dart

Flutter RenderIndexedStack object was given an infinite size during layout

由 你说的曾经没有我的故事 提交于 2021-02-20 14:58:53
问题 I am battling this DropDownItem box error, everything seems to work, but pops up the yellow out of bounds while it loads. Tried several things and can not get it resolved. I have this code for my Widget . @override Widget build(BuildContext context) { var _children = <Widget>[ !_createNew ? _referrerPractice() : _referrerCreate(), ]; return new Scaffold( appBar: new AppBar( title: new Text(widget.title), ), body: new Column( mainAxisSize: MainAxisSize.max, children: _children, )); } I then

Flutter RenderIndexedStack object was given an infinite size during layout

由 柔情痞子 提交于 2021-02-20 14:58:27
问题 I am battling this DropDownItem box error, everything seems to work, but pops up the yellow out of bounds while it loads. Tried several things and can not get it resolved. I have this code for my Widget . @override Widget build(BuildContext context) { var _children = <Widget>[ !_createNew ? _referrerPractice() : _referrerCreate(), ]; return new Scaffold( appBar: new AppBar( title: new Text(widget.title), ), body: new Column( mainAxisSize: MainAxisSize.max, children: _children, )); } I then

Flutter RenderIndexedStack object was given an infinite size during layout

由 [亡魂溺海] 提交于 2021-02-20 14:56:41
问题 I am battling this DropDownItem box error, everything seems to work, but pops up the yellow out of bounds while it loads. Tried several things and can not get it resolved. I have this code for my Widget . @override Widget build(BuildContext context) { var _children = <Widget>[ !_createNew ? _referrerPractice() : _referrerCreate(), ]; return new Scaffold( appBar: new AppBar( title: new Text(widget.title), ), body: new Column( mainAxisSize: MainAxisSize.max, children: _children, )); } I then

Flutter RenderIndexedStack object was given an infinite size during layout

由 怎甘沉沦 提交于 2021-02-20 14:53:42
问题 I am battling this DropDownItem box error, everything seems to work, but pops up the yellow out of bounds while it loads. Tried several things and can not get it resolved. I have this code for my Widget . @override Widget build(BuildContext context) { var _children = <Widget>[ !_createNew ? _referrerPractice() : _referrerCreate(), ]; return new Scaffold( appBar: new AppBar( title: new Text(widget.title), ), body: new Column( mainAxisSize: MainAxisSize.max, children: _children, )); } I then

flutter: 窗口初始与绘制流程

由 孤街浪徒 提交于 2021-02-20 05:55:09
环境: flutter sdk v1.7.8+hotfix.3 @stable 对应 flutter engine: 54ad777f 这里关注的是C++层面的绘制流程，平台怎样驱动和响应绘制与渲染的过程，并不是Dart部分的渲染。 结合之前的分析，在虚拟机实例的构造函数中调用了一个重要方法 DartUI::InitForGlobal() , 调用流程再罗列一下： DartVMRef::Create DartVMRef::DartVMRef DartVM::Create DartVMData::Create DartVM::DartVM DartUI::InitForGlobal() 实现体很明了，注册了各种类对象的方法，也就是说，这些在dart语言继承 NativeFieldWrapperClass2 的类都有一份在C++层的实现，也说明了DartSDK是如何提供接口绑定与C++层的实现，相当于java语言中的jni。 另外还有针对 Isolate 的初始化，不过只是设置了一个可以import的路径，并不重要： DartIsolate::CreateRootIsolate DartIsolate::CreateDartVMAndEmbedderObjectPair DartIsolate::LoadLibraries DartUI::InitForIsolate Dart

Multiple navigators in Flutter causes problem with pop

由 生来就可爱ヽ(ⅴ＜●) 提交于 2021-02-20 04:12:27
问题 I'm struggling in a Flutter situation with multiple navigators. Concept here is a page which triggers a modal with his own flow of multiple pages. Inside the modal everything is going swiftly (navigation pushes/pops are working), but if the modal is dismissed it removes every page of the lowest navigator. I've looked at the example of https://stackoverflow.com/a/51589338, but I'm probably missing something here. There's a wrapper Widget inside a page which is the root of the application.

Multiple navigators in Flutter causes problem with pop

由 ぃ、小莉子 提交于 2021-02-20 04:11:37
问题 I'm struggling in a Flutter situation with multiple navigators. Concept here is a page which triggers a modal with his own flow of multiple pages. Inside the modal everything is going swiftly (navigation pushes/pops are working), but if the modal is dismissed it removes every page of the lowest navigator. I've looked at the example of https://stackoverflow.com/a/51589338, but I'm probably missing something here. There's a wrapper Widget inside a page which is the root of the application.

Multiple navigators in Flutter causes problem with pop

由 徘徊边缘 提交于 2021-02-20 04:10:02
问题 I'm struggling in a Flutter situation with multiple navigators. Concept here is a page which triggers a modal with his own flow of multiple pages. Inside the modal everything is going swiftly (navigation pushes/pops are working), but if the modal is dismissed it removes every page of the lowest navigator. I've looked at the example of https://stackoverflow.com/a/51589338, but I'm probably missing something here. There's a wrapper Widget inside a page which is the root of the application.

Dart: How to implement a similar situation like “when hashcode() is overridden, ==() should also be overridden”?

由 ♀尐吖头ヾ 提交于 2021-02-20 04:08:19
问题 When either hashCode() or == operator is overridden in a class, the dart analyzer warns, saying that the other method should also be overridden. Can I implement a similar case on other methods? Or is this feature a special case provided by Dart Analyzer? For exmaple, class A { void method1() {} void method2() {} } class B extends A { @override void method1() {} } At this point I want to produce a warning that class B should also override method2(). Is that possible? 回答1: What you are seeing

Dart: How to implement a similar situation like “when hashcode() is overridden, ==() should also be overridden”?

由 混江龙づ霸主 提交于 2021-02-20 04:06:32
问题 When either hashCode() or == operator is overridden in a class, the dart analyzer warns, saying that the other method should also be overridden. Can I implement a similar case on other methods? Or is this feature a special case provided by Dart Analyzer? For exmaple, class A { void method1() {} void method2() {} } class B extends A { @override void method1() {} } At this point I want to produce a warning that class B should also override method2(). Is that possible? 回答1: What you are seeing
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