11、electron showSaveDialog保存文件

一、知识点

`dialog.showSaveDialog([browserWindow, ]options[, callback])`

browserWindow BrowserWindow (可选)
options Object
- title String
- defaultPath String
- filters Array
callback Function (可选)

成功使用这个方法的话，就返回一个可供用户选择的文件路径数组，失败返回 undefined.

filters 指定展示一个文件类型数组, 例子 dialog.showOpenDialog .

如果 callback 被调用, 将异步调用 API ，并且结果将用过 callback(filenames) 展示

二、示例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="button" id="btn" value="保存文件" />
    
    <script>
        const remote = require('@electron/remote');
        const dialog = remote.dialog;
        const fs =require('fs');

        let btn = document.getElementById("btn");
        btn.onclick = (e)=>{
            dialog.showSaveDialog({
                title:'保存文件',
                defaultPath:'1.txt',
                filters:[{name:'txt',extensions:['txt']}]
            }).then(result=>{
                console.log(result);
                fs.writeFileSync(result.filePath,"123456");
            }).catch(err=>{

            });
        }
    </script>
</body>
</html>