Unity 3D Game Development by Example

Time for action - create a button UI control

We're going to add a button to the title screen through code, using Unity's built-in OnGUI function.

1. Double-click the TitleGUI script, or switch over to the script editor if it's already open.
2. We won't need the Update function any longer. Instead, we'll be using the built-in OnGUI function. Change the word Update to OnGUI:

   var customSkin:GUISkin;
   function OnGUI() {
   }
   

3. Add a button-creating chunk of code inside the OnGUI function:

   var customSkin:GUISkin;
   function OnGUI() {
   if(GUI.Button(Rect(0,0,100,50),"Play Game")) {
   print("You clicked me!");
   }
   }
   

4. Save the script and press the Unity Play button to test your game.

A button labeled Play Game appears at the top-left of the screen. When you click on it, ...