Unity使用Font.GetCharacterInfo 和 Font.RequestCharactersInTexture获取UnityEngine.UI.Text文本中每个字符的宽度信息

using UnityEngine;
using UnityEngine.UI;
public class FontTest : MonoBehaviour
{
    void Start()
    {
        Test();
    }
    void Test()
    {
        string str = GetComponent<Text>().text;
        Font font = GetComponent<Text>().font;
        //此处请求生成字符信息
        font.RequestCharactersInTexture(str, GetComponent<Text>().fontSize, FontStyle.Normal);
        char[] charArr = str.ToCharArray();
        int totalWidth = 0;
        CharacterInfo info;
        for(int i = 0; i < charArr.Length; i++)
        {
            char c = charArr[i];
            //此处读取字符信息，需要在前面的RequestCharactersInTexture函数里调用过
            //注意，size和style这两个参数（第3,4个）要和RequestCharactersInTexture的对应参数(第2,3个)保持一致,否则返回false,获取不到字符信息,info里的数据全为0
            bool getCharacterInfoSucc = font.GetCharacterInfo(c, out info, GetComponent<Text>().fontSize,FontStyle.Normal);
            if (getCharacterInfoSucc)
            {
                totalWidth += info.advance;
                Debug.Log("glyphHeight = " + info.glyphHeight.ToString());
            }
            else
            {
                Debug.LogError("getCharacterInfo failed : " + c);
            }
        }
        //这里打印的就是Text组件的宽度了
        Debug.Log("总width为 " + totalWidth.ToString());
    }
}