这种方法实现简单，但需要在每个 iOS 调用点手动处理类型转换。
And it's not just a robot vacuum, it's a mop too. It uses BLAST technology alongside its 16,600Pa suction to pick up dust and pet hair deep from carpets, meanwhile the Triple Lift System raises the mop, side brush, and main brush independently to keep carpets dry and make transitions between the vacuum and mop seamless.
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h->type = type;
Discord was quick to distance itself from Persona, saying the test it had done with that company was limited and now over.