即从初始点到终止点;square 在初试点与终止点绘制一个方块;round 即在初试点与终止点绘制一个圆角;
canvas.drawLine(
Offset(30.0, 30.0), Offset(Screen.width...- 30.0, 30.0), Paint());
canvas.drawLine(
Offset(30.0, 60.0), Offset(Screen.width - 30.0, 60.0),...Paint()..strokeWidth = 8.0..isAntiAlias = true);
canvas.drawLine(
Offset(30.0, 120.0), Offset(Screen.width.....isAntiAlias = true..strokeCap = StrokeCap.round);
canvas.drawLine(
Offset(30.0, 90.0), Offset(Screen.width...- 30.0, 30.0), Paint());
canvas.drawLine(
Offset(30.0, 60.0), Offset(Screen.width - 30.0, 60.0),