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哪些对象能够响应事件，这些对象的共同点是什么？ #153

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哪些对象能够响应事件，这些对象的共同点是什么？#153
@tbfungeek

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@tbfungeek
tbfungeek
opened on Feb 19, 2020
  • UIView
  • UIApplication
  • UIViewController

这些对象都是继承自UIResponder类

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