QingGangLongGu/Assets/_Scripts/Demo/DragManagerDemo/Scripts/DragManager.cs

using UnityEngine;
public class DragManager : MonoBehaviour
{
    IDrag[] drags;
    Target[] targets;
    IDrag currDrag;
    Target currTarget;
    bool right;
    public void Init()
    {
        drags = GetComponentsInChildren<IDrag>(true);
        targets = GetComponentsInChildren<Target>(true);
        for (int i = 0; i < drags.Length; i++)
        {
            drags[i].Init();
        }
        for (int i = 0; i < targets.Length; i++)
        {
            targets[i].Init();
        }
    }
    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            if (currTarget)
            {
                Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
                if (Physics.Raycast(ray, out RaycastHit hit, 1000, 1 << LayerMask.NameToLayer("Target")))
                {
                    if (hit.collider.name == currDrag.name)
                    {
                        currTarget.Focus();
                        right = true;
                    }
                }
                else
                {
                    currTarget.UnFocus();
                    right = false;
                }
            }
        }
        if(Input.GetMouseButtonUp(0))
        {
            if (currTarget)
            {
                if (right)
                {
                    currTarget.Execute();
                }
                currTarget.Hide();
                currTarget = null;
            }
        }
    }
    public void Generate(string name)
    {
        currDrag = GenerateDrag(name);
        currTarget = GenerateTarget(name);
    }
    IDrag GenerateDrag(string name)
    {
        for (int i = 0; i < drags.Length; i++)
        {
            if(name == drags[i].name)
            {
                drags[i].Show();
                return drags[i];
            }
            else
            {
                drags[i].Hide();
            }
        }
        return null;
    }
    Target GenerateTarget(string name)
    {
        for (int i = 0; i < targets.Length; i++)
        {
            if(name == targets[i].name)
            {
                targets[i].Show();
                return targets[i];
            }
            else
            {
                targets[i].Hide();
            }
        }
        return null;
    }
}