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Chapter3.14:A value of type 'Scaffold?' can't be assigned to a variable of type 'Scaffold'. #434

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Zongyoujifeng opened this issue Apr 23, 2021 · 1 comment

Zongyoujifeng commented Apr 23, 2021

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TheSparklingStarrySky commented Nov 3, 2022

      You can do this ：
      // 在 widget 树中向上查找最近的父级`Scaffold`  widget
      Scaffold scaffold = context.findAncestorWidgetOfExactType<Scaffold>() as Scaffold;
      // 直接返回 AppBar的title， 此处实际上是Text("Context测试")
      return (scaffold.appBar as AppBar).title as Widget;

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