我收到了一个渲染异常,我不知道如何解决。我正在尝试创建具有3行的列。
行[图片]
行[TextField]
行[按钮]
这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;
}
和文本容器的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,
)
],
);
}
运行时,出现以下异常:
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更改为仅TextField而不是这样
Widget buildAppEntryRow2(BuildContext context) {
return new TextField(
decoration: const InputDecoration(helperText: "Enter App ID"),
style: Theme.of(context).textTheme.body1,
);
}
我不再例外。行实现导致我无法计算该行的大小,我缺少什么?