【iOS】Touch Up Inside 和 Touch Up Outside 的区别

Touch Up Inside：按下按钮，并且在按钮内部（inside）松手

Touch Up Outside：按下按钮，并且在按钮外部（outside）松手

[依据] 来自Apple官方文档 UIControlEvents：

UIControlEventTouchUpInside：A touch-up event in the control where the finger is inside the bounds of the control.

UIControlEventTouchUpOutside：A touch-up event in the control where the finger is outside the bounds of the control.