Unity ugui disables Emoji, but this method is also applicable to other ui component systems

It can be mounted on the text input component that needs to block emoji.
The core processing code is to eliminate the input single character.
It has been tested on ios and Android devices, and it can take effect.
It can effectively prohibit unexpected Emoji input.

using System.Globalization;
using UnityEngine;
using UnityEngine.UI;

public class InputMaskEmoji : MonoBehaviour
{
    
    
    /// <summary>
    /// 需要屏蔽Emoji的输入框
    /// </summary>
    private InputField m_inputField;

    private void Awake()
    {
    
    
        m_inputField = gameObject.GetComponent<InputField>();

        if (m_inputField == null)
        {
    
    
            LogUtils.LogError("[m_inputField] can't find:" + this.gameObject.name);
        }
        else
        {
    
    
            m_inputField.onValidateInput += (_text, _index, _addedChar) =>
            {
    
    
                // Filter out the Unicode categories you want (example below),
                // keep in mind that, while this can filter out Emojis,
                // it can also filter out chars you might want to keep
                // (e.g. Asiatic languages, which I don't need to care about right now),
                // so this is not a perfect solution.
                var _unicodeCategory = char.GetUnicodeCategory(_addedChar);

                switch (_unicodeCategory)
                {
    
    
                    case UnicodeCategory.OtherSymbol:
                    case UnicodeCategory.Surrogate:
                    case UnicodeCategory.ModifierSymbol:
                    case UnicodeCategory.NonSpacingMark:
                        {
    
    
                            return char.MinValue;
                        }
                    default:
                        {
    
    
                            return _addedChar;
                        }
                }
            };
        }
    }
}