ugui中text的打字机渐显功能

最新推荐文章于 2024-10-15 18:22:19 发布

xiyouice

最新推荐文章于 2024-10-15 18:22:19 发布

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分类专栏： u3d 文章标签： unity

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using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System.Collections.Generic;

public class Typewriter_alpha : MonoBehaviour {
    public float TimeSpan = 0.1f;
    public int ColorSpan = 50;//1-50
    public bool ColorAlphaSpan = true;
    private bool changeFlag = true;
    private string originStr;
    private string nowStr;
    private int index;
    private float timePiece;
    private string originColor;
    private Dictionary<int,int> alphaLine = new Dictionary<int, int>();

    private string ColorToHex(Color color){
        int Val = 0;
        Val |= Mathf.RoundToInt (color.r * 255f) << 24;
        Val |= Mathf.RoundToInt (color.g * 255f) << 16;
        Val |= Mathf.RoundToInt (color.b * 255f) << 8;
        Val |= Mathf.RoundToInt (color.a * 255f);
        return Val.ToString ("x8").Substring(0,6); //返回值去掉alpha值
    }

    //<color=#0000ff00></color> rgba a:0%00 25%40 50%80 100%ff 
    //使单字透明度渐变 需要加注 
    // Use this for initialization
    void OnEnable () {
        originStr = this.GetComponent<Text> ().text;
        originColor = ColorToHex (this.GetComponent<Text> ().color);
        this.GetComponent<Text> ().text = "";
        nowStr = "";
        index = 1;
        changeFlag = true;
        timePiece = Time.time;
        alphaLine.Clear ();
        if (ColorAlphaSpan)
            alphaLine.Add (0, 0);
    }

    // Update is called once per frame
    void Update () {
        if (Time.time - timePiece > TimeSpan&&changeFlag) {
            if (ColorAlphaSpan) {
                if (alphaLine.Count != 0) {
                    for (int i = 0; i < index; ++i) {
                        if (i == index - 1 && !alphaLine.ContainsKey (i)) {
                            alphaLine.Add (i, 0);
                        }
                        if (alphaLine.ContainsKey (i)) {
                            if (alphaLine [i] >= 100) {
                                alphaLine.Remove (i);
                                nowStr += originStr.Substring (i, 1);
                                if (alphaLine.Count == 0)
                                    nowStr = originStr;
                            } else {
                                nowStr += "<color=#" + originColor;
                                //int值小于10的时候补个0 不然就显示为白色而不是透明度很低的颜色了
                                if (alphaLine [i] < 10)
                                    nowStr += "0"+alphaLine[i]+">";
                                else
                                    nowStr += alphaLine [i].ToString () + ">";
                                nowStr += originStr.Substring (i, 1);
                                nowStr += "</color>";
                                alphaLine [i] += ColorSpan;
                            }
                        } else {
                            nowStr += originStr.Substring (i, 1);
                        }
                    }
                    this.GetComponent<Text> ().text = nowStr;
                    nowStr = "";
                    if (index < originStr.Length)
                        index++;
                } else {
                    changeFlag = false;
                }
            } else {
                this.GetComponent<Text> ().text = originStr.Substring (0, index++);
                if (index > originStr.Length)
                    changeFlag = false;
            }
            timePiece = Time.time;
        }


    }
}