我可以绑定一个Flex组件的属性为一个函数?绑定、组件、属性、一个函数

2023-09-08 12:26:52 作者:理想七旬

我想将的启用的基于一个函数,有一个或多个参数的返回值的按钮属性。我怎样才能做到这一点?

 私有函数isUserAllowed(用户名:布尔):布尔{
   如果(用户名=='汤姆')
      返回true;
   如果(用户名=='法案')
      返回false;
}

< MX:按钮标签=创建采购订单ID =createPOButton
启用=<我想打电话给isUserAllowed('法案')或isUserAllowed('汤姆')这里>中
点击=createPOButton_Click()/>
 

解决方案

 < MX:按钮
启用={this.myFunction(this.myVariable)}
>
 

或内嵌:

 < MX:按钮
启用={(功能(ARG:对象):布尔{...})(this.myVariable)}
>
 
组件属性

I want to set the enabled property on a button based on the return value of a function that has one or more parameters. How can I do this?

private function isUserAllowed (userName:Boolean):Boolean {
   if (userName == 'Tom')
      return true;
   if (userName == 'Bill')
      return false;
}

<mx:Button label="Create PO" id="createPOButton"
enabled="<I want to call isUserAllowed ('Bill') or isUserAllowed ('Tom') here>"
click="createPOButton_Click()" />

解决方案

<mx:Button
enabled = "{this.myFunction(this.myVariable)}"
>

or inline:

<mx:Button
enabled = "{(function(arg:Object):Boolean{ ... })(this.myVariable)}"
>