getTextWidth function
获取字体的宽高,放在size中
Implementation
Size getTextWidth({String? text, double? fontsize}) {
//此���主要是拿到text的宽高,然后给个约束,同时把text准确的放到某个位置上
final textPainter = TextPainter(
textDirection: TextDirection.ltr,
text: TextSpan(
text: text,
style: TextStyle(fontSize: fontsize),
),
);
textPainter.layout();
return Size(textPainter.width, textPainter.height);
}