UI 文本未更新

Question

I know, so many of people have asked this question. I have gone to all of those posts, and none of the solutions have solved my problem. i am creating a level progress bar, here in this script i am trying to update text (levelNumber) and add +1 to levelNumber every time level is completed, here i am using playerprefs to save levelNumber so data can passes through next levels(scenes). but problem is levelNumber not even updating in Text field, as per script Text_1 should start from 0 and Text_2 from 1 when game starts its showing values which i have given in inspector 1 and 2. to confirm that i have changed values in inspector to 21 and 30 again when game starts its showing 21 and 30. that means UI Text not updating from script.

public class PrograssBar : MonoBehaviour
{
 [SerializeField] private Text Text_1;
 [SerializeField] private Text Text_2;
 private int levelNumber = 0;
 [SerializeField] Transform startTransform;
 Transform finishTransform;
 [SerializeField] Slider slider;

 float maxDistance;


 void OnEnable()
 {
     levelNumber = 0;
 }

 void Start()
 {
     finishTransform = GameObject.FindGameObjectWithTag("CloneGoal").GetComponent<Transform>();
     maxDistance = getDistance();
     levelNumber = PlayerPrefs.GetInt("LevelNumber");

 }


 void Update()
 {
     if (startTransform.position.z <= maxDistance)
     {
         float distance = 1 - (getDistance() / maxDistance);
         setProgress(distance);
     }

 }

 float getDistance()
 {

     return Vector3.Distance(startTransform.position, (finishTransform.position - new Vector3(0, 0, 22)));
 }


 void setProgress(float p)
 {
     slider.value = p;
 }

 private void LevelUp()
 {
     UpdateLevel(levelNumber + 1);
     PlayerPrefs.SetInt("LevelNumber", levelNumber);
 }

 private void UpdateLevel(int levelNumber)
 {
     this.levelNumber = levelNumber;
     Text_1.text = " " +this.levelNumber.ToString();
     Text_2.text = " " +(this.levelNumber + 1).ToString();
 }

}

Answer 1

The problem is that you never save your levelNumber to prefs during your execution, so your LevelUp function should look like:

private void LevelUp()
{
     UpdateLevel(levelNumber + 1);
     PlayerPrefs.SetInt("LevelNumber", levelNumber);
     PlayerPrefs.Save();
}

See this doc

Answer 2

In the method private void UpdateLevel(int level) you're setting this.levelNumber = levelNumber . And the attribute of a method is int level . So you might want to do:

this.levelNumber = level;

And I'm not quite sure where you're calling the method private void LevelUp() since it's private and it's not called anywhere inside this class.