why doesn't my keypress work?

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

public class Displayui : MonoBehaviour {

public GameObject capsule;
public Text display;
public Text interact;

void Start () {
	capsule = capsule.GetComponent<GameObject> ();
	display = display.GetComponent<Text> ();
	interact = interact.GetComponent<Text> ();
	display.enabled = false;
	interact.enabled = false;
}



void OnTriggerEnter(Collider capsule)
{
	display.enabled = true;
	if (Input.GetKeyDown(KeyCode.E)) {
		display.enabled = false;	
		interact.enabled = true;
	}
}



void OnTriggerExit(Collider capsule)
	
{
	display.enabled = false;
	interact.enabled = false;
}

}
so Im planning to get a interact key inside a collider / OnTriggerEvent is it possible? thanks

@alagimel26 Use onTriggerStay it is called once per frame unlike OnTriggerEnter

 public GameObject capsule;
 public Text display;
 public Text interact;
 public bool pressed;

void Start () {
     capsule = capsule.GetComponent<GameObject> ();
     display = display.GetComponent<Text> ();
     interact = interact.GetComponent<Text> ();
     display.enabled = false;
     interact.enabled = false;
 }
 
void Update()
{
       if (Input.GetKeyDown(KeyCode.E))
       {
             pressed = true;
       }

       if(Input.GetKeyUp(KeyCode.E))
       {
             pressed = false;
       }
}
 
void OnTriggerStay(Collider capsule)
 {
     display.enabled = true;

     if (pressed)
     {
         display.enabled = false;    
         interact.enabled = true;
     }
 }
 
 void OnTriggerExit(Collider capsule)
     
 {
     display.enabled = false;
     Interact.enabled = false;
 }