每当我写“style”时，我都会收到一个错误：命名参数未定义

Question

孩子：文本（'嗨'）， 样式：新的 Textstyle()... ... 这是我遇到错误“命名参数未定义”的地方 我尝试重新安装 flutter 和 intellij 本身 在此输入图片描述

Answer 1

在您的代码中，您有：

...
home: new Scaffold(
        body: Center(
          child: Text('works!'),
          style: new TextStyle()
        )
...

但是 Center 类没有

style

属性：

/// A widget that centers its child within itself.
///
/// This widget will be as big as possible if its dimensions are constrained and
/// [widthFactor] and [heightFactor] are null. If a dimension is unconstrained
/// and the corresponding size factor is null then the widget will match its
/// child's size in that dimension. If a size factor is non-null then the
/// corresponding dimension of this widget will be the product of the child's
/// dimension and the size factor. For example if widthFactor is 2.0 then
/// the width of this widget will always be twice its child's width.
///
/// See also:
///
///  * [Align], which lets you arbitrarily position a child within itself,
///    rather than just centering it.
///  * [Row], a widget that displays its children in a horizontal array.
///  * [Column], a widget that displays its children in a vertical array.
///  * [Container], a convenience widget that combines common painting,
///    positioning, and sizing widgets.
///  * The [catalog of layout widgets](https://flutter.io/widgets/layout/).
class Center extends Align {
  /// Creates a widget that centers its child.
  const Center({ Key key, double widthFactor, double heightFactor, Widget child })
    : super(key: key, widthFactor: widthFactor, heightFactor: heightFactor, child: child);
}

因此 DartAnalyser 显示的错误是正确且符合预期的