Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
怎么读取缓冲区里的东西呢 或者就是buf咋定义呢 就是怎么将二维码扫出来的东西显示到屏幕上呢
我不太懂你什么意思,什么屏幕