ios - UIButton sending wrong touch up inside event -

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i've weird issue have uibutton fires touchupinside event whilst holding button down. happens sporadically, , on couple of devices. not happen on other devices.

i subclassed button, , did override sendaction:to:forevent method see if can figure out something. does, gives selector called, , subsequent event (touchupinside in case) triggered the uicontrol send action event, , has not been help.

i have couple of views beneath , animation well. removed everything, still unable figure out what's causing it.


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