我看一个名为“活动抽奖”的小程序做到了，他那个是怎么搞的？
不支持webview长按识别二维码，只能长按识别小程序码
https://developers.weixin.qq.com/community/develop/doc/0002ec46134d2825650affc4f51c00?highLine=%25E5%2585%25AC%25E4%25BC%2597%25E5%258F%25B7%25E6%2596%2587%25E7%25AB%25A0%25E6%2580%258E%25E4%25B9%2588%25E5%259C%25A8%25E5%25B0%258F%25E7%25A8%258B%25E5%25BA%258F%25E5%2586%2585%25E6%2589%2593%25E5%25BC%2580 看看这个对你有灵感的
