TianJin_23/Assets/Scripts/Draw/AddItem.cs

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

public class AddItem : MonoBehaviour {

    public static bool CanAdd = false;
    Canvas canvas;
	void Start ()
    {
         canvas = GameObject.Find("Canvas").gameObject.GetComponent<Canvas>();
         TheAddFather = GameObject.Find("TagFather").gameObject;
	}

    public GameObject TheADD;
    private GameObject TheAddFather;
	void Update () 
    {
       
        if (CanAdd)
        {
            if (Input.GetMouseButton(0))
            {
               GameObject obj=Instantiate(TheADD)as GameObject;
                obj.transform.SetParent(TheAddFather.transform);
                obj.transform.localScale = new Vector3(1, 1, 1);
                //Vector3 sss = .currentCamera.ScreenToWorldPoint(Input.mousePosition);
                //obj.transform.position = sss;
                Vector2 pos;
                if (RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas.transform as RectTransform, Input.mousePosition, canvas.worldCamera, out pos))
                {
                    obj.transform.GetComponent<RectTransform>().anchoredPosition = pos;
                }
                CanAdd = false;
            }
        }
	}
   
}