1. 插件必须渲染好,
final RenderBox box = globalKey.currentContext.findRenderObject();
final size = box.size;
final topLeftPosition = box.localToGlobal(Offset.zero);
return topLeftPosition.dy;
2. 可以通过context.size获取当前控件的尺寸和位置offset信息
下面是示例,通过contex.size.height可以拿到child控件的高度
class HeightReporter extends StatelessWidget {
final Widget child;
HeightReporter({this.child});
@override
Widget build(BuildContext context) {
return new GestureDetector(
child: child,
onTap: () {
print('Height is ${context.size.height}');
},
);
}
转载于:https://www.cnblogs.com/pythonClub/p/10599324.html
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