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Published 20 hours ago • verified publisher icon huobiapp

获取数据问题

Open yangxuy opened this issue 5 years ago • 1 comments

我打开你的案例demo直接报错The getter 'length' was called on null. 点进去是这个地方 Scrollbar( child: SingleChildScrollView( child: Container( width: bloc.rectWidth * data.length,(这里的length为null) ), controller: _controller, scrollDirection: Axis.horizontal, ))

yangxuy avatar Aug 01 '19 03:08 yangxuy

Scrollbar( child: SingleChildScrollView( child: Container( width: bloc.rectWidth * (data?.length ?? 0),(这里做一下这样的处理，就没有报错了) ), controller: _controller, scrollDirection: Axis.horizontal, ))

yangxuy avatar Aug 01 '19 04:08 yangxuy