UITextField控件事件：UIControlEventEditingChanged与UIControlEventAllEditingEvents

Question

这两个UIControlEvents之间有什么区别？

文档说：

UIControlEventAllEditingEvents   // All editing touches for UITextField objects.
UIControlEventEditingChanged     // A touch making an editing change in a UITextField object.

特别是UIControlEventAllEditingEvents对我来说并不清楚，因为我没有得到'所有编辑功能'的含义。

Answer 1

据推测，只要其中一个发生，就会发生事件UIControlEventAllEditingEvents：

UIControlEventEditingDidBegin 
UIControlEventEditingChanged
UIControlEventEditingDidEnd 
UIControlEventEditingDidEndOnExit