新增base64图片直接导出

src/main/file.js

@@ -452,6 +452,27 @@ export default async function ({ app, shell, BrowserWindow, ipcMain }) {
     })
   })
 
+  ipcMain.on('export-img64-file', function (event, {base64, name}) {
+    name = name || '思维导图'
+    const parts = base64.split(';base64,');
+    const contentType = parts[0].split(':')[1];
+    const extension = contentType.split('/')[1];
+    const data = Buffer.from(parts[1], 'base64');
+
+    dialog.showSaveDialog({
+      title: '保存图片',
+      defaultPath: path.join(app.getPath('downloads'), `${name}.${extension}`),
+      filters: [
+        { name: 'Image Files', extensions: [extension] }
+      ]
+    }).then(result => {
+      if (!result.canceled) {
+        fs.writeFileSync(result.filePath, data);
+        event.reply('export-img64-file-reply')
+      }
+    });
+  })
+
   /*导出文件*/
   function exportFile(list, callback) {
     let win = BrowserWindow.getFocusedWindow()

src/renderer/src/utils/talkFile/index.js

@@ -87,6 +87,15 @@ export const exportFile = async (list) => {
   })
 }
 
+export const exportImg64File = async (base64, name) => {
+  return new Promise((resolve, reject) => {
+    ipcRenderer.send('export-img64-file', {base64,name})
+    ipcRenderer.once('export-img64-file-reply', (e) => {
+      resolve()
+    })
+  })
+}
+
 export const creatPPT = (name, uploadData) => {
   JSON.parse(JSON.stringify(uploadData))
   return new Promise((resolve, reject) => {