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获取对象类型参数说明有误 #79

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cajsaiko opened this issue Dec 22, 2017 · 0 comments
Open

获取对象类型参数说明有误 #79

cajsaiko opened this issue Dec 22, 2017 · 0 comments

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@cajsaiko
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获取对象类型这一章里有说到“其中 object_getClass 是一个定义在 ObjectiveC 的 runtime 中的方法，它可以接受任意的 AnyObject! 并返回它的类型 AnyClass! (注意这里的叹号，它表明我们甚至可以输入 nil，并期待其返回一个 nil)”

这里查了下object_getClass方法说明，接受的应该是一个Optional类型才对，文中也提到可以接受nil，叹号应该改成问号吧
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@cajsaiko