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Question by Busil · Jan 06, 2016 at 08:24 PM · scripting problemuidropdown

UI Dropdown problem.

Hi, I am trying to understand the UI dropdown and On Value Changed. I understand the "on click" in UI Button but here I do not know what should I do. Let's take for example that I have dropdown with 3 options:

English

Spanish

Polish

And I have my

int english,

int spanish

int polish

I want them ( ints) to change when I choose one of languages. english =1,spanish=0,polish=0 etc. How to do it? Thanks.

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Answer by Free_Radical · Apr 29, 2016 at 10:53 PM

Been doing a bit of work with the Dropdown myself lately. Still trying to master it. For your solution:

 public GameObject YourDropdown; 
 
 // Assuming you want to initialize as soon as your object loads into the scene
 void Awake()
 {
    AddListenerToDropdown();
 }
 
 // Add a listener to the Dropdown's OnValueChange event
 void AddListenerToDropdown()
 {
    // Grab a reference to the Dropdown component
    Dropdown Drop = YourDropdown.GetComponent<Dropdown>();
 
    // Add a listener to the event. Yes, it probably looks weird if you're not used to
    // C# events and delegates. 
    Drop.onValueChanged.AddListener(delegate { OnDropdownSelect(Drop); });
 }
 
 // What happens when a dropdown option is selected is handled here
 void OnDropdownSelect(Dropdown Drop)
 {
    // Dropdown options are stored as ints, starting at 0. The value
    // property is the value the dropdown is now set to when you selected
    // a new option. 
    switch (Drop.value)
    {
       case 0: // The first option was selected
          // Do Something
          break;
    
       case 1: // The second option was selected
          // Do Something
          break;
 
       case 2: // The third option was selected
          // Do Something
          break;
 
       default: // Should never happen
          break;
    }
 }


Hope this helps.

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