使用Flutter也可以訪問低階別的繪畫呼叫。
自定義Painter ;
class MyPainter extends CustomPainter{
@override
void paint(Canvas canvas,Size size){
canvas.drawLine();
...
}
@override
bool shouldRepaint(CustomPainter old){
return old.myParameter !=myParameter;
}
}
複製程式碼將Painter新增到CustomPaint小部件中;
CustomPaint(
size:Size(200,100),
painter:MyPainter(),
)
複製程式碼