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What are the common problems in the process of Flex development

2025-01-19 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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这篇文章主要介绍Flex开发过程中常见问题有哪些,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!

Flex组件开发总结

在平时的Flex开发过程中遇到的问题以及解决办法总结如下:

1.Flex开发过程中如何监听键盘事件?

代码说明:有两种类型的键盘事件:KeyboardEvent.KEY_DOWN和KeyboardEvent.KEY_UP

以上是监听的是回车事件

要是想监听组合键,例如:Ctrl+Enter键,代码如下:

if(evt.keyCode==13&&evt.ctrlKey){ }

2.Flex开发过程中怎么控制RichTextEditor的控制栏?

利用showControlBar属性,控制RichTextEditor的控制栏,这样把整个控制栏都关闭了

要是想分别控制控制栏中各寄宿控件,可以参考如下代码:

this.textEditor.alignButtons.height=0; this.textEditor.alignButtons.visible=false; this.textEditor.bulletButton.height=0; this.textEditor.bulletButton.visible=false; this.textEditor.linkTextInput.height=0; this.textEditor.linkTextInput.visible=false; this.textEditor._RichTextEditor_VRule1.height=0; this.textEditor._RichTextEditor_VRule1.visible=false; this.textEditor._RichTextEditor_VRule2.height=0; this.textEditor._RichTextEditor_VRule2.visible=false;

3.Flex开发过程中控件双击事件(DoubleClickEvent)怎么没反应?

privatefunctiondoubleClickHandler(evt:MouseEvent):void { Alert.show("doubleClick"); }

代码说明:

doubleClickEnabled属性:指定对象是否接收doubleClick事件。默认值为false,这意味着在默认情况下,不接收doubleClick事件。如果将doubleClickEnabled属性设置为true,实例在其范围内接收doubleClick事件

4.Flex开发过程中怎么在TextArea的光标位置插入字符?

privatefunctioninsertString(insertStr:String):void { if(this.textEditor.selectionBeginIndex==this.textEditor. selectionEndIndex) { varstartPart:String=this.textEditor.text.substring(0,this.textEditor.selectionBeginIndex); varendPart:String=this.textEditor.text.substring(this.textEditor.selectionEndIndex,this.textEditor.text. length); startPart+=insertStr; startPart+=endPart; this.textEditor.text=startPart; } else { this.textEditor.text=insertStr; } }

5.Flex开发过程中实现TextArea控件的滚动条始终保持在最下面?

代码说明:这段代码是为了实现TextArea控件的滚动条始终保持在最下面,以方便用户查看聊天信息

要是VBox控件需要实现类似效果,可以看如下代码:

privatefunctionupdateCompleteHandler(evt:FlexEvent):void { thisthis.vd.verticalScrollPosition=this.vd. maxVerticalScrollPosition; } this.txt_content.addEventListener(FlexEvent.VALUE_COMMIT,VALUE_COMMITHandler); privatefunctionVALUE_COMMITHandler(evt:FlexEvent):void{ txt_contenttxt_content.verticalScrollPosition=txt_content. maxVerticalScrollPosition; }以上是"Flex开发过程中常见问题有哪些"这篇文章的所有内容,感谢各位的阅读!希望分享的内容对大家有帮助,更多相关知识,欢迎关注行业资讯频道!

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