Vertical viewport was given unbounded height

 

 

可以通过指定shrinkWrap = true为了你ListView。

ListView(
  shrinkWrap: true,
  children...

这个办法我用了还是报错, 用下面的办法可以了,

put grid view inside Flexible or Expanded widget

?

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return new Material(     color: Colors.deepPurpleAccent,     child: new Column(         mainAxisAlignment: MainAxisAlignment.center,         children:<Widget>[          Flexible(           child:  GridView.count(crossAxisCount: _column,children: new List.generate(_row*_column, (index) {           return new Center(              child: new CellWidget(),           );         }),))]     ) );