setting a high score from score and showing it in unity2D game

Question

I have a score in my game that increments at certain points! this is working fine but i want a saved high score and unsure how to implement playerprefs as i am still getting to grips with unity and c#! so far i have placed a ui text element in my canvas and this is called High Score: 0 i would like the 0 to hold and save the high score! the working score that increments at the moment is in the update method. EDIT, just to point out this is not a duplicate of a link posted below! both are looking for different answers to a question that seems similar but is not

public class Player : MonoBehaviour {

public string currentColor;

public float jumpForce = 10f;

public Rigidbody2D circle;
public SpriteRenderer sr;

public Color blue;
public Color yellow;
public Color pink;
public Color purple;

public static int score = 0;
public Text scoreText;


public GameObject obsticle;
public GameObject colorChanger;

void Start () {

    setRandomColor ();
    circle.isKinematic = true;

}

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

        if (Input.GetButtonDown ("Jump") || Input.GetMouseButtonDown (0)) 

        {
        circle.isKinematic = false;
            circle.velocity = Vector2.up * jumpForce;
        }

    scoreText.text = score.ToString ();

}

private void OnTriggerEnter2D(Collider2D collision)
{
    if (collision.tag == "Scored") 
    {
        score++;
        Destroy (collision.gameObject);
        Instantiate (obsticle, new Vector2(transform.position.x,transform.position.y + 7f), transform.rotation);
        return;
    }

    if (collision.tag == "ColorChanger") 
    {
        setRandomColor ();
        Destroy (collision.gameObject);
        Instantiate(colorChanger, new Vector2(transform.position.x,transform.position.y + 7f), transform.rotation);
        return;
    }

    if (collision.tag != currentColor) {
        Debug.Log ("You Died");
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
        score = 0;
    }

    if (collision.tag == "Floor") 
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
    }
}

void setRandomColor()
{
    int rand = Random.Range (0, 4);

    switch (rand) 
    {
    case 0:
        currentColor = "Blue";
        sr.color = blue;
        break;

    case 1:
        currentColor = "Yellow";
        sr.color = yellow;
        break;

    case 2:
        currentColor = "Pink";
        sr.color = pink;
        break;

    case 3:
        currentColor = "Purple";
        sr.color = purple;
        break;
    }
}

}

Answer 1

There doesn't appear to be anything wrong with incrementing the score. If you want to save a high score and have it persist across games, I recommend making a .txt file in your Assets folder, and writing the score to it if it's greater than what's in the file. I haven't tested it because I'm on my phone but something like this should work:

using System.IO;

public Text highScoreText;

void Start() {
    highScoreText.text = File.ReadAllText(TEXTFILEPATH);
}

if (collision.tag != currentColor) {
    Debug.Log ("You Died");

    if (File.Exists(TEXTFILEPATH) {
        int highScore = int.TryParse(File.ReadAllText(TEXTFILEPATH);
        if(score > highScore) {
            File.WriteAllText(TEXTFILEPATH, score.ToString());
        }
    else {
        File.WriteAllText(TEXTFILEPATH, score.ToString());
    }
    }
SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
score = 0;
}