help with buy button

I have a character select screen and a level select screen with 5 characters and 5 levels I have a coin system set up but I can't figure out how to set up a button to buy the level and subtract the coins and have the button stay gone. or would it be better two have two separate buttons one to buy and one to play how would I set up a condition that you cant press play until the buy button is pressed if that is an easier way to do it?

 

Code (CSharp):

1. bool lvl5 = false; //Level is locked/unlocked
2. int lvl5cost = 500;
3. gameObject lvl5btn; //Put 'gameObject' button for level here
4.  
5. void Buy()
6. {
7.         If (currentCoins => lvl5cost) //Checks if player has enough coins
8.         {
9.                currentCoins -= lvl5cost;
10.                lvl5 = true; //Level is unlocked
11.                lvl5btn = SetActive(false) //Button is inactive/gone/non-existant etc
12.         }
13. }
14.  
15. void Play ()
16. {
17.         If (lvl5 = true) //Checks if level is unlocked
18.         {
19.                //Play level
20.         }
21.         Else
22.         {
23.                //Level not bought message
24.         }
25. }
26.  

The above code might be abit wrong in terms of grammar, but that is the general gist of it.
Also watch the below how to get the buttons working/putting it all togeather.

 

I tried your code but I keep on getting this error CS0246: The type or namespace name 'BuySport' could not be found (are you missing a using directive or an assembly reference?) I tried creating an empty game object and naming it BuySport and I also tried public GameObject BuySport; and I can't seem to figure out how to clear this error

 

I got it working but the button doesn't go away or deactivate after I press it?

 

Well Done.

Have you put the Button GameObject into the 'lvl5btn' variable in the inspector?
Oh also make it public, forgot that.

public gameObject lvl5btn; //Put 'gameObject' button for level here

 

yes I got it working completely but how do I make the button stay gone after I reload the game, when I go back in the button comes back

 

If your talking about rebooting the game (loading the game up when you come back) then obviously you need a way to save your game. That is something I am currently trying to wrap my head around as there seems to be 3 different ways to save a game and you need to specify which data is to be saved and how to load it back in.

Sadly I cannot be of any more assistance here as this is the part I am literally trying to figure out now.
I would suggest looking up 'Unity save binary' or 'Unity save JSON'. One makes a save file that cannot be read by a human as it is encrypted and the other makes a save file that can be read by a human, therefore they can mod the save data (cheat).

 

I

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5. using UnityEngine.SceneManagement;
6.  
7. public class CharacterSelecter : MonoBehaviour
8. {
9.  
10.    
11.     public Text moneyAmountText;
12.     public static int moneyAmount;
13.      //Level is locked/unlocked
14.     int Sportcost = 50;
15.     int Cafecost = 20;
16.     int Cruisercost = 30;
17.     int Ghostcost = 40;
18.     public GameObject BuySport;
19.     public GameObject BuyCafe;
20.     public GameObject BuyCruiser;
21.     public GameObject BuyGhost;
22.     private bool BuySportActive;
23.     private bool BuyCafeActive;
24.     private bool BuyCruiserActive;
25.     private bool BuyGhostActive;
26.  
27.  
28.         private void TryActivateTheBuySport()
29.     {
30.         if (!BuySportActive)
31.         {
32.             BuySport.SetActive(false);
33.         }
34.     }
35.  
36.     private void TryActivateTheBuyCafe()
37.     {
38.         if (!BuyCafeActive)
39.         {
40.             BuyCafe.SetActive(false);
41.         }
42.     }
43.  
44.     private void TryActivateTheBuyCruiser()
45.     {
46.         if (!BuyCruiserActive)
47.         {
48.             BuyCruiser.SetActive(false);
49.         }
50.     }
51.  
52.     private void TryActivateTheBuyGhost()
53.     {
54.         if (!BuyGhostActive)
55.         {
56.             BuyGhost.SetActive(false);
57.         }
58.     }
59.  
60.     private void VerifyIfButtonAIsEnabledInTheSaveData()
61.     {
62.         BuySportActive = (PlayerPrefs.GetInt("BuySport", 1)) == 1 ? true : false;
63.         BuyCafeActive = (PlayerPrefs.GetInt("BuyCafe", 1)) == 1 ? true : false;
64.         BuyCruiserActive = (PlayerPrefs.GetInt("BuyCruiser", 1)) == 1 ? true : false;
65.         BuyGhostActive = (PlayerPrefs.GetInt("BuyGhost", 1)) == 1 ? true : false;
66.     }
67.  
68.     private void SaveTheSportButtonValue()
69.     {
70.         PlayerPrefs.SetInt("BuySport", 0);
71.     }
72.  
73.     private void SaveTheCafeButtonValue()
74.     {
75.         PlayerPrefs.SetInt("BuyCafe", 0);
76.     }
77.  
78.     private void SaveTheCruiserButtonValue()
79.     {
80.         PlayerPrefs.SetInt("BuyCruiser", 0);
81.     }
82.  
83.     private void SaveTheGhostButtonValue()
84.     {
85.         PlayerPrefs.SetInt("BuyGhost", 0);
86.     }
87.  
88.     public void Buy1()
89.     {
90.         if (moneyAmount >= Sportcost)
91.         {
92.             moneyAmount = moneyAmount - Sportcost;
93.             BuySport.SetActive(false);
94.  
95.             if (BuySportActive)
96.             {
97.                 SaveTheSportButtonValue();
98.             }
99.  
100.         }
101.     }
102.  
103.     public void Buy2()
104.     {
105.         if (moneyAmount >= Cafecost)
106.         {
107.             moneyAmount = moneyAmount - Cafecost;
108.             BuyCafe.SetActive(false);
109.  
110.             if (BuyCafeActive)
111.             {
112.                 SaveTheCafeButtonValue();
113.             }
114.         }
115.     }
116.  
117.     public void Buy3()
118.     {
119.         if (moneyAmount >= Cruisercost)
120.         {
121.             moneyAmount = moneyAmount - Cruisercost;
122.             BuyCruiser.SetActive(false);
123.             if (BuyCruiserActive)
124.             {
125.                 SaveTheCruiserButtonValue();
126.             }
127.         }
128.     }
129.  
130.     public void Buy4()
131.     {
132.         if (moneyAmount >= Ghostcost)
133.         {
134.             moneyAmount = moneyAmount - Ghostcost;
135.             BuyGhost.SetActive(false);
136.             if (BuyGhostActive)
137.             {
138.                 SaveTheGhostButtonValue();
139.             }
140.         }
141.     }
142.  
143.     // Start is called before the first frame update
144.     private void Awake()
145.     {
146.         VerifyIfButtonAIsEnabledInTheSaveData();
147.         TryActivateTheBuySport();
148.         TryActivateTheBuyCafe();
149.         TryActivateTheBuyCruiser();
150.         TryActivateTheBuyGhost();
151.     }
152.  
153.  
154.  
155.     void Start()
156.     {
157.         moneyAmount = PlayerPrefs.GetInt("MoneyAmount");
158.        
159.  
160.     }
161.  
162.     // Update is called once per frame
163.     void Update()
164.     {
165.         moneyAmountText.text = "" + moneyAmount.ToString() + "¢";
166.         TryActivateTheBuySport();
167.         TryActivateTheBuyCafe();
168.         TryActivateTheBuyCruiser();
169.         TryActivateTheBuyGhost();
170.     }

finally figured it out its a lot to do just to make a button stay gone but this code is for four different buttons