FileSystemManager.copyFile

解释：用于实现文件拷贝。 方法参数：Object object **：

代码示例

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