using System.Collections; using UnityEngine; using UnityEngine.UI; public class TextMoveHelper : MonoBehaviour { public Text textComp; public Canvas canvas; public Text text; public Vector3 GetPosAtText(Canvas canvas, Text text,string strFragment) { int strFragmentIndex = text.text.IndexOf(strFragment);//-1表示不包含strFragment Vector3 stringPos = Vector3.zero; if (strFragmentIndex>-1) { Vector3 firstPos = GetPosAtText(canvas, text, strFragmentIndex + 1); Vector3 lastPos= GetPosAtText(canvas, text, strFragmentIndex+strFragment.Length); stringPos = (firstPos + lastPos) * 0.5f; } else { stringPos= GetPosAtText(canvas, text, strFragmentIndex); } return stringPos; } /// <summary> /// 得到Text中字符的位置;canvas:所在的Canvas,text:需要定位的Text,charIndex:Text中的字符位置 /// </summary> public Vector3 GetPosAtText(Canvas canvas,Text text,int charIndex) { string textStr = text.text; Vector3 charPos = Vector3.zero; if (charIndex <= textStr.Length && charIndex > 0) { TextGenerator textGen = new TextGenerator(textStr.Length); Vector2 extents = text.gameObject.GetComponent<RectTransform>().rect.size; textGen.Populate(textStr, text.GetGenerationSettings(extents)); int newLine = textStr.Substring(0, charIndex).Split('\n').Length - 1; int whiteSpace = textStr.Substring(0, charIndex).Split(' ').Length - 1; int indexOfTextQuad = (charIndex * 4) + (newLine * 4) - 4; if (indexOfTextQuad < textGen.vertexCount) { charPos = (textGen.verts[indexOfTextQuad].position + textGen.verts[indexOfTextQuad + 1].position + textGen.verts[indexOfTextQuad + 2].position + textGen.verts[indexOfTextQuad + 3].position) / 4f; } } charPos /= canvas.scaleFactor;//适应不同分辨率的屏幕 charPos = text.transform.TransformPoint(charPos);//转换为世界坐标 return charPos; } string a = "跟"; string b = "一起"; string c = "学习"; string d = "学习中文"; int i = 0; void OnGUI() { if (GUI.Button(new Rect(10, 10, 100, 80), "Test")) { switch (i) { case 0: StartCoroutine(LerpMove(a)); break; case 1: StartCoroutine(LerpMove(b)); break; case 2: StartCoroutine(LerpMove(c)); break; case 3: StartCoroutine(LerpMove(d)); i = -1; break; } i++; } } IEnumerator LerpMove(string content) { text.text = content; text.rectTransform.position = GetPosAtText(canvas, textComp, content); Vector3 endPos = canvas.transform.TransformPoint(Vector3.zero); yield return new WaitForSeconds(0.3f); yield return new WaitUntil(() =>{ text.rectTransform.position = Vector3.Lerp(text.rectTransform.position, endPos, Time.deltaTime); return Vector3.Distance(text.rectTransform.position, endPos) <0.1f; }); } }
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来源:https://www.cnblogs.com/Jason-c/p/10573567.html