positionAbsolute method
absolute -->gt; 绝对定位
Implementation
Widget positionAbsolute({
double? top,
double? right,
double? bottom,
double? left,
double? width,
double? height,
}) {
_isPositioned = true;
_positionTop = top;
_positionRight = right;
_positionBottom = bottom;
_positionLeft = left;
_positionWidth = width;
_positionHeight = height;
return build();
}