isKindOfClass和isMemberOfClass的區別

<span style="font-size:18px;">isKindOfClass: Returns a Boolean value that indicates whether the receiver is an instance of given class or an instance of any class that inherits from that class.

isMemberOfClass: Returns a Boolean value that indicates whether the receiver is an instance of a given class.

isKindOfClass和isMemberOfClass之間的區別是：
我們可以使用isKindOfClass來確定一個對象是否是一個類的實例，或者是該類祖先類的實例。
isMemberOfClass只能用來判斷前者，不能用來判斷後者。</span>