建议看下文档：https://developers.weixin.qq.com/miniprogram/dev/quickstart/basic/getstart.html#%E4%BD%A0%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%B0%8F%E7%A8%8B%E5%BA%8F
