ios - Where to look in Xcode for debug information -

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i’m new ios, xcode development… , i’m having trouble trying figure why app failing @ specific point.

i have starting viewcontroller called mainmenuviewcontroller has label application title , 2 buttons. each button acts segue action show 2 more viewcontrollers.

the app builds when mainmenuviewcontroller appears if click on first button takes me next viewcontroller , actions on , subsequent viewcontrollers lead on these views segue actions take me mainmenuviewcontroller of these views work correctly.

from mainmenuviewcontroller if click second button segue action fails , xcode points class appdelegate: uiresponder, uiapplicationdelegate { line in file appdelegate.swift.

where should looking find out why app failed?

ok... figured out... 2 views had commonality when completed first view copied common controls on other view. unknown me not transferred control had sentevent referenced first view controller. these not replaced new references constructed added to. deleting original references fixed issue.


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