Wait function on Unity - unity3d

Question

I want to wait until "next" button is pressed then continue
child.addChild(tmp);
childrenAdded.Push(tmp);
neighbor.GetComponent.<Renderer>().material.mainTexture = null;
-WAIT UNTIL CLICK ON NEXT BUTTON THEN CONTINUE-
toExpand.Push(tmp);
any idea? I tried:
while(true) {
if(GUI.Button(Rect(500,680 ,100,30),"Next"))
break
}
But it doesn't work; it freezes.

Answer 1

Instead of waiting, you can just have your code called when the button is clicked, like this:
void OnGUI() {
if(GUI.Button(Rect(500,680 ,100,30),"Next"))
toExpand.Push(tmp);
}
}
If possible, consider using Unity 4.6 or later so you can use the new UI which is much easier work with.

Answer 2

You can use Toggle button instead of button so you controll a boolean with toogle and loops what you need in your Update or LateUpdate function like this:
private Rect myRect = new Rect(500,680 ,100,30);
private bool myToggle = false;
void OnGui() {
myToggle = GUI.Toogle(myRect, myToggle, "Next");
}
void Update() {
if(myToggle){
// what I need to create while true;
}
}
Note that is not a good practice to create a new Rect every OnGUI cycle because it runs more than once per frame and it will create a performance issue.
Reading your code again may I could've misinterpreted your needing so if you could clarify what you really what your code to do would be easier to help.
Also, if you just need a "wizard" like sequence of actions I suggest you to take a look on delegates and use something like this:
delegate void MyDelegate();
private MyDelegate myDelegate;
private Rect myRect = new Rect(500,680 ,100,30);
void Start () {
myDelegate = FirstFunction;
}
void FirstFunction() {
// will execute until next button is clicked
}
void SecondFunction() {
// will execute after next button is clicked
}
void OnGui() {
if(GUI.Button(myRect, "Next")) {
myDelegate = SecondFunction;
}
}