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不错，我用的qt4.8.5，之前看到网上流传的，大多数是“利用 Qt 4.1.0 读取注册表获得串口信息”之类的，里面有个类型转换函数usc2，这个在qt4.8.5下根本没有，后来参考另一篇博客和你这篇博客，不用usc2()就可以了