Incorrect text on screen - unity3d

Question

Hi I'm new to this unity and I'm making a 2d game the problem.I'm facing is displaying the right text in the screen , e.g I have a score count for keeping track of score and then I'm displaying this text through count.text , HOWEVER the problem is that when the game starts the text on screen displays "0", score is 0 as well, then I shoot an apple and the score becomes 1 as well as the count.text also becomes 1 however the text is still 0 on the screen, when I shoot another arrow the score and count.text shows value of 2 however on the screen it shows 1 and so on. I followed unity tutorial of roll the ball. here is my code
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class arrowcounttutorial : MonoBehaviour {
public GameObject Arrow;
public GameObject apple;
public int score = 0;
public Text count;
// Use this for initialization
void Start () {
this.gameObject.GetComponent<Rigidbody2D> ().AddForce (transform.right*1500.0f);
//score = 0;
//showcounttext ();
count.text = score.ToString ();
}
// Update is called once per frame
void Update () {
Vector3 diff = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
diff.Normalize();
float rot_z = Mathf.Atan2(diff.y, diff.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.Euler(0f, 0f, rot_z - 0);
if (Input.GetMouseButtonUp (0)) {
GameObject bullet_new;
bullet_new = Instantiate (Arrow,new Vector2 (-0.23f, -3.78f), Quaternion.identity) as GameObject;
RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition),Vector2.zero);
if (hit.collider!= null ) {
LeanTween.move(bullet_new, hit.collider.transform.localPosition, 1);
if(hit.collider.tag == "fruit")
{
score++;
//showcounttext();
count.text = score.ToString ();
print(count.text);
Destroy(hit.collider.gameObject,1);
Destroy(bullet_new,1);
}
}
}
}
/*
void showcounttext(){
count.text = score.ToString ();
}
*/
}
Also if I initialize the score in void start the text remains 0 through out the level even if the score and count.text are 1,2,3,4,5 so on. What can I do?
UPDATE
I don't know how it worked but I called an invoke function Invoke ("showcounttext",1); and it worked. I won't delete the question in case someone else have this same problem :)

Answer 1

I see your answer, good that it is fixed but it is not the best solution.
Prior to Unity3D version 5.3.1p3 this engine had problems with updating canvases, and sometimes the UI content was disapearing. You didnt tell version you use, but I am almost sure in this case it would help calling
Canvas.ForceUpdateCanvases ();
In your code it should look like that:
if(hit.collider.tag == "fruit")
{
score++;
//showcounttext();
count.text = score.ToString ();
print(count.text);
Destroy(hit.collider.gameObject,1);
Destroy(bullet_new,1);
Canvas.ForceUpdateCanvases ();
}
Try this, or upgrade Unity3D.