누르자마자 문자를 바꾸는 단추

using System.Collections.Generic;
public class ToggleText : MonoBehaviour {
    public List<string> StateTexts = new List<string>();
    public int State = 0;
    public UILabel LabelObj =null;

    void Start () {
        SetText(State);
    }

    public void Increment(){
        SetText(State + 1);
    }

    public void SetText(int _idx){
        if( _idx >= StateTexts.Count ){
            _idx = 0;
        }
        if( LabelObj != null ){
            LabelObj.text = StateTexts[_idx];
        }
        State = _idx;
    }
}