koobas.hobune.stream
Array of buttons not displaying in game
I am trying to take an array of images and display them in buttons. Depending on the size of the array, it is suppose to create a button per image. The problem is that when i try to run the code I get this error:
NullReferenceException: Object reference not set to an instance of an object Boo.Lang.Runtime.RuntimeServices.InvokeBinaryOperator (System.String operatorName, System.Object lhs, System.Object rhs) NewBehaviourScript.DrawButtons () (at Assets/NewBehaviourScript.js:13) NewBehaviourScript.Update () (at Assets/NewBehaviourScript.js:8)
My question is what am I doing wrong? this is the code:
var numberOfButtonsWide = 6;
var topLeft = Vector2(100,100);
var width = 800;
var buttonHeight = 60;
var myList : Texture[];
function Start(){
DrawButtons();
}
function DrawButtons()
{
var buttonWidth = width/numberOfButtonsWide;
for(var x =0; x < myList.Count; x++)
{
if(GUI.Button(
Rect(topLeft.x + (x % numberOfButtonsWide) * buttonWidth,
topLeft.y + Mathf.FloorToInt(x / numberOfButtonsWide) * buttonHeight,buttonWidth,buttonHeight),
GUIContent (myList[x])))
{
}
}
}
Are you version constrained? The new UI tools in 4.6 are much more effective and easier to use then the legacy OnGUI methods.
GUI method use only into OnGUI() function. And use Texture2D instead of Texture:
function Start(){
}
function OnGUI(){
DrawButtons();
}
I hope that it will help you.
still does not work I get the same error even if I call it from the OnGUI(){} is looks like the error is co$$anonymous$$g from the for loop, but I dont know why.
@darkcookie Of course, you get error. Your variable "myList" declare as Array, but in loop "for" you use it as List. Try:
function DrawButtons() {
var buttonWidth = width/numberOfButtonsWide;
//Not use Count, use Length
for(var x:int = 0; x < myList.Length; x++) {
if(GUI.Button(
Rect(topLeft.x + (x % numberOfButtonsWide) * buttonWidth,
topLeft.y + $$anonymous$$athf.FloorToInt(x / numberOfButtonsWide) * buttonHeight,buttonWidth,buttonHeight),
GUIContent(myList[x])))
{
}
}
}
