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HomeWeb Front-endH5 TutorialSVG基础|SVG TSPAN 元素

上一篇文章中我们介绍了如何绘制SVG文本,那么如何绘制多行文本呢?SVG 的4d04eeddb7e8b41623612fd2b0fd5728元素用于绘制SVG多行文本。我们不必每行文本都使用绝对定位来排列制作多行文本,使用4d04eeddb7e8b41623612fd2b0fd5728元素可以非常方便的使一行文本相对于另一行文本来定位。使用4d04eeddb7e8b41623612fd2b0fd5728元素还可以使用户在同一时间里选择和复制多行文字。

 tspan示例

<svg xmlns="http://www.w3.org/2000/svg">
  <text x="20" y="10">
      <tspan>tspan line 1</tspan>
      <tspan>tspan line 2</tspan>
  </text>
</svg>

下面是上面代码的返回结果:

933.png

注意上面的返回结果中,由于4d04eeddb7e8b41623612fd2b0fd5728元素没有设置其它参数,默认情况下第二行文字会紧跟着第一行文字排列。

 垂直定位

如果你希望每一行文字都相对于前一行文字垂直定位,你可以在4d04eeddb7e8b41623612fd2b0fd5728元素中使用dy属性(delta y):

<svg xmlns="http://www.w3.org/2000/svg">
  <text x="20" y="10">
      <tspan>tspan line 1</tspan>
      <tspan dy="10">tspan line 2</tspan>
  </text>
</svg>

现在第二行文字会显示在第一行文字下方,距离为10像素。下面是上面代码的返回结果:

934.png

如果你希望4d04eeddb7e8b41623612fd2b0fd5728元素在text中在垂直方向绝对定位某个指定的数值,可以设置28f128881ce1cdc57a572953e91f7d0f元素的y属性。

如果你在04635a68df61b45b2300cd76f9a098de属性中写了多个数字,那么每一个数字会被应用到4d04eeddb7e8b41623612fd2b0fd5728元素的每一个字符上。看下面的例子:

<svg xmlns="http://www.w3.org/2000/svg">
  <tspan dy="5 10 20">123</tspan>
</svg>

下面是返回结果,注意各个字符在垂直方向上的变化。

935.png

 水平定位

要使每一行文本在X轴方向上相对定位可以使用dx属性(delta x)。下面的例子展示了将dx的值设置为30的效果,现在第二行文字在水平方向上相对于第一行文字向右偏移了30像素。

<svg xmlns="http://www.w3.org/2000/svg">
  <text x="20" y="10">
      <tspan>tspan line 1</tspan>
      <tspan dx="30" dy="10">tspan line 2</tspan>
  </text>
</svg>

936.png

如果你在b6e6e9a4ff1f50b06a2a8175f44864d1属性中写了多个数字,那么每一个数字会被应用到4d04eeddb7e8b41623612fd2b0fd5728元素的每一个字符上。看下面的例子:

<svg xmlns="http://www.w3.org/2000/svg">
  <tspan dx="5 10 20">123</tspan>
</svg>

下面是返回结果,注意各个字符在水平方向上的变化。

937.png

你可以在4d04eeddb7e8b41623612fd2b0fd5728元素设置x属性来修正28f128881ce1cdc57a572953e91f7d0f元素的X坐标。使用这种方法你可以显示多行头部对齐的文字。来看下面的例子,x属性设置为10:

<svg xmlns="http://www.w3.org/2000/svg">
  <text y="10">
      <tspan x="10">tspan line 1</tspan>
      <tspan x="10" dy="15">tspan line 2</tspan>
      <tspan x="10" dy="15">tspan line 3</tspan>
  </text>
</svg>

下面是上面代码的返回结果:

938.png

 为tspan元素添加样式

我们可以为4d04eeddb7e8b41623612fd2b0fd5728元素添加样式,例如你可以将一个4d04eeddb7e8b41623612fd2b0fd5728元素中的文字设置为加粗字体:

<svg xmlns="http://www.w3.org/2000/svg">
  <text y="10">
    这是一个被 <tspan style="font-weight: bold;">加粗</tspan> 的文字。
  </text>
</svg>

下面是上面代码的返回结果:

939.png

 通过baseline-shift设置上标和下标效果

你可以通过baseline-shift CSS属性将一个4d04eeddb7e8b41623612fd2b0fd5728元素设置为上标或下标。看下面的例子:

<text x="10" y="20">
    这是一个tspan元素的 <tspan style="baseline-shift: super;">上标</tspan>
    和 <tspan style="baseline-shift: sub;">下标</tspan> 混合的文本串效果。
</text>

效果如下:

940.png

以上就是SVG基础|SVG TSPAN 元素的内容,更多相关内容请关注PHP中文网(www.php.cn)!


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