c# - 如何分割长字符串，使其与给定的矩形匹配？

我有一个长字符串，我想将其分成几部分，以便文本的每一行始终位于给定的矩形中。文字不应超过矩形的边框。

矩形的高度不是问题。文本永远不会触及矩形的底部，因为矩形非常高。但是矩形不是很宽。

如何计算应该在每一行中绘制字符串的哪一部分？我不想说一个字。如果单词超出矩形的边界，则应在下一行绘制该单词。

例如，绘制字符串应如下所示：

Cyberpunk 2077 is an upcoming role-playing video game
developed and published by CD Projekt, releasing for
Google Stadia, Microsoft Windows, PlayStation 4, and
...

而不是这样：

Cyberpunk 2077 is an upcoming role-playing video game devel
oped and published by CD Projekt, releasing for Google Stad
ia, Microsoft Windows, PlayStation 4, and Xbox One on 16
...

现在，spriteBatch仅在一行中绘制了整个长字符串，而文本超出了矩形的边框。如何将其正确地分成几行？

Cyberpunk 2077 is an upcoming role-playing video game developed and published by CD Projekt, releasing for Google Stadia, Microsoft Windows, PlayStation 4, and Xbox One on 16 April 2020. Adapted from the 1988 tabletop game Cyberpunk 2020, it is set fifty-seven years later in dystopian Night City, an open world with six distinct regions. In a first-person perspective, players assume the role of the customisable mercenary V, who can reach prominence in hacking, machinery, and combat. V has an arsenal of ranged weapons and options for melee combat.

我使用spriteBatch.DrawString绘制字符串：

string Text = "Cyberpunk 2077 is an upcoming role-playing video game developed and published by CD Projekt, releasing for Google Stadia, Microsoft Windows, PlayStation 4, and Xbox One on 16 April 2020. Adapted from the 1988 tabletop game Cyberpunk 2020, it is set fifty-seven years later in dystopian Night City, an open world with six distinct regions. In a first-person perspective, players assume the role of the customisable mercenary V, who can reach prominence in hacking, machinery, and combat. V has an arsenal of ranged weapons and options for melee combat.";

protected override void Draw(GameTime gameTime)
{
    graphics.GraphicsDevice.Clear(Microsoft.Xna.Framework.Color.CornflowerBlue);
    spriteBatch.Begin();
    spriteBatch.DrawString(Font, Text, new Vector2(200, 300), Microsoft.Xna.Framework.Color.White, 0, Vector2.Zero, 1f, SpriteEffects.None, 0f);
    spriteBatch.End();

    base.Draw(gameTime);
}

更新：
您需要在最后添加以下代码行：


  收益回报缓冲；

    string[] lines = Split(Text, 400, Font).ToArray();

    public static IEnumerable<string> Split(string text, double rectangleWidth, SpriteFont font)
    {
        var words = text.Split(' ');
        string buffer = string.Empty;

        foreach (var word in words)
        {
            var newBuffer = buffer + " " + word;
            if (word == words[0])
              newBuffer = word;
            else
              newBuffer = buffer + " " + word;

            Vector2 FontMeasurements = font.MeasureString(newBuffer);

            if (FontMeasurements.X >= rectangleWidth)
            {
                yield return buffer;
                buffer = word;
            }
            else
            {
                buffer = newBuffer;
            }
        }
        yield return buffer;
    }

画画：

 for (int i = 0; i <= lines.Count() - 1; i++)
   spriteBatch.DrawString(Font, lines[i], new Vector2(300, 500 + i * 30), Microsoft.Xna.Framework.Color.White, 0, Vector2.Zero, 1f, SpriteEffects.None, 0f);

要么：

string boxedText = string.Join('\n', Split(Text, 400, Font));
spriteBatch.DrawString(Font, boxedText, new Vector2(300, 500), Microsoft.Xna.Framework.Color.White, 0, Vector2.Zero, 1f, SpriteEffects.None, 0f);

最佳答案

假设您有一个方法Measure(string text)可以返回文本的实际视觉宽度（如果使用等宽字体则不需要），则可以使用此方法将文本分成几行：

public static IEnumerable<string> Split(string text, double rectangleWidth)
{
    var words = text.Split(' ');
    string buffer = string.Empty;

    foreach (var word in words)
    {
       var newBuffer = buffer + " " + word;

       if (Measure(newBuffer) >= rectangleWidth)
       {
           yield return buffer;
           buffer = word;
       }
       else
       {
           buffer = newBuffer;
       }
    }

    yield return buffer;
}

要将行作为数组获取，请使用string[] lines = Split(text, Rectangle.Width).ToArray()。

如果要用换行符分隔的单个字符串，请使用string boxedText = string.Join('\n', Split(text, Rectangle.Width))。

在您的情况下，您可以这样使用它：

string Text = "Cyberpunk 2077 is an upcoming role-playing video game developed and published by CD Projekt, releasing for Google Stadia, Microsoft Windows, PlayStation 4, and Xbox One on 16 April 2020. Adapted from the 1988 tabletop game Cyberpunk 2020, it is set fifty-seven years later in dystopian Night City, an open world with six distinct regions. In a first-person perspective, players assume the role of the customisable mercenary V, who can reach prominence in hacking, machinery, and combat. V has an arsenal of ranged weapons and options for melee combat.";

protected override void Draw(GameTime gameTime)
{
    graphics.GraphicsDevice.Clear(Microsoft.Xna.Framework.Color.CornflowerBlue);
    spriteBatch.Begin();
    spriteBatch.DrawString(
        Font,
        string.Join(' ', Split(Text, Rectangle.Width)),
        new Vector2(200, 300),
        Microsoft.Xna.Framework.Color.White,
        0,
        Vector2.Zero,
        1f,
        SpriteEffects.None,
        0f);
    spriteBatch.End();

    base.Draw(gameTime);
}

关于c# - 如何分割长字符串，使其与给定的矩形匹配？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/57715767/