我遇到了一个渲染异常,我不知道如何修复.我正在try 创建一个包含3行的列.
行[图像]
行[文本字段]
行[按钮]
以下是我构建容器的代码:
Container buildEnterAppContainer(BuildContext context) {
var container = new Container(
padding: const EdgeInsets.all(8.0),
child: new Column(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
buildImageRow(context),
buildAppEntryRow(context),
buildButtonRow(context)
],
),
);
return container;
}
还有我的文本容器的buildAppEntryRow代码
Widget buildAppEntryRow(BuildContext context) {
return new Row(
children: <Widget>[
new TextField(
decoration: const InputDecoration(helperText: "Enter App ID"),
style: Theme.of(context).textTheme.body1,
)
],
);
}
当我运行时,我得到以下异常:
I/flutter ( 7674): BoxConstraints forces an infinite width.
I/flutter ( 7674): These invalid constraints were provided to RenderStack's layout() function by the following
I/flutter ( 7674): function, which probably computed the invalid constraints in question:
I/flutter ( 7674): RenderConstrainedBox.performLayout (package:flutter/src/rendering/proxy_box.dart:256:13)
I/flutter ( 7674): The offending constraints were:
I/flutter ( 7674): BoxConstraints(w=Infinity, 0.0<=h<=Infinity)
如果我将buildAppEntryRow改为只是一个TextField,如下所示
Widget buildAppEntryRow2(BuildContext context) {
return new TextField(
decoration: const InputDecoration(helperText: "Enter App ID"),
style: Theme.of(context).textTheme.body1,
);
}
我不再得到例外.我在Row实现中遗漏了什么,导致它无法计算该行的大小?