Stack
Image and others
Form
Row or Flex or Whatever:
+------------------------------+ +------------------------------+
| Text Text TextFormField | | Text Text TextFormField |
+------------------------------+ +------------------------------+
내 코드 (눈물) : 모두 같은) 다른 데이터를해야합니다 중요 : TextFormField를 추가 할 때 예외가 발생합니다.
@Override 위젯 빌드 (BuildContext 컨텍스트) {가능하면이를 넣을 수 있습니다 방법
// Composed Widget
Widget boxText = new Container(
decoration: new BoxDecoration(
border: new Border.all(
color: Colors.cyan[100],
width: 3.0,
style: BorderStyle.solid,
),
),
margin: new EdgeInsets.all(5.0),
padding: new EdgeInsets.all(8.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Text(
'Text',
style: null,
),
new Text(
'Text',
style: null,
),
new TextFormField(
decoration: const InputDecoration(
hintText: '',
labelText: 'label',
),
obscureText: true,
),
],
),
);
return new Scaffold(
key: _scaffoldKey,
body: new Stack(
alignment: AlignmentDirectional.topStart,
textDirection: TextDirection.ltr,
fit: StackFit.loose,
overflow: Overflow.clip,
children: <Widget>[
new Container(
color: Colors.red[200],
margin: new EdgeInsets.only(
left: MediaQuery.of(context).size.width * 0.05,
right: MediaQuery.of(context).size.width * 0.05,
top: MediaQuery.of(context).size.height * 0.4,
bottom: MediaQuery.of(context).size.height * 0.1,
),
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: new Form(
key: _formKey,
child: new ListView(
padding: const EdgeInsets.symmetric(horizontal: 16.0),
children: <Widget>[
new Flex(
direction: Axis.horizontal,
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
boxText,
boxText,
],
),
],
),
),
),
],
),
);
}
이
══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════ The following assertion was thrown during performLayout(): RenderFlex children have non-zero flex but incoming width constraints are unbounded. When a row is in a parent that does not provide a finite width constraint, for example if it is in a horizontal scrollable, it will try to shrink-wrap its children along the horizontal axis. Setting a flex on a child (e.g. using Expanded) indicates that the child is to expand to fill the remaining space in the horizontal direction. These two directives are mutually exclusive. If a parent is to shrink-wrap its child, the child cannot simultaneously expand to fit its parent. Consider setting mainAxisSize to MainAxisSize.min and using FlexFit.loose fits for the flexible children (using Flexible rather than Expanded). This will allow the flexible children to size themselves to less than the infinite remaining space they would otherwise be forced to take, and then will cause the RenderFlex to shrink-wrap the children rather than expanding to fit the maximum constraints provided by the parent. The affected RenderFlex is: RenderFlex#4db4f relayoutBoundary=up8 NEEDS-LAYOUT NEEDS-PAINT The creator information is set to: Row ← Padding ← DecoratedBox ← Padding ← Container ← Flex ← RepaintBoundary-[<0>] ← NotificationListener ← KeepAlive ← AutomaticKeepAlive ← SliverList ← SliverPadding ← ⋯ The nearest ancestor providing an unbounded width constraint is: RenderFlex#31897 relayoutBoundary=up4 NEEDS-LAYOUT NEEDS-PAINT creator: Flex ← RepaintBoundary-[<0>] ← NotificationListener ← KeepAlive ← AutomaticKeepAlive ← SliverList ← SliverPadding ← Viewport ← _ScrollableScope ← IgnorePointer-[GlobalKey#d9a15] ← Listener ← _GestureSemantics ← ⋯ parentData: (can use size) constraints: BoxConstraints(w=889.6, 0.0<=h<=Infinity) size: MISSING direction: horizontal mainAxisAlignment: start mainAxisSize: max crossAxisAlignment: center textDirection: ltr verticalDirection: downSee also: https://flutter.io/layout/ If this message did not help you determine the problem, consider using debugDumpRenderTree(): https://flutter.io/debugging/#rendering-layer http://docs.flutter.io/flutter/rendering/debugDumpRenderTree.html If none of the above helps enough to fix this problem, please don't hesitate to file a bug: https://github.com/flutter/flutter/issues/new When the exception was thrown, this was the stack: #0
RenderFlex.performLayout. (package:flutter/src/rendering/flex.dart:690:11) #1
RenderFlex.performLayout (package:flutter/src/rendering/flex.dart:711:10) #2
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #3 RenderPadding.performLayout (package:flutter/src/rendering/shifted_box.dart:197:11) #4
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #5
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #6
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #7 RenderPadding.performLayout (package:flutter/src/rendering/shifted_box.dart:197:11) #8
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #9 RenderFlex.performLayout (package:flutter/src/rendering/flex.dart:737:15) #10
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #11
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #12
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #13 RenderSliverList.performLayout (package:flutter/src/rendering/sliver_list.dart:164:27) #14
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #15 RenderSliverPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:182:11) #16
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #17 RenderViewportBase.layoutChildSequence (package:flutter/src/rendering/viewport.dart:286:13) #18
RenderViewport._attemptLayout (package:flutter/src/rendering/viewport.dart:979:12) #19
RenderViewport.performLayout (package:flutter/src/rendering/viewport.dart:903:20) #20
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #21
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #22
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #23
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #24
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #25
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #26
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #27
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #28
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #29 RenderConstrainedBox.performLayout (package:flutter/src/rendering/proxy_box.dart:257:13) #30
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #31 RenderPadding.performLayout (package:flutter/src/rendering/shifted_box.dart:197:11) #32
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #33 RenderStack.performLayout (package:flutter/src/rendering/stack.dart:466:15) #34
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #35 MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:124:11) #36
_ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:91:7) #37
MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:194:7) #38
RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:338:14) #39
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #40
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #41
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #42
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #43
_RenderCustomClip.performLayout (package:flutter/src/rendering/proxy_box.dart:1005:24) #44
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #45
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #46
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #47 RenderStack.performLayout (package:flutter/src/rendering/stack.dart:466:15) #48
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #49
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #50
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #51
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #52
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #53
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #54
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #55
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #56
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #57
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #58
RenderOffstage.performLayout (package:flutter/src/rendering/proxy_box.dart:2749:26) #59
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #60
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #61
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #62 RenderStack.performLayout (package:flutter/src/rendering/stack.dart:466:15) #63
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #64
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #65
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #66
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #67
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #68
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #69
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #70
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #71
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #72
RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:107:13) #73
RenderObject.layout (package:flutter/src/rendering/object.dart:1969:7) #74 RenderView.performLayout (package:flutter/src/rendering/view.dart:142:13) #75
RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:1844:7) #76
PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1133:18) #77
BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:262:19) #78
BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:581:22) #79
BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:200:5) #80
BindingBase&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:713:15) #81
BindingBase&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:649:9) #82
BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding.scheduleWarmUpFrame. (package:flutter/src/rendering/binding.dart:286:20) #84
_Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:367) #85
_Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:401) #86
_RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:163) The following RenderObject was being processed when the exception was fired: RenderFlex#4db4f relayoutBoundary=up8 NEEDS-LAYOUT NEEDS-PAINT creator: Row ← Padding ← DecoratedBox ← Padding ← Container ← Flex ← RepaintBoundary-[<0>] ← NotificationListener ← KeepAlive ← AutomaticKeepAlive ← SliverList ← SliverPadding ← ⋯ parentData: offset=Offset(0.0, 0.0) (can use size) constraints: BoxConstraints(unconstrained) size: MISSING direction: horizontal mainAxisAlignment: start mainAxisSize: max crossAxisAlignment: start textDirection: ltr verticalDirection: down This RenderObject had the following descendants (showing up to depth 5): RenderParagraph#ef986 NEEDS-LAYOUT NEEDS-PAINT RenderConstrainedBox#4a834 NEEDS-LAYOUT NEEDS-PAINT RenderSemanticsGestureHandler#272e2 NEEDS-LAYOUT NEEDS-PAINT RenderPointerListener#38266 NEEDS-LAYOUT NEEDS-PAINT RenderConstrainedBox#5ca9f NEEDS-LAYOUT NEEDS-PAINT RenderStack#7c271 NEEDS-LAYOUT NEEDS-PAINT RenderTransform#bf3b4 NEEDS-LAYOUT NEEDS-PAINT RenderOpacity#98951 NEEDS-LAYOUT NEEDS-PAINT RenderPadding#78af4 NEEDS-LAYOUT NEEDS-PAINT ════════════════════════════════════════════════════════════════════════════════════════════════════ Another exception was thrown: 'package:flutter/src/rendering/box.dart': Failed assertion: line 1433 pos 12: 'hasSize': is not true. Another exception was thrown: 'package:flutter/src/rendering/box.dart': Failed assertion: line 1433 pos 12: 'hasSize': is not true. Another exception was thrown: 'package:flutter/src/rendering/box.dart': Failed assertion: line 1433 pos 12: 'hasSize': is not true. Another exception was thrown: 'package:flutter/src/rendering/box.dart': Failed assertion: line 1433 pos 12: 'hasSize': is not true. Another exception was thrown: 'package:flutter/src/rendering/sliver_multi_box_adaptor.dart': Failed assertion: line 458 pos 12: 'child.hasSize': is not true. Another exception was thrown: NoSuchMethodError: The getter 'scrollExtent' was called on null. Another exception was thrown: NoSuchMethodError: The method 'debugAssertIsValid' was called on null. Another exception was thrown: NoSuchMethodError: The getter 'visible' was called on null. Another exception was thrown: NoSuchMethodError: The getter 'paintExtent' was called on null.
감사합니다 LIBRARY 렌더링에 의해 체포 예외없이 작동하는 위젯.
