Flutter 在方向生成器中使用约束而不是LayoutBuilder
我正在使用下面这样的约束Flutter 在方向生成器中使用约束而不是LayoutBuilder,flutter,orientation,Flutter,Orientation,我正在使用下面这样的约束 Widget build(BuildContext context) => LayoutBuilder( builder: (context, constrain){ return Container( alignment: Alignment(1.0,-1.0), child: FlatButton( onPressed: onPressed, padding: EdgeInsets.a
Widget build(BuildContext context) => LayoutBuilder(
builder: (context, constrain){
return Container(
alignment: Alignment(1.0,-1.0),
child: FlatButton(
onPressed: onPressed,
padding: EdgeInsets.all(constrain.maxHeight / 414 * 30),
child: Image.asset('images/BackIcon.png',height:constrain.maxHeight / 414 * 50)
)
);
});
现在我想使用OrientationBuilder而不是LayoutBuilder
但是,在OrientationBuilder???
Widget build(BuildContext context) => OrientationBuilder(
builder: (context, orientation) {
if (orientation == Orientation.portrait){
}
else {
return Container(
alignment: Alignment(1.0,-1.0),
child: FlatButton(
onPressed: onPressed,
padding: EdgeInsets.all(constrain.maxHeight / 414 * 30),
child: Image.asset('images/BackIcon.png',height:constrain.maxHeight / 414 * 50)
)
);
}
});
为什么不简单地使用
final-Orientation=constraints.maxWidth>constraints.maxHeight?方位.风景:方位.肖像代码>内部LayouBuilder?