flutter - BoxConstraints 强制无限宽度

Question

在列中添加行时出现错误。我收到以下错误:

I/flutter ( 6449): ══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter ( 6449): The following assertion was thrown during performLayout():
I/flutter ( 6449): BoxConstraints forces an infinite width.
I/flutter ( 6449): These invalid constraints were provided to RenderAnimatedOpacity's layout() function 

我的代码也供引用:

return new Scaffold(
      backgroundColor: whiteColor,
      body: new Column(
        children: <Widget>[
          imgHeader,
          lblSignUp,
          txtEmail,
          Row(
            mainAxisAlignment: MainAxisAlignment.start,
            children: <Widget>[
              txtFirstName,
              txtLastName
            ],
          ),
        ],
      ),
    );

Answer 1

如果您在 Row 中使用 TextField，那么您需要使用 Flexible 或 Expanded。

此答案中提供了更多详细信息。

https://stackoverflow.com/a/45990477/4652688