UISlider's Value Changed target is NOT called

Question

I have a UISlider in the XIB file with an IBAction outlet hooked up to its corresponding view controller. Everything looks fine (see image below). However, when I actually move the slider in the simulator - the Value Changed (sliderValueChanged in the image) target is NOT being called. I have verified that viewDidLoad is being called and that the view controller is hooked up to the XIB.

Help!

uff. i set up a quick demo project with a viewcontroller from xib and everything works as expected. would you like to share your project? — André Slotta, Aug 17 '16 at 20:53
You know, I started with a scene that was in a storyboard - then I cut and pasted the view inside that scene into an XIB file. I think it's screwing up with XCode. — etayluz, Aug 17 '16 at 21:09
hmm... maybe a private repository on github? or you can archive and send it via mail. andre.slotta@gmail.com. — André Slotta, Aug 17 '16 at 21:13
i do not see the code from your screenshot in the viewcontroller file you sent me?! :) — André Slotta, Aug 17 '16 at 21:22
I removed it - go ahead and try make the IBAction yourself - and then put a breakpoint while running it in the simulator - you will see it never gets there — etayluz, Aug 17 '16 at 21:30

score 0 · Answer 1 · edited May 23 '17 at 12:22

I found the issue. The view controller wasn't retained in my project - so there was nothing for the slider to call on. Really silly. No problem with the XIB file at all. I always thought that the view retains it's view controller - and that the view is retained so long as it's in the view hierarchy. Am I wrong? Special thanks to @AndreSlotta for helping me.

EDIT: Apparently a view does NOT retain its view controller: Does a UIView retain its view controller

UISlider's Value Changed target is NOT called

1 Answers1