5. 测试修改后的代码 在修改代码后,确保在多个设备和屏幕上进行测试,以验证问题是否已解决,并且没有引入新的问题。 通过上述步骤,你应该能够定位并解决“flutter failed assertion: line 1972 pos 12: 'hassize'”错误。如果问题仍然存在,可能需要更详细地检查你的布局逻辑或提供更多的代码上下文来进一步分析。
报错:Failed assertion: line 1785 pos 12: 'hasSize' 原因:1. SingleChildScrollView 嵌套 ListView、GridView报错 ,SingleChildScrollView 和 ListView 都有滚动 属性physics 他们默认是都是可以滚动的 2. SingleChildScrollView 添加了Expanded或者Flexible 解决方法: 1. 增加shrinkWrap: true 和 physics: NeverScrollabl...
做Flutter项目的时候,引用Column套用ListView的时候,会报这样的异常 先看一下代码中的两个控件之间的套用关系 出现这个问题的原因是Column控件是纵向布局,而高度无限制。ListView控件呢,是可滑动控件,在滑动方向上也无高度限制。两个都无限制的控件相互嵌套,就会报出以上异常。 解决方法,在ListView的外层Padding外再添加...
Failed assertion: line 2165 pos 12: 'hasSize' Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause. In either case, please report this assertion by filing a ...
Failed assertion: line 1785 pos 12: 'hasSize' Column中已经添加了MainAxisSize.min属性,但还是报hasSize错误。 分析原因:根据ide的提示,垂直方向上给了一个无限大的高度,这个是因为子Widget是ListView,flutter中ListView在构建控件时会“询问”子组件所要求的空间,而ListView无法给出具体值,导致出错(粗略理解,后期分...
Failed assertion: line 1940 pos 12: 'hasSize' #76378 Closed iheb-harchi opened this issue Feb 19, 2021· 5 comments Commentsiheb-harchi commented Feb 19, 2021 • edited No description provided.Member TahaTesser commented Feb 19, 2021 Hi @iheb-harchi Can you please provide your ...
Failed assertion: line 1966 pos 12: 'hasSize' 1. 2. 3. 问题分析 如果你在Column中使用Expanded,而这个Column具有父级SingleChildScrollView就报这个错误 问题原因 因为当使用Column时,它会尝试处于屏幕高度,而当在内部使用Expanded时,该列会将剩余空间分配给扩展小部件的子级,现在,如果你使用SingleChildScrollView...
RenderBox was not laid out: RenderRepaintBoundary#d0a84 relayoutBoundary=up2 NEEDS-PAINT'package:flutter/src/rendering/box.dart':Failed assertion: line 1940 pos 12: 'hasSize' 意思是说,我们的ListView和GridView并没有一个明确的大小,Flutter不知道该如何在Column或Row中绘制它。
following assertion was thrown while dispatching notifications for FocusNode:flutter: RenderBox was not laid out: RenderEditable#766b0 NEEDS-LAYOUT NEEDS-PAINTflutter: 'package:flutter/src/rendering/box.dart':flutter: Failed assertion: line 1687 pos 12: 'hasSize'flutter:flutter: Either the assertion ...
'package:flutter/src/rendering/box.dart': Failed assertion: line 1702 pos 12: 'hasSize' 解决方法有两种: 用有高度的布局(如Container)将ListView包裹,然后指定可滚动高度 Container( height: 80, child: ListView.builder( itemBuilder: (context, position) { ...