How can I add function to onClick event by code?

Question

I've got problem with adding function to a button. I'm reloading scene many times on runtime and button loses its function. I can't add it from Inspector so i need to do it by code. I've tried this

 void OnLevelWasLoaded(int level) {
         if (level == 0) {
             GameObject button = GameObject.Find("Sound");
             Button b = button.GetComponent<Button>();
 //            b.onClick.AddListener(() => AudioSwitch());
             b.onClick.AddListener(delegate { AudioSwitch(); });
         }
     }

but it does not work for me. How can I do that?

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Answer 1

Best Answer

Answer by jmorhart · Nov 04, 2015 at 10:52 PM

Try this:

 b.onClick.AddListener(AudioSwitch);

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Answer 2

Answer by elenzil · Nov 04, 2015 at 11:33 PM

your problem is including the paren's after AudioSwitch. AudioSwitch means "use the function AudioSwitch itself here". AudioSwitch() means "call AudioSwitch, and use whatever it returns here".

so assuming AudioSwitch() was a void function, your code is equivalent to

 b.onClick.AddListener(() => null);

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grzesiu10 · Nov 05, 2015 at 09:24 PM 0

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When I removed parentheses from AudioSwitch an error occured: Assets/Scripts/Audio$$anonymous$$onitor.cs(58,41): error CS0201: Only assignment, call, increment, decrement, and new object expressions can be used as a statement Thank you anyway! BTW, jmorhart answer works great :)

How can I add function to onClick event by code?

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