Flex中动态绑定BindingUtils.bindProperty

关键字：BindingUtils.bindProperty

需导入：import mx.binding.utils.BindingUtils;

/**
    * 动态绑定
    * @params site:Object 被绑定对象
    * @params prop:String 被绑定对象的属性,如textInput的text属性
    * @params host:Object 监视者对象
    * @params chain:Object 监视者对象的属性
    * @return ChangeWatcher
    * **/

BindingUtils.bindProperty(site:Object,prop:String,host:Object,chain:Object)；

 

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init();"> <mx:Script> <!--[CDATA[ import mx.binding.utils.BindingUtils; import mx.binding.utils.ChangeWatcher; private var watcher1:ChangeWatcher; private var watcher2:ChangeWatcher; /** * 动态绑定 * @return void * **/ private function Binding():void { //绑定ID为txt2的txtInput //绑定属性为txtInput的text //监视者ID为txt1的txtInput //监视者属性为txtInput的text watcher1 = BindingUtils.bindProperty(txt2,"text",txt1,"text"); //绑定ID为txtComb的txtInput //绑定属性为txtInput的text //监视者ID为comb的ComboBox //监视者属性为ComboBox的value watcher2 = BindingUtils.bindProperty(txtComb,"text",comb,"value"); } /** * 解除绑定 * @return void * **/ private function UnBinding():void { //解除绑定 watcher1.unwatch(); watcher2.unwatch(); } ]]--> </mx:Script> <mx:ApplicationControlBar dock="true"> <mx:Button label="动态绑定" click="Binding();"/> <mx:Button label="解除绑定" click="UnBinding();"/> </mx:ApplicationControlBar> <mx:VBox width="200" height="200"> <mx:Spacer height="30"/> <mx:TextInput id="txt1"/> <mx:TextInput id="txt2"/> <mx:Spacer height="30"/> <mx:ComboBox id="comb"> <mx:dataProvider> <mx:Array> <mx:String>Beijing</mx:String> <mx:String>Shanghai</mx:String> <mx:String>Hangzhou</mx:String> </mx:Array> </mx:dataProvider> </mx:ComboBox> <mx:TextInput id="txtComb"/> </mx:VBox> </mx:Application>