Array set initial value problems

Question

I have a script that serves to take or give "life" to the character heart-shaped image.

using UnityEngine;
using UnityEngine.UI;

public class Hearts : MonoBehaviour
{

    public Sprite[] initialHeart;
    private int hearts;
    private int currentHearts;
    // Use this for initialization

    //Used for chaching Image so that you won't be doing GetComponent<Image>(); each time
    Image heartImage;

    void Start()
    {
        //Cache the Image once so that you won't be doing GetComponent<Image>(); each time
        heartImage = GetComponent<Image>();
        heartImage.sprite = initialHeart[0];
        hearts = initialHeart.Length;
        }

    // Update is called once per frame
    void Update()
    {
    }

    public bool TakeHeart()
    {
        if (hearts < 0)
        {
            return false;
        }

        if (currentHearts < (hearts - 1))
        {
            currentHearts += 1;
            heartImage.sprite = initialHeart[currentHearts];
            return true;
        }
        else
        {
            return false;
        }
    }

    public bool AddHeart()
    {
        if (currentHearts > 0)
        {
            currentHearts -= 1;
            heartImage.sprite = initialHeart[currentHearts];
            return true;
        }
        else
        {
            return false;

        }
    }
}

I put as initial 3 hearts, the inspector put size 3:

array 0: 3 hearts

array 1: 2 hearts

array 2: 1 heart

If the player collides with a bomb (prefab) he loses a heart, if he has no heart called the screen "GameOver".

Everything works perfectly fine. But I decided to do a test, i'm creating an "upgrade" if I get a skin for the player, I get along more '2' hearts.

At inspector put size 5

array 0: 5 hearts

array 1: 4 hearts

array 2: 3 hearts

array 3: 2 hearts

array 4: 1 heart

My problem occurs when I put the Script:heartImage.sprite = initialHeart[3]; the game begins with only "3" hearts.

When the player collides with a bomb (prefab), he gains a life rather than lose one life, but the following collisions it begins to lose life normally until the game is over.

If I start with 3 hearts and "caught" an extra heart in the game does not change, rather than up 3 to 4, I still remain with 3 hearts.

After I collide with the first bomb (prefab) and gain 1 heart instead of losing, the script starts running normally. If you collide with the bomb, i lose, if caught an extra heart i win.

I want to know why when I change the heartImage.sprite = initialHeart[0]; (5 hearts) to heartImage.sprite = initialHeart[2]; (3 hearts), appears this bug in the first collision.

Edit

I found where the problem but do not know how to solve it.

My array will be fixed 5, but sometimes I want to start [0] (5 hearts) and other situations that start the [2] (3 hearts).

Inside the Start (), declared heartImage.sprite = initialHeart [2]; (initial 3 hearts) . But within the TakeHeart method has the function that takes Hearts.

if (currentHearts <(hearts - 1))
{
currentHearts + = 1;
heartImage.sprite = initialHeart [currentHearts]; ;
return true;
}

It turns out that when I declare that: heartImage.sprite = initialHeart [currentHearts];

I'm saying initialHeart[1] (4 hearts), but should be [3] (2 hearts)

It is possible to do something to add: initialHeart [currentHearts] + initialHeart [2]; `?

Thus the result of intialHeart would [3] (2 hearts), the way I want.

Answer 1

Try defining currentHearts as 2 in the Start method... When you add 1 to it, it'll be 3 and you'll access the index 3 of the array.

currentHearts = 2;