Unity3d calls between different script functions or parameters

Script communication

If , We have two scripts ：Main.cs,SliderControl.cs. Now hope from SliderControl.cs call Main.cs Function or parameter in .

( One )、 The called script function is static type , Call directly with Class name . Parameters

public class Main: MonoBehaviour {
    

    public static int index = 0;
}
 
//  stay SliderControl.cs Call in index 
int para = Main.index;

( Two )、GameObject.Find(“ The name of the object to which the script is attached ”) Find the game object , Re pass GetComponent< Script name >(). Function name () Call the function in the script , Can only call public Type function

public class Main: MonoBehaviour {
    

    public Vector3 CalculateTransPose(){
    // Be careful ： Must be public function 
    ...
    }
}
 
//  stay SliderControl.cs Call in CalculateTransPose()
public class SliderControl : MonoBehaviour
{
    
    private Slider silder;
    public GameObject _GG1;
    // Start is called before the first frame update
    void Start()
    {
    
        silder = GetComponent<Slider>();
    }

    // Update is called once per frame
    void Update()
    {
    
        silder.value += 0.1f * Time.deltaTime;
        // call Main.cs Medium CalculateTransPose function 
        Vector3 func= _GG1.GetComponent<Main>().CalculateTransPose();

    }
}

( 3、 ... and )、GameObject.Find(“ The name of the object where the script is located ”).SendMessage(“ Function name ”);（ I haven't tried yet ）
// Can call public and private Type function
It is said that , This is the early stage. unity How to provide , This method is out of date , Relatively low in efficiency , Therefore, it is no longer recommended here .

Reference link

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Enemy : MonoBehaviour
{
    
    private void TakeDamage()
    {
    
        
    }
}
 
//  Call... In other scripts TakeDamage() function 
GameObject.Find("Enemy_1").SendMessage("TakeDamage", SendMessageOptions.DontRequireReceiver);

     except SendMessage, also SendMessageUpwards and BroadcastMessage function , The parameters of the three functions are similar , Are all method names + Method parameters + Additional information options consist of .

SendMessageOptions

1. SendMessageOptions.RequireReceiver // If the corresponding function is not found , Will report a mistake ( The default is this state )
2. SendMessageOptions.DontRequireReceiver // Even if the corresponding function is not found , No errors reported , Automatically ignore

difference
SendMessage Push messages only to all scripts of the specified object
SendMessageUpwards Push messages to the specified object and all its parent objects
BroadcastMessage Push messages to the specified object and all its children

Be careful ：
It seems that the object passed can only pass one variable at a time , Therefore, you can package multiple variables into an array for transmission .