Question

这是我的ArrayCollection我想从这个arrayCollection中删除“Label：”Taxes“，Value：2000”行。伙计们如何在不使用forloops或使用forloop的情况下做到这一点？

public var expenses:ArrayCollection = new ArrayCollection([
            {Label:"Taxes", Value:2000},
            {Label:"Rent", Value:1000},
            {Label:"Bills", Value:100},
            {Label:"Car", Value:450},
            {Label:"Gas", Value:100},
            {Label:"Food", Value:200}
        ]);

Answer 1

为此，您需要知道项目索引。所以expenses.removeItemAt(0)会对你有用。如果您有对象但不知道索引，则可以使用expenses.getItemIndex(myObject)获取它，然后将其删除。

Answer 2

            public var expenses:ArrayCollection = new ArrayCollection([
            {Label:"Taxes", Value:2000},
            {Label:"Rent", Value:1000},
            {Label:"Bills", Value:100},
            {Label:"Car", Value:450},
            {Label:"Gas", Value:100},
            {Label:"Food", Value:200}
        ]);


            var tempArr:ArrayCollection = new ArrayCollection(); // temporary ArrayCollection

            tempArr = ObjectUtil.copy(expenses) as ArrayCollection; //copy expences ArrayCollecttion to temp arrray before delete items

            for(var i:int=0;i<expenses.length;i++)
            {
                if(expenses[i].Label.toString()==label)
                {
                    tempArr.removeItemAt(i);
                }
            }

Answer 3

//使用＆＃34删除对象;删除＆＃34;方法如下：

trace("Remove First Item: "+ expenses.removeItemAt(0));

//使用循环删除对象如下：

var indetToDelete:Object = expenses[expenses.length - expenses.length];

for(var item:int=0; item<expenses.length ; item++){
                trace("Label:"+expenses[item].Label+"Value:"+expenses[item].Value);

if((expenses[item].Label == indetToDelete.Label) && (expenses[item].Value ==  indetToDelete.Value)){

expenses.removeItemAt(item);
}

}

希望这可以帮助你。

如何从flex中的ArrayCollection中删除项目？

3 个答案: