Unity realizes mobile game virtual rocker

using ;
using ;
using UnityEngine;
using ;
/// <summary>
/// Rocker class bound to the rocker, reference radius 50/// </summary>
public class Rocker : MonoBehaviour {

  Vector2 m_offet;//Offset vector  Vector2 m_originalPos;//Original screen coordinates of the rocker  Touch[] touches;//Array of touch points on the screen  int touch_Id = -1;//Touch point array subscript  bool isMove = false;//Whether to move  float m_ScreenScale;
  /// <summary>
  /// Inform the rocker parameters to the offset vector called externally  /// </summary>
  public Vector3 Offet
  {
    get
    {
      return m_offet;
    }
  }

  // Use this for initialization
  void Start () {

    m_originalPos = ;//The screen coordinate position of the center of the rocker    m_ScreenScale =  / 800f;
  }

  // Update is called once per frame
  void Update () {
    //Get the screen touch array    touches = ;
    if ( > 0)//If the contact is turned on    {
      //Get the contact index closest to the center of the rocker to touch_Id;      if ( == 1)//When there is only one contact      {
        touch_Id = 0;
      }
      else if ( > 1)//When the contact is greater than 1      {
        touch_Id = 0;//Suppose the subscript is 0 first        for (int i = 1; i < ; i++)//Transfer the contact array        {
          if ((touches[i].position - m_originalPos) < (touches[touch_Id].position - m_originalPos))//The i-th point is closer than the hypothetical point          {
            touch_Id = i;//The assumption point is changed to the i-th point          }
        }

      }

      //If the contacts obtained are not cancelled or lifted      if ((touch_Id).phase !=  && (touch_Id).phase != )
      {
        //The contacts are within the range of the rocker        if((touches[touch_Id].position - m_originalPos) <= 50*50 * m_ScreenScale * m_ScreenScale)//50 is the background radius        {
          isMove = true;//Open remote control          //The joystick starts to control and calculates the offset          SetOffetIn();
        }
        else if(isMove)//The contact is outside the rocker range, but the remote control has been turned on        {
          SetOffetOut();
        }
      }
      else// Lift your fingers and return to the original position      {
         = m_originalPos;
        m_offet = ;
        isMove = false;
        touch_Id = -1;
      }
    }

  }
  /// <summary>
  /// When the contact is in the operating disk  /// How to control the rocker  /// </summary>
  void SetOffetIn()
  {
    //The distance is too small and is considered to be unchanged without offsetting the position of the rocker.    if((touches[touch_Id].position - m_originalPos) < 5 * m_ScreenScale)
    {
      GetComponent<Image>(). = m_originalPos;//The rocker is positioned in the original position      m_offet = ;
    }
    else
    {
      //Rocator position tracking      GetComponent<Image>(). = touches[touch_Id].position;
      m_offet = touches[touch_Id].position - m_originalPos;//Assign offset value      m_offet = m_offet.normalized;//Normalization    }
  }
  /// <summary>
  /// When the contact is outside the operating panel  /// How to control the rocker  /// </summary>
  void SetOffetOut()
  {
    Vector2 tempDir;//Temporary offset vector    tempDir = touches[touch_Id].position - m_originalPos;
    //Update the rocker position: 127 units away from the original position    GetComponent<Image>(). = m_originalPos + () * 25*m_ScreenScale;
    //Offset    m_offet = ;//Normalization  }
  private void OnGUI()
  {
    GUIStyle style = new GUIStyle(); //Instantiate a new GUIStyle with the name style, and use it later     = 50; //The larger the font size setting value, the larger the font, the default color is black     = new Color(1, 1, 1); //Set the text color to new color (0,0,0) Modify the value - represents different colors, the value is integer. I personally think it feels a bit like RGB    (new Rect(20, 30, 300, 60), "Original location:" + m_originalPos.ToString(),style);
    (new Rect(20, 100, 300, 60), "Rocator Position:" + GetComponent<Image>().(), style);
    (new Rect(20, 170, 300, 60), "Contact Position:" + touches[touch_Id].(), style);
    (new Rect(20, 240, 300, 60), "Screen resolution:" + , style);


  }
}