zoukankan      html  css  js  c++  java
  • UNDERSTANDING ITWEEN CALLBACKS

    One of the most frequent problems I see people have with iTween is with callbacks that don’t fire.

    At it’s core iTween leverages Unity’s SendMessage method for carrying out it’s 3 callbacks: “onStart”, “onUpdate” and “onComplete”. When you add an iTween to a GameObject, iTween will throw all callbacks against the GameObject that is being animated. Where most people have difficulties is when they assign iTweens to GameObjects that don’t physically contain the methods they are attempting to call.

    For example, the following code with never execute the “ShakeComplete” method because the “target” GameObject does not have a script attachted to it containing this method:

    using UnityEngine;
    using System.Collections;
    
    public class UnderstandingCallbacks : MonoBehaviour
    {
    	public GameObject target;
    	
    	void Start ()
    	{
    		iTween.ShakePosition(target, iTween.Hash("x", 1, "onComplete", ShakeComplete));
    	}
    	
    	void ShakeComplete(){
    		Debug.Log("The shake completed!");	
    	}
    }
    

    There’s 2 ways to correct the previous script. The long route: create another script, attach it to our actual “target” GameObject and transfer the “ShakeComplete” method to that new script. The easy route: utilize iTween’s callback “target modifiers”!

    Each of iTween’s 3 callbacks have an additional “target modifier” that can be used to tell iTween to look somewhere else for the callback method: “onStartTarget”, “onUpdateTarget” and “onCompleteTarget”.

    The following corrected script will now fire the “onComplete” callback since we are now using “onCompleteTarget” to tell iTween that the “ShakeComplete” method is located on the GameObject that actually set up the iTween:

    using UnityEngine;
    using System.Collections;
    
    public class UnderstandingCallbacks : MonoBehaviour
    {
    	public GameObject target;
    	
    	void Start ()
    	{
    		iTween.ShakePosition(target, iTween.Hash("x", 1, "onComplete", "ShakeComplete", "onCompleteTarget", gameObject));
    	}
    	
    	void ShakeComplete(){
    		Debug.Log("The shake completed!");	
    	}
    }
    

    I hope this helps clear up unsuccessful callbacks in iTween.

查看全文
  • 相关阅读:
    Entity Framework Core系列教程-26-数据迁移
    Entity Framework Core系列教程-25-Entity Framework Core日志
    Entity Framework Core系列教程-24-使用存储过程
    Entity Framework Core系列教程-23-原生SQL查询
    Entity Framework Core系列教程-22-跟踪实体图(TrackGraph)
    Entity Framework Core系列教程-21-断开模式的实体图(Entity Graph)
    ASP.NET Core项目无法使用命令行执行ef命令
    Entity Framework Core系列教程-5-第一个应用程序
    Entity Framework Core系列教程-20-影子属性(Shadow Property)
    PIE-SDK For C++屏幕坐标和地图坐标转换
  • 原文地址:https://www.cnblogs.com/ldxsuanfa/p/10776195.html
  • Copyright © 2011-2022 走看看