Unity学习之打字机效果 NGUIUGUI

没接触NGUI之前，因为有个老师跟我们讲，NGUI这个东西已经被淘汰啦 bla bla bla

然后有个师兄在外面找U3D的工作，回来之后，面试问到 NGUI ，没学过这个东西啊.. bla bla bla

之前用UGUI方法做的打字机思路是这样，在开始时，把字体存在一个string变量里面，然后在update 里用equal去判断是否完成，再将其substr 一下。字符截取一下。

下面的源码 UGUI

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;public class TextTween : MonoBehaviour {Text m_text;string TextString;float Timer=0f;bool isFinish;public float Speed=2f;// Use this for initializationvoid Start () {   m_text = GetComponent<Text> ();TextString = m_text.text;m_text.text = "";}// Update is called once per framevoid Update () {if (m_text.text.Equals (TextString)) {isFinish = true;//字体播放结束 finish  执行 Finsh } else{m_text.text = TextString.Substring (0, (int)(Timer * Speed));Timer += Time.deltaTime;}}
}

而 NGUI 呢。

主要在

在 typewriterEffect中封装好了

chars per Second就是每秒多少字符。

Fade in Time 就是 Fade后显示的时间。

Delay On period 就是在一句后的延迟。

Delay On New Line 呢就是每一行后的延迟。

Scoll view 就是滚动栏啦。其实意思就是跟随滚动的意思。

源码如下

//-------------------------------------------------
//            NGUI: Next-Gen UI kit
// Copyright © 2011-2018 Tasharen Entertainment Inc
//-------------------------------------------------using UnityEngine;
using System.Text;
using System.Collections.Generic;/// <summary>
/// This script is able to fill in the label's text gradually, giving the effect of someone typing or fading in the content over time.
/// </summary>[RequireComponent(typeof(UILabel))]
[AddComponentMenu("NGUI/Interaction/Typewriter Effect")]
public class TypewriterEffect : MonoBehaviour
{static public TypewriterEffect current;struct FadeEntry{public int index;public string text;public float alpha;}/// <summary>/// How many characters will be printed per second./// </summary>public int charsPerSecond = 20;/// <summary>/// How long it takes for each character to fade in./// </summary>public float fadeInTime = 0f;/// <summary>/// How long to pause when a period is encountered (in seconds)./// </summary>public float delayOnPeriod = 0f;/// <summary>/// How long to pause when a new line character is encountered (in seconds)./// </summary>public float delayOnNewLine = 0f;/// <summary>/// If a scroll view is specified, its UpdatePosition() function will be called every time the text is updated./// </summary>public UIScrollView scrollView;/// <summary>/// If set to 'true', the label's dimensions will be that of a fully faded-in content./// </summary>
Chat快问 new  public bool keepFullDimensions = false;/// <summary>/// Event delegate triggered when the typewriter effect finishes./// </summary>public List<EventDelegate> onFinished = new List<EventDelegate>();UILabel mLabel;string mFullText = "";int mCurrentOffset = 0;float mNextChar = 0f;bool mReset = true;bool mActive = false;BetterList<FadeEntry> mFade = new BetterList<FadeEntry>();/// <summary>/// Whether the typewriter effect is currently active or not./// </summary>public bool isActive { get { return mActive; } }/// <summary>/// Reset the typewriter effect to the beginning of the label./// </summary>public void ResetToBeginning (){Finish();mReset = true;mActive = true;mNextChar = 0f;mCurrentOffset = 0;Update();}/// <summary>/// Finish the typewriter operation and show all the text right away./// </summary>public void Finish (){if (mActive){mActive = false;if (!mReset){mCurrentOffset = mFullText.Length;mFade.Clear();mLabel.text = mFullText;}if (keepFullDimensions && scrollView != null)scrollView.UpdatePosition();current = this;EventDelegate.Execute(onFinished);current = null;}}void OnEnable () { mReset = true; mActive = true; }void OnDisable () { Finish(); }void Update (){if (!mActive) return;if (mReset){mCurrentOffset = 0;mReset = false;mLabel = GetComponent<UILabel>();mFullText = mLabel.processedText;mFade.Clear();if (keepFullDimensions && scrollView != null) scrollView.UpdatePosition();}if (string.IsNullOrEmpty(mFullText)) return;var len = mFullText.Length;while (mCurrentOffset < len && mNextChar <= RealTime.time){int lastOffset = mCurrentOffset;charsPerSecond = Mathf.Max(1, charsPerSecond);// Automatically skip all symbolsif (mLabel.supportEncoding)while (NGUIText.ParseSymbol(mFullText, ref mCurrentOffset)) { }++mCurrentOffset;// Reached the end? We're done.if (mCurrentOffset > len) break;// Periods and end-of-line characters should pause for a longer time.float delay = 1f / charsPerSecond;char c = (lastOffset < len) ? mFullText[lastOffset] : '\n';if (c == '\n'){delay += delayOnNewLine;}else if (lastOffset + 1 == len || mFullText[lastOffset + 1] <= ' '){if (c == '.'){if (lastOffset + 2 < len && mFullText[lastOffset + 1] == '.' && mFullText[lastOffset + 2] == '.'){delay += delayOnPeriod * 3f;lastOffset += 2;}else delay += delayOnPeriod;}else if (c == '!' || c == '?'){delay += delayOnPeriod;}}if (mNextChar == 0f){mNextChar = RealTime.time + delay;}else mNextChar += delay;if (fadeInTime != 0f){// There is smooth fading involvedFadeEntry fe = new FadeEntry();fe.index = lastOffset;fe.alpha = 0f;fe.text = mFullText.Substring(lastOffset, mCurrentOffset - lastOffset);mFade.Add(fe);}else{// No smooth fading necessarymLabel.text = keepFullDimensions ?mFullText.Substring(0, mCurrentOffset) + "[00]" + mFullText.Substring(mCurrentOffset) :mFullText.Substring(0, mCurrentOffset);// If a scroll view was specified, update its positionif (!keepFullDimensions && scrollView != null) scrollView.UpdatePosition();}}// Alpha-based fadingif (mCurrentOffset >= len && mFade.size == 0){mLabel.text = mFullText;current = this;EventDelegate.Execute(onFinished);current = null;mActive = false;}else if (mFade.size != 0){for (int i = 0; i < mFade.size; ){FadeEntry fe = mFade[i];fe.alpha += RealTime.deltaTime / fadeInTime;if (fe.alpha < 1f){mFade[i] = fe;++i;}else mFade.RemoveAt(i);}if (mFade.size == 0){if (keepFullDimensions){mLabel.text = mFullText.Substring(0, mCurrentOffset) + "[00]" + mFullText.Substring(mCurrentOffset);}else mLabel.text = mFullText.Substring(0, mCurrentOffset);}else{StringBuilder sb = new StringBuilder();for (int i = 0; i < mFade.size; ++i){FadeEntry fe = mFade[i];if (i == 0){sb.Append(mFullText.Substring(0, fe.index));}sb.Append('[');sb.Append(NGUIText.EncodeAlpha(fe.alpha));sb.Append(']');sb.Append(fe.text);}if (keepFullDimensions){sb.Append("[00]");sb.Append(mFullText.Substring(mCurrentOffset));}mLabel.text = sb.ToString();}}}
}
Chat快问 new  public bool keepFullDimensions = false;/// <summary>/// Event delegate triggered when the typewriter effect finishes./// </summary>public List<EventDelegate> onFinished = new List<EventDelegate>();UILabel mLabel;string mFullText = "";int mCurrentOffset = 0;float mNextChar = 0f;bool mReset = true;bool mActive = false;BetterList<FadeEntry> mFade = new BetterList<FadeEntry>();/// <summary>/// Whether the typewriter effect is currently active or not./// </summary>public bool isActive { get { return mActive; } }/// <summary>/// Reset the typewriter effect to the beginning of the label./// </summary>public void ResetToBeginning (){Finish();mReset = true;mActive = true;mNextChar = 0f;mCurrentOffset = 0;Update();}/// <summary>/// Finish the typewriter operation and show all the text right away./// </summary>public void Finish (){if (mActive){mActive = false;if (!mReset){mCurrentOffset = mFullText.Length;mFade.Clear();mLabel.text = mFullText;}if (keepFullDimensions && scrollView != null)scrollView.UpdatePosition();current = this;EventDelegate.Execute(onFinished);current = null;}}void OnEnable () { mReset = true; mActive = true; }void OnDisable () { Finish(); }void Update (){if (!mActive) return;if (mReset){mCurrentOffset = 0;mReset = false;mLabel = GetComponent<UILabel>();mFullText = mLabel.processedText;mFade.Clear();if (keepFullDimensions && scrollView != null) scrollView.UpdatePosition();}if (string.IsNullOrEmpty(mFullText)) return;var len = mFullText.Length;while (mCurrentOffset < len && mNextChar <= RealTime.time){int lastOffset = mCurrentOffset;charsPerSecond = Mathf.Max(1, charsPerSecond);// Automatically skip all symbolsif (mLabel.supportEncoding)while (NGUIText.ParseSymbol(mFullText, ref mCurrentOffset)) { }++mCurrentOffset;// Reached the end? We're done.if (mCurrentOffset > len) break;// Periods and end-of-line characters should pause for a longer time.float delay = 1f / charsPerSecond;char c = (lastOffset < len) ? mFullText[lastOffset] : '\n';if (c == '\n'){delay += delayOnNewLine;}else if (lastOffset + 1 == len || mFullText[lastOffset + 1] <= ' '){if (c == '.'){if (lastOffset + 2 < len && mFullText[lastOffset + 1] == '.' && mFullText[lastOffset + 2] == '.'){delay += delayOnPeriod * 3f;lastOffset += 2;}else delay += delayOnPeriod;}else if (c == '!' || c == '?'){delay += delayOnPeriod;}}if (mNextChar == 0f){mNextChar = RealTime.time + delay;}else mNextChar += delay;if (fadeInTime != 0f){// There is smooth fading involvedFadeEntry fe = new FadeEntry();fe.index = lastOffset;fe.alpha = 0f;fe.text = mFullText.Substring(lastOffset, mCurrentOffset - lastOffset);mFade.Add(fe);}else{// No smooth fading necessarymLabel.text = keepFullDimensions ?mFullText.Substring(0, mCurrentOffset) + "[00]" + mFullText.Substring(mCurrentOffset) :mFullText.Substring(0, mCurrentOffset);// If a scroll view was specified, update its positionif (!keepFullDimensions && scrollView != null) scrollView.UpdatePosition();}}// Alpha-based fadingif (mCurrentOffset >= len && mFade.size == 0){mLabel.text = mFullText;current = this;EventDelegate.Execute(onFinished);current = null;mActive = false;}else if (mFade.size != 0){for (int i = 0; i < mFade.size; ){FadeEntry fe = mFade[i];fe.alpha += RealTime.deltaTime / fadeInTime;if (fe.alpha < 1f){mFade[i] = fe;++i;}else mFade.RemoveAt(i);}if (mFade.size == 0){if (keepFullDimensions){mLabel.text = mFullText.Substring(0, mCurrentOffset) + "[00]" + mFullText.Substring(mCurrentOffset);}else mLabel.text = mFullText.Substring(0, mCurrentOffset);}else{StringBuilder sb = new StringBuilder();for (int i = 0; i < mFade.size; ++i){FadeEntry fe = mFade[i];if (i == 0){sb.Append(mFullText.Substring(0, fe.index));}sb.Append('[');sb.Append(NGUIText.EncodeAlpha(fe.alpha));sb.Append(']');sb.Append(fe.text);}if (keepFullDimensions){sb.Append("[00]");sb.Append(mFullText.Substring(mCurrentOffset));}mLabel.text = sb.ToString();}}}
}

 scrollView.UpdatePosition();

 StringBuilder sb = new StringBuilder();

这个是为了减少内存的使用，优化方面的。

就是更新位置啦，

做打字机效果

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