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小程序页面上的二维码用微信扫码后页面怎么自动跳转？

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小程序页面上的二维码用微信扫码后页面怎么自动跳转？

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页面/pages/login/index有这样一个二维码 用微信扫码授权后如何从pages/login/index跳转到pages/index/index页面 不是扫码的手机跳转到小程序 而是小程序页面的跳转


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二维码应该为一个链接（携带参数），手机扫码后会跳转这个链接来告诉后台该码已扫（已请求）。
展示二维码的小程序使用websocket，或者隔1秒请求后台查询小程序码是否已扫描


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