如何实现自动换行？ [英] How do I implement word wrap?

问题描述

XNA有SpriteFont类类，它有一个MeasureString方法，它可以返回宽度和字符串的高度。我想了解如何创建插在正确的地方的方法，这将有效地 Environment.Newline 返回一个字符串，因此，如果符合一定的宽度和高度（ 。矩形作为一个参数）

XNA has Spritefont class, which has a MeasureString method, which can return the Width and Height of a string. I'm trying to understand how to create a method that will efficiently return a string with Environment.Newline inserted in the right places, so that if fits a certain Width and Height (Rectangle is used as a parameter for that).

推荐答案

我发现下面的代码：的 XNA - 基本的文字包装

I found following code: XNA - Basic Word Wrapping

public string WrapText(SpriteFont spriteFont, string text, float maxLineWidth)
{
    string[] words = text.Split(' ');
    StringBuilder sb = new StringBuilder();
    float lineWidth = 0f;
    float spaceWidth = spriteFont.MeasureString(" ").X;

    foreach (string word in words)
    {
        Vector2 size = spriteFont.MeasureString(word);

        if (lineWidth + size.X < maxLineWidth)
        {
            sb.Append(word + " ");
            lineWidth += size.X + spaceWidth;
        }
        else
        {
            sb.Append("\n" + word + " ");
            lineWidth = size.X + spaceWidth;
        }
    }

    return sb.ToString();
}

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