| textToMeasure | 要测量的文本。 |
| width | 建议的宽度。可以为零。 |
| widthMode | 宽度限制。 |
| height | 建议的高度。 |
| heightMode | 高度限制。 |
Vector2 返回显示文本字符串所需的水平和垂直大小。
根据元素样式值（如字体、字体大小、自动换行等）计算显示文本字符串所需的大小。
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