rect_getter library Null safety

Classes

RectGetter
需要实时获得某个Widget的Rect信息时使用该控件 可选传GlobalKey和无参两种构造方式,之后利用对象本身或者构造传入的key以获取信息 Use this widget to get a widget`s rectangle information in real-time . It has 2 constructors , pass a GlobalKey or use default key , and then you can use the key or object itself to get info .
RectGetterState