Add scrollbar to multiline input field???

I actually just figured this out using elements instead of text (for my uses), but itll work the same.

1. Create a new UI Panel

2. Size it to whatever youd like

3. Create a new UI Scrollbar

4. Place it wherever ud like, mess with the settings to your preferences

5. Create a new UI Text/Input Field/Whatever you want to use

6. On that new UI Text, add a "Scroll Rect" component (UI > Scroll Rect)

7. Set the "Content" to be WHAT you want to have scrolled, so if its a InputBox, you can use the Text child of that for example

8. Depending which way you want to scroll (I assume conventionally, so Vertical) set the Horizontal, Vertical, or both scroll bars to the scroll bar you created

9. Be sure to check the correct rotation of your scrollbar under the "Content", to be "Vertical" (in your case I assume, for conventional ways), or "Horizontal", or both, if you are using both directions

10. Mess with the other settings (mainly movement type and the settings that follow the selected type of movement) how youd like

11. Create some text that goes beyond the set boundaries defined at edit time (so write a bunch of text...), then use the scroll bar

It didnt work for me with scrolling using my mouse wheel, but it could be that I dont have it focused when I do it, you could always make a simple script that if the mouse is scrolled up or down, then just chance the value of the scrollbar by code with a simple += or -= 1 kind of thing.

Hope that works out for you.

Posted a hacky solution to InputField with scrollbar here: http://answers.unity3d.com/questions/932607/putting-a-multiline-inputfield-in-a-scroll-rect.html

This is my modified version of InputFieldMod, removing the highlight and take into account for canvas scale, etc:

 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 using UnityEngine.Events;
 using System.Collections;
 
 namespace SweatyChair.UI
 {
 
     [ExecuteInEditMode]
     [RequireComponent(typeof(InputField))]
     public class InputFieldScroller : UIBehaviour
     {
 
         [Tooltip("The default row count in  InputField, this will be ignored if a ScrollRect is assigned")]
         [Range(1, 50)] [SerializeField] private int _minRowCount = 1;
 
         [Tooltip("Scroll rect parent")]
         [SerializeField] private ScrollRect _scrollRect = null;
 
         private InputField _inputField;
         private RectTransform _rectTransform;
 
         // Layout
         private LayoutElement _layoutElement;
         private HorizontalOrVerticalLayoutGroup _parentLayoutGroup;
 
         private Vector2 _scrollRectSize;
         private float _canvasScaleFactor = 1;
 
         protected override void Awake()
         {
             _inputField = GetComponent<InputField>();
             _inputField.onValueChanged.AddListener(new UnityAction<string>(ResizeInput));
             _rectTransform = GetComponent<RectTransform>();
             CanvasScaler canvasScaler = GetComponentInParent<CanvasScaler>();
             if (canvasScaler)
                 _canvasScaleFactor = canvasScaler.scaleFactor;
             _layoutElement = GetComponent<LayoutElement>();
             _parentLayoutGroup = transform.parent.GetComponent<HorizontalOrVerticalLayoutGroup>();
         }
 
         // Resize input field recttransform
         private void ResizeInput()
         {
             ResizeInput(_inputField.text);
         }
 
         private void ResizeInput(string text)
         {
             // Current text settings
             TextGenerationSettings settings = _inputField.textComponent.GetGenerationSettings(_inputField.textComponent.rectTransform.rect.size);
             settings.generateOutOfBounds = false;
             settings.scaleFactor = _canvasScaleFactor; // HACK: scale factor of settings not following the global scale factor... make sure it do
 
             // Get text padding (min max vertical offset for size calculation)
             float vecticalOffset = _inputField.placeholder.rectTransform.offsetMin.y - _inputField.placeholder.rectTransform.offsetMax.y;
 
             // Preferred text rect height
             float preferredHeight = (new TextGenerator().GetPreferredHeight(text, settings) / _canvasScaleFactor) + vecticalOffset + 10;
             float minHeight;
 
             // Default text rect height (fit to scroll parent or expand to fit text)
             if (_scrollRect)
                 minHeight = _scrollRect.GetComponent<RectTransform>().rect.size.y;
             else
                 minHeight = ((new TextGenerator().GetPreferredHeight("", settings) * _minRowCount) / _canvasScaleFactor) + vecticalOffset;
 
             // Current text rect height
             float currentHeight = _inputField.textComponent.rectTransform.rect.height;
 
             // Force resize
             if (Mathf.Abs(currentHeight - preferredHeight) > Mathf.Epsilon) {
                 float newHeight = Mathf.Max(preferredHeight, minHeight); // At least min height
                 if (_parentLayoutGroup && _layoutElement)
                     _layoutElement.preferredHeight = newHeight;
                 else
                     _rectTransform.sizeDelta = new Vector2(_rectTransform.rect.width, newHeight);
             }
 
             // Scroll to bottom if just added new line
             if (gameObject.activeInHierarchy && _inputField.caretPosition == _inputField.text.Length && _inputField.text.Length > 0 && _inputField.text[_inputField.text.Length - 1] == '\n')
                 StartCoroutine(ScrollToBottomCoroutine());
         }
 
         // Update scroll rect position (after Layout was rebuilt)
         private IEnumerator ScrollToBottomCoroutine()
         {
             yield return new WaitForEndOfFrame();
             if (_scrollRect != null)
                 _scrollRect.verticalNormalizedPosition = 0;
         }
 
     }
 
 }