unity实现打字机效果

unity实现打字机效果

实现思路： 做一个定时器，每次达到时间更新一次Text
方法二： 导入Dotween，text.DoText(“XXX”,5f)

using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Text))]
public class TypewriterEffect : MonoBehaviour
{
	private float intervalTime = 0.2f;//打字时间间隔
	private string words;//保存需要显示的文字
	private bool isActive = false;
	private float timer;//计时器
	private Text myText;
	private int currentPos = 0;//当前打字位置
	private System.Action finishCallBack;

	void Awake()
	{
		//timer = 0;
		//isActive = true;
		//intervalTime = Mathf.Max(0.2f, intervalTime);
		//words = myText.text;
		myText = GetComponent<Text>();
		myText.text = "";
	}

	void Update()
	{
		if (isActive)
		{
			UpdateWorldWrite();
		}
	}

	/// <summary>
	/// 更新打字效果
	/// </summary>
	void UpdateWorldWrite()
	{
		if (isActive)
		{
			timer += Time.unscaledDeltaTime;
			if (timer >= intervalTime)
			{//判断计时器时间是否到达
				timer = 0;
				currentPos++;
				myText.text = words.Substring(0, currentPos);//刷新文本显示内容

				if (currentPos >= words.Length)
				{
					OnFinish();
				}
			}

		}
	}
	/// <summary>
	/// 结束打字，初始化数据
	/// </summary>
	void OnFinish()
	{
		isActive = false;
		timer = 0;
		currentPos = 0;
		myText.text = words;
		if (this.finishCallBack != null)
			this.finishCallBack();
	}

	/// <summary>
	/// 外部调用接口
	/// </summary>
	/// <param name="text">显示文字</param>
	/// <param name="_intervalTime">间隔时间</param>
	/// <param name="finishCallBack">动画完成回调</param>
	public void ShowText(string _text, float _intervalTime, System.Action _finishCallBack)
	{
		this.finishCallBack = _finishCallBack;
		timer = 0;
		currentPos = 0;
		intervalTime = Mathf.Max(0.2f, _intervalTime);
		words = _text;
		if (myText != null)
			myText.text = "";
		if (!string.IsNullOrEmpty(_text))
		{
			isActive = true;
		}
	}
}

本文地址：https://blog.csdn.net/qq_34937637/article/details/107897411