优化网站排名方法,做的很不好的网站,广州一站式网站建设,jeecms可以做网站卖吗1.让界面之间可以嵌套且执行动画。
2.界面的添加遵循先进后出原则。
3.需要使用AnimateView#xff0c;请看我上一篇博客。
演示#xff1a; 代码#xff1a;
Stack:
import package:flutter/cupertino.dart;///栈#xff0c;先进后出
class KqWidgetStack {final Lis…1.让界面之间可以嵌套且执行动画。
2.界面的添加遵循先进后出原则。
3.需要使用AnimateView请看我上一篇博客。
演示 代码
Stack:
import package:flutter/cupertino.dart;///栈先进后出
class KqWidgetStack {final ListWidget _stack [];///入栈push(Widget obj) {_stack.add(obj);}///出栈Widget? pop() {if (_stack.isEmpty) {return null;} else {return _stack.removeLast();}}///栈长度length() {return _stack.length;}///清除栈clear() {_stack.clear();}
}StackView:
import package:flutter/cupertino.dart;
import package:kq_flutter_widgets/widgets/animate/animate_view.dart;
import package:kq_flutter_widgets/widgets/stackview/stack.dart;class StackView extends StatefulWidget {///初始显示的界面final Widget initChild;///state回调。获取state后方便后续界面操作。final void Function(StackViewState state)? stateCallback;const StackView({super.key,required this.initChild,this.stateCallback,});overrideStateStatefulWidget createState() StackViewState();
}class StackViewState extends StateStackView {final KqWidgetStack _stack KqWidgetStack();bool _isOpen true;Widget? _previousWidget;Widget? _currentWidget;overridevoid initState() {super.initState();_currentWidget widget.initChild;widget.stateCallback?.call(this);}overrideWidget build(BuildContext context) {if (_currentWidget null) {return Container();} else if (_previousWidget null) {return _isOpen? AnimateView(animate: TranslationAnimate(angle: TranslationAnimateDirection.bottomToTop.angle,type: TranslationAnimateType.translateIn),child: _currentWidget!,): AnimateView(animate: TranslationAnimate(angle: TranslationAnimateDirection.topToBottom.angle,type: TranslationAnimateType.translateOut),child: _currentWidget!,);} else {return _isOpen? Stack(children: [AnimateView(animate: TranslationAnimate(angle: TranslationAnimateDirection.bottomToTop.angle,type: TranslationAnimateType.translateOut),isNeedFlashEveryTime: true,child: _previousWidget!,),AnimateView(animate: TranslationAnimate(angle: TranslationAnimateDirection.bottomToTop.angle,type: TranslationAnimateType.translateIn),isNeedFlashEveryTime: true,child: _currentWidget!,),],): Stack(children: [AnimateView(animate: TranslationAnimate(angle: TranslationAnimateDirection.topToBottom.angle,type: TranslationAnimateType.translateOut),isNeedFlashEveryTime: true,child: _previousWidget!,),AnimateView(animate: TranslationAnimate(angle: TranslationAnimateDirection.topToBottom.angle,type: TranslationAnimateType.translateIn),isNeedFlashEveryTime: true,child: _currentWidget!,),],);}}addWidget(Widget page) {_isOpen true;_previousWidget _currentWidget;_currentWidget page;if (_previousWidget ! null) {_stack.push(_previousWidget!);}print(stack size${_stack.length()});setState(() {});}///回退返回上一个界面。///[bool] 返回true表示成功返回上一级///返回false表示返回失败已是最后一个界面不可继续返回。bool back() {_isOpen false;_previousWidget _currentWidget;_currentWidget _stack.pop();print(stack size${_stack.length()});setState(() {});if (_stack.length() 1) {return true;} else {return false;}}overridevoid dispose() {super.dispose();_stack.clear();}
}demo:
import package:flutter/material.dart;
import package:get/get.dart;
import package:kq_flutter_widgets/widgets/button/kq_small_button.dart;
import package:kq_flutter_widgets/widgets/stackview/stack_view.dart;
import package:kq_flutter_widgets/widgets/titleBar/kq_title_bar.dart;class StackViewDemo extends StatefulWidget {const StackViewDemo({super.key});overrideStateStatefulWidget createState() StackViewDemoState();
}class StackViewDemoState extends StateStackViewDemo {StackViewState? state;overrideWidget build(BuildContext context) {return Scaffold(appBar: KqHeadBar(headTitle: StackView演示,back: () {Get.back();},),body: StackView(initChild: Column(children: [const Text(我是首页),KqSmallButton(title: 打开新页面,onTap: (disabled) {state?.addWidget(TestPage1(state: state!));},),Expanded(child: Container(color: Colors.purple,)),],),stateCallback: (StackViewState state) {this.state state;},),);}
}class TestPage1 extends StatelessWidget {final StackViewState state;const TestPage1({super.key, required this.state});overrideWidget build(BuildContext context) {return Column(children: [const Text(我是TestPage1),KqSmallButton(title: 返回,onTap: (disabled) {state.back();},),KqSmallButton(title: 打开新页面,onTap: (disabled) {state.addWidget(TestPage2(state: state));},),Expanded(child: Container(color: Colors.amber,)),],);}
}class TestPage2 extends StatelessWidget {final StackViewState state;const TestPage2({super.key, required this.state});overrideWidget build(BuildContext context) {return Column(children: [const Text(我是TestPage2),KqSmallButton(title: 返回,onTap: (disabled) {state.back();},),KqSmallButton(title: 打开新页面,onTap: (disabled) {state.addWidget(TestPage3(state: state));},),Expanded(child: Container(color: Colors.cyan,)),],);}
}class TestPage3 extends StatelessWidget {final StackViewState state;const TestPage3({super.key, required this.state});overrideWidget build(BuildContext context) {return Column(children: [const Text(我是TestPage3),KqSmallButton(title: 返回,onTap: (disabled) {state.back();},),Expanded(child: Container(color: Colors.blueAccent,)),],);}
}
