过滤ArrayCollection

filterFunction 属性是由ListCollectionView 类定义，它是ArrayCollection 的父类。当过滤器
函数被传递给继承自ListCollectionView 的任何子类后，这里为ArrayCollection 对象，应用
过滤器后必须调用refresh 方法：

 

 

 

import mx.collections.ArrayCollection;
private var coll:ArrayCollection;
private function init():void {
	coll = new ArrayCollection([{name:"Martin Foo", age:25},{name:"Joe Bar", age:15},{name:"John Baz", age:23},{name:"Matt Baz", age:21}]);
	coll.filterFunction = filterFunc;
	coll.refresh();
	for(var i:int = 0; i<coll.length; i++) {
		trace(coll.getItemAt(i).name);
	}
}
private function filterFunc(value:Object):Object {
	if(Number(value.age) > 21) {
		return true;
	}
	return false;
}