Interactable button UNITY

Question

I'm trying to make a simple condition:

If the value I have, is less than the price it costs the item, the button is disabled.

If the value I have, is greater than or equal to the price it costs the item the button is enabled and I can buy it.

But when I test, I have some problems.

First, if I have less than the item cost the button is enabled, and only when I click on it it is when it disables.

Second, if I have less than the item cost and I click on it it disables, but if I get enough to purchase the item, the button is not enabled again.

How do I to be checked these variables all the time? If I have enough the button is enabled if you do not have it disables.

Bellow my scrip:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class BuySkin : MonoBehaviour {

    public int price;
    public Button buyBee1;

    void OnEnable ()
    {
        //Register Button Events
        buyBee1.onClick.AddListener (() => buySkin (buyBee1));
    
    }


    public void buySkin(Button button)
    { 
        if (BeeCoinScore.coin >= price) {
            BeeCoinScore.coin -= price;
            buyBee1.interactable = false;

        }

        if (BeeCoinScore.coin < price) {
            buyBee1.interactable = false;
        }
    }

    void OnDisable ()
    {
        //Un-Register Button Events
        buyBee1.onClick.RemoveAllListeners ();

    }
}

Iury Dias · Accepted Answer · 2016-05-10 03:56:38Z

1

Try this out with some prefabs!

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;

public class GameController : MonoBehaviour
{

    public int coins;
    private int spherePrice = 100, cubePrice = 50;

    public GameObject player;
    public GameObject[] availablePrefabs;
    public List<GameObject> mySkins;

    public Button btnSphere, btnCube;
    public Text txtSphere, txtCube;

    void Start ()
    {
        string serializedMySkins = PlayerPrefs.GetString ("skins", "");
        string serializedPlayer = PlayerPrefs.GetString ("player", "");

        // skins desserialization
        if (serializedMySkins == "")
            mySkins = new List<GameObject> ();
        else {
            var a = serializedMySkins.Split (',');
            for (int i = 0; i < a.Length; i++) {
                if (a [i] == "Sphere") {
                    mySkins.Add (availablePrefabs [0]);
                } 

                if (a [i] == "Cube") {
                    mySkins.Add (availablePrefabs [1]);
                } 
            }
        }

        // player desserialization
        if (serializedPlayer != "") {
            if (serializedPlayer == "Sphere") {
                player = availablePrefabs [0];
            } 

            if (serializedPlayer == "Cube") {
                player = availablePrefabs [1];
            } 
        } else {
            player = mySkins [0];
        }

        coins = PlayerPrefs.GetInt ("coins", 0);
        coins = 1000;
    }

    void Update ()
    {
        if (mySkins.Contains (availablePrefabs [0])) { 
            txtSphere.text = "Usar esfera";
        } else {
            btnSphere.interactable = coins >= spherePrice;
        }

        if (mySkins.Contains (availablePrefabs [1])) {
            txtCube.text = "Usar cubo";
        } else {
            btnCube.interactable = coins >= cubePrice;
        }
    }

    public void play ()
    {
        player = (GameObject)Instantiate (player, new Vector2 (0, 0), Quaternion.identity);
    }

    public void verifySkin (GameObject skinPrefab)
    {
        if (mySkins.Contains (skinPrefab)) {
            useSkin (skinPrefab);
        } else if (coins >= priceOf (skinPrefab)) {
            buySkin (skinPrefab, priceOf (skinPrefab));
        }
    }

    public void buySkin (GameObject skinPrefab, int price)
    {
        mySkins.Add (skinPrefab);
        coins -= price;

        string skinsHash = "";
        for (int i = 0; i < mySkins.Count; i++) {
            skinsHash += mySkins [i].name + ",";
        }

        Debug.Log (skinsHash);

        PlayerPrefs.SetInt ("coins", coins);
        PlayerPrefs.SetString ("skins", skinsHash);

        PlayerPrefs.Save ();
    }

    public void useSkin (GameObject skinPrefab)
    {
        player = skinPrefab;
        PlayerPrefs.SetString ("player", player.name);
        PlayerPrefs.Save ();
    }

    private int priceOf (GameObject skinPrefab)
    {
        if (skinPrefab == availablePrefabs [0])
            return spherePrice;
        else if (skinPrefab == availablePrefabs [1])
            return cubePrice;
        else
            return 0;
    }
}

edited May 10, 2016 at 3:56

answered May 10, 2016 at 0:07

Iury Dias

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11 Comments

yes Over a year ago

i think the above script is for some sort of buy window, so you probably dont need to update that every frame.

Alan Vieira Rezende Over a year ago

It's not working, when I do not possess enough resource to purchase the item, the button is enabled. If you do not have resources it should be disabled until I have enough resource to purchase the item.

yes Over a year ago

@AlanVieiraRezende have you tried just putting it in OnEnable?

Alan Vieira Rezende Over a year ago

@yes I am trying since you answered my question, but without success yet.

Iury Dias Over a year ago

On the code above, you see that in both conditions you're setting buyBee1.interactable as false right? Shouldn't one of them be true?

|

paul p · Accepted Answer · 2016-05-10 03:03:12Z

OnEnable()is called when the object becomes enabled and active. you need Update() as it is getting called every frame it will check whether your value is less than or greater than price of item.You may also try like this.

// I think that you are making an buymenu, so you can disable and enable your menu with ui button and check money you have


     using System.Collections;
        using UnityEngine.UI;

        public class BuySkin : MonoBehaviour 
    {

            public int price;
            public static int money;// money you have
            public Button thisbuyBee1;
    public void buychkr()
    {
    if(price>= money)
    {
    thisbuyBee1.interactable = false;
    }
    else
    {
    thisbuyBee1.interactable = true;
    }
    }
    void Update()
    {
    buychkr();
    }
}

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