSystemManager()base64Data = base64Data.split(',')[1]const fileName = 'temp_image_' + Date.now() + '.png' // 自定义文件名，可根据需要修改const filePath = uni.env.USER_DATA_PATH + '/' + fileNameconst buffer = uni.base64ToArrayBuffer(base64Data)fs.writeFile({filePath,data: buffer,encoding: 'binary',success:res => resolve(filePath),fail:err => reject(err)})});}