FileSystemManager.writeFile

解释：写文件。 方法参数：Object object **： encoding 的合法值**

代码示例

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  1. Page({    onLoad() {        const fs = swan.getFileSystemManager();        this.fs = fs;    },    writeFile() {        this.fs.writeFile({            filePath: `${swan.env.USER_DATA_PATH}/demo.txt`,            data: 'writeFile',            success: res => {                console.log('writeFile success', res);            },            fail: err => {                console.log('writeFile fail', err)            }        });    }});