How I'll do that when I come as a Player to some object , so the object will give me the key?

How I'll do that when I come as a Player to some object , so the object will give me the key? The point is that whenever I come into his BoxCollider , tells me that I bring him the key , that's ok . But when I'll get the key , I do not want to repeat , but I want to tell me something else. How should I do it? PS : the translation to Google . I come from Slovakia . PS2: DestroyWhenActivated It is a feature that does not need. PS3: Please advise someone , I've it all tangled up . Here are the scripts :

using UnityEngine; using System.Collections; using UnityEngine.UI;

public class TextBoxManager : MonoBehaviour {

 public GameObject textBox;
 public GameObject textBox2;
 public Text theText;
 public Text theText2;
 public TextAsset textFile;  //pole pre Text
 public TextAsset textFile2;
 public string[] textLines;
 public string[] textLines2;
 public int currentLine;
 public int currentLine2;
 public int endAtLine;
 public int endAtLine2;
 public PlayerController player;
 public bool isActive;
 public bool isActive2;
  public bool destroyWhenActivated;
 public bool Lekarnicka;

 void Start () 
 {
     player = FindObjectOfType<PlayerController> ();
     Lekarnicka = false;
     isActive = false;

     if (textFile != null)
     {
         textLines = (textFile.text.Split ('\n'));
     }
     if (textFile2 != null)
     {
         textLines2 = (textFile2.text.Split ('\n'));
     }
     if (endAtLine == 0)
     {
         endAtLine = textLines.Length - 1;
     }
     if (endAtLine2 == 0)
     {
         endAtLine2 = textLines2.Length - 1;
     }
     if (isActive) 
     {
         EnableTextBox ();
     } 
     /*if (Lekarnicka) 
     {
         EnableTextBox2 ();
     }
         */
     else 
     {
         DisableTextBox ();
     }
 }
 void Update()
 {
     if (!isActive)
         {
             return;
         }
     theText.text = textLines [currentLine];
     if (Input.GetKeyDown (KeyCode.L)) 
         {
             currentLine += 1;
         }
     if (currentLine > endAtLine) 
         {
             DisableTextBox ();
         }
     if (Lekarnicka == true && isActive2 == true)
     {
         theText2.text = textLines2 [currentLine2];
         if (Input.GetKeyDown (KeyCode.L)) 
         {
             currentLine2 += 1;
         }
         if (currentLine2 > endAtLine2) 
         {
             DisableTextBox ();
         }
     }
 }

 public void EnableTextBox()
 {
     textBox.SetActive (true);
     isActive = true;
     {
         //player.canMove = false;
     }
 }

 public void EnableTextBox2()
 {
     textBox2.SetActive (true);
 }

 public void DisableTextBox()
 {
     textBox.SetActive (false);
     isActive = false;
     //textBox2.SetActive (false);
     }

 public void DisableTextBox2()
 {
     textBox2.SetActive (false);
     isActive2 = false;
 }
 public void ReloadScript2(TextAsset theText2)
 {
     if (theText2 != null) 
     {
         textLines2 = new string[1];
          textLines2 = (theText2.text.Split ('\n'));
      }
  }

 public void ReloadScript(TextAsset theText)
 {
     if (theText != null) 
     {
         textLines = new string[1];
         textLines = (theText.text.Split ('\n'));
      }
  }

 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.tag == "Player" && (isActive = true)) 
     {
         Lekarnicka = false;
         textBox.SetActive (true);
         isActive = true;
         textBox2.SetActive (true);
         isActive2 = false;
     }
         if (destroyWhenActivated) 
         {
             Destroy (gameObject);
             if (gameObject)
             {
                 textBox.SetActive (false);
                 isActive = false;
                 textBox2.SetActive (false);
             }
         }

     if (other.gameObject.tag == "Lekarnicka") 
     {
         Lekarnicka = true;
         //isActive = true;
         isActive2 = true;
         if (isActive2 == true) 
         {
             isActive = false;
         }
     }
 }

 void OnTriggerExit(Collider other)
 {
     if (other.name == "Player") 
     {
         textBox.SetActive (false);
         isActive = false;
         textBox2.SetActive (false);
         DisableTextBox ();
           DisableTextBox2 ();
      }
  }

}

Second Script:

using UnityEngine; using System.Collections;

public class ActivateTextAtLine : MonoBehaviour { public TextAsset theText; public TextAsset theText2; public int startLine; public int startLine2; public int endLine; public int endLine2; public TextBoxManager theTextBox; public TextBoxManager2 theTextBox2; public bool isActive; public bool isActive2; public bool Lekarnicka; public bool destroyWhenActivated;

 void Start () 
 {
     isActive = false;
     isActive2 = false;
     if(isActive = false)
     {
         if (theTextBox = FindObjectOfType<TextBoxManager> ()) 
         {
             FindObjectOfType<TextBoxManager> ();
         }
     }
     /*if(isActive = true)    
     if (theTextBox2 = FindObjectOfType<TextBoxManager2> ()) 
     {
         FindObjectOfType<TextBoxManager2> ();
     }*/
 }


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

 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.tag == "Player" && (isActive = false)) 
     {
         theTextBox.ReloadScript (theText);
         theTextBox.currentLine = startLine;
         theTextBox.endAtLine = endLine;
             theTextBox.EnableTextBox ();

         if (destroyWhenActivated) 
         {
             Destroy (gameObject);
         }
     }

     if (other.gameObject.tag == "Lekarnicka") 
     {
         Lekarnicka = true;
         isActive2 = true;
     }

     if (other.gameObject.tag == "Player" && Lekarnicka == true) 
     {
         theTextBox2.ReloadScript (theText2);
         theTextBox2.currentLine2 = startLine2;
         theTextBox2.endAtLine2 = endLine2;
         theTextBox2.EnableTextBox2 ();
     }
 }

}

Third Script:

using UnityEngine; using System.Collections; using UnityEngine.UI;

public class TextBoxManager2 : MonoBehaviour {

 public GameObject textBox2;
 public Text theText2;
 public TextAsset textFile2;  //pole pre Text
 public string[] textLines2;
 public int currentLine2;
 public int endAtLine2;
 public PlayerController player;
 public bool isActive;
 public bool destroyWhenActivated;
 public bool Lekarnicka;
 void Start () 
 {
     player = FindObjectOfType<PlayerController> ();

     Lekarnicka = false;
     isActive = false;

     if (textFile2 != null)
     {
         textLines2 = (textFile2.text.Split ('\n'));
     }

     if (endAtLine2 == 0)
     {
         endAtLine2 = textLines2.Length - 1;
     }

     if (isActive) 
     {
         EnableTextBox2 ();
     } 

     else 
     {
         DisableTextBox2 ();
     }
 }

 void Update()
 {
     /*if (!isActive)
     {
         return;
     }

 theText2.text = textLines2 [currentLine2];

     if (Input.GetKeyDown (KeyCode.L)) 
     {
         currentLine2 += 1;
     }

     if (currentLine2 > endAtLine2) 
     {
         DisableTextBox2 ();
     }*/
 }

 public void EnableTextBox2()
 {
     textBox2.SetActive (true);
     isActive = true;
 }

 public void DisableTextBox2()
 {
     textBox2.SetActive (false);
     isActive = false;
 }

 public void ReloadScript(TextAsset theText2)
 {
     if (theText2 != null) 
     {
         textLines2 = new string[1];
         textLines2 = (theText2.text.Split ('\n'));
     }
 }

 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.tag == "Lekarnicka") 
     {
         Lekarnicka = true;
         textBox2.SetActive (true);
         isActive = true;
         //    FindObjectOfType<TextBoxManager2> ();
         //    FindObjectOfType<ActivateTextAtLine2> ();

     }
         if (destroyWhenActivated) 
         {
             Destroy (gameObject);
             if (gameObject)
             {
                 textBox2.SetActive (false);
                 isActive = false;
             }
         }    
     }

 void OnTriggerExit(Collider other)
 {
     if (other.name == "Player") 
     {
         textBox2.SetActive (false);
         isActive = false;
     }
 }

}