灵活移动TabbedViewNavigatorApplication后退按钮

问题描述

限时删除！！

为什么 TabbedViewNavigatorApplication 没有popView（）（如 ViewNavigatorApplication 我可以使用popView去前视图）？

如何在 TabbedViewNavigatorApplication 中执行此操作？

 < fx：Script> 
<！[CDATA [
 protected function BackBtn（event：MouseEvent）：void {
 navigator.popView（）; //错误
} 
]]> 
< / fx：Script> 
 
 < s：titleContent> 
< s：Button label =Backclick =BackBtn（event）/> 
< / s：titleContent> 
< / s：ViewNavigator> 
 < / s：TabbedViewNavigatorApplication> 
  

谢谢。

解决方案

 <？xml version =1.0encoding =utf-8？> 
  xmlns：fx =http://ns.adobe.com/mxml/2009
 xmlns：s =library ：//ns.adobe.com/flex/spark> 
< fx：Script> 
<！[CDATA [
 import mx.events.FlexEvent; 
 
导入spark.events.IndexChangeEvent; 
 
 private var tabHistory：Array; 
 private var isLoadingFromHistory：Boolean; 
 $ b保护函数BackBtn（event：MouseEvent）：void 
 {
 isLoadingFromHistory = true; 
 if（tabHistory.length == 0）
 {
 trace（你不能再回头了）; 
 tabHistory.push（0）; 
} 
 tabbedNavigator.selectedIndex = tabHistory.pop（）; 
 
 
保护函数tabbedviewnavigatorapplication1_creationCompleteHandler（event：FlexEvent）：void 
 {
 tabHistory = []; 
 tabbedNavigator.addEventListener（IndexChangeEvent.CHANGE，tabsChangedHandler）; 
 
 $ b private function tabsChangedHandler（event：IndexChangeEvent）：void 
 {
 if（isLoadingFromHistory）
 {
 isLoadingFromHistory = false; 
 return; 
} 
 tabHistory.push（event.oldIndex）; 
 trace（tabHistory）; 
} 
]]> 
< / fx：Script> 
 
  height =100％
 label =Page1
 width =100％> ; 
< s：titleContent> 
  label =Back/> 
< / s：titleContent> 
< / s：ViewNavigator> 
  height =100％
 label =Page2
 width =100％> 
< s：titleContent> 
  label =Back/> 
< / s：titleContent> 
< / s：ViewNavigator> 
< / s：TabbedViewNavigatorApplication> 
  

Why TabbedViewNavigatorApplication don’t have popView() (as in ViewNavigatorApplication I can use popView to go previous view)?

How can I do that in TabbedViewNavigatorApplication?

    <fx:Script>
    <![CDATA[
      protected function BackBtn(event:MouseEvent):void{
        navigator.popView(); //error
      }
    ]]>
  </fx:Script>

<s:ViewNavigator label="Page1" width="100%" height="100%" firstView="views.DurationView" >
    <s:titleContent>
      <s:Button label="Back" click="BackBtn(event)"/>
    </s:titleContent>
  </s:ViewNavigator>
<s:ViewNavigator label="Page2" width="100%" height="100%" firstView="views.FrequencyView"/>
</s:TabbedViewNavigatorApplication>

thanks.

解决方案

<?xml version="1.0" encoding="utf-8"?>
<s:TabbedViewNavigatorApplication creationComplete="tabbedviewnavigatorapplication1_creationCompleteHandler(event)"
                                  xmlns:fx="http://ns.adobe.com/mxml/2009"
                                  xmlns:s="library://ns.adobe.com/flex/spark">
    <fx:Script>
        <![CDATA[
            import mx.events.FlexEvent;

            import spark.events.IndexChangeEvent;

            private var tabHistory : Array;
            private var isLoadingFromHistory : Boolean;

            protected function BackBtn(event : MouseEvent) : void
            {
                isLoadingFromHistory = true;
                if (tabHistory.length == 0)
                {
                    trace("You can't go back any further");
                    tabHistory.push(0);
                }
                tabbedNavigator.selectedIndex = tabHistory.pop();
            }

            protected function tabbedviewnavigatorapplication1_creationCompleteHandler(event : FlexEvent) : void
            {
                tabHistory = [];
                tabbedNavigator.addEventListener(IndexChangeEvent.CHANGE, tabsChangedHandler);
            }

            private function tabsChangedHandler(event : IndexChangeEvent) : void
            {
                if (isLoadingFromHistory)
                {
                    isLoadingFromHistory = false;
                    return;
                }
                tabHistory.push(event.oldIndex);
                trace(tabHistory);
            }
        ]]>
    </fx:Script>

    <s:ViewNavigator firstView="views.WhosAtTheDoorHomeView"
                     height="100%"
                     label="Page1"
                     width="100%">
        <s:titleContent>
            <s:Button click="BackBtn(event)"
                      label="Back"/>
        </s:titleContent>
    </s:ViewNavigator>
    <s:ViewNavigator firstView="views.WhosAtTheDoorHomeViewCopy"
                     height="100%"
                     label="Page2"
                     width="100%">
        <s:titleContent>
            <s:Button click="BackBtn(event)"
                      label="Back"/>
        </s:titleContent>
    </s:ViewNavigator>
</s:TabbedViewNavigatorApplication>

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