以编程方式在运行时更改Unity Sprite

Question

I'm new to Unity so this seems like a very basic question but I've been working on it for a while and google and Unity Docs hasn't helped much so:

I want to change the Health sprite shown here:

When my LoseCollider at the bottom of the screen gets triggered. The sprite would change to a 2 health and a 1 health sprite:

In code I'd like to have:

if (health == 3) {
 // Switch to 3 hearts sprite.
 }
 else if (health == 2) {
 // Switch to 2 hearts sprite.
 }
 else if (health == 1) {
 // Switch to 1 heart sprite.
 }

Based on my current code:

How can I change my Sprites?

Answer 1

Hmm, I think I saw the problem. Use this code instead:

    HealthManager hManager;
void OnTriggerEnter2D (Collider2D trigger)
{
    if (hManager.totalHealth >= 3)
    {
        hManager.LoadHealthSprites();
        hManager.totalHealth--;
    }
    else
    {
        levelManager = GameObject.FindObjectOfType<LevelManager>();
        levelManager.LoadLevel("Lose");
    }
}

void Start()
{
    hManager = hpManager.GetComponent<HealthManager>();
}

Answer 2

if(HealthManager.totalHealth>=3) 
{

}

I think there is an logical error. it will never call LoadHealthSprite func if totalHealth is smaller than 3. Change this part as:

if(HealthManager.totalHealth>0)
{

}