考虑到字符串中的对象存在,我正在尝试将以下字符串转换为对象:
var exampleStr:String = "myObject.property1.property2";
var exampleObj:Object = exampleStr as Object;
我将如何实现这一目标,您是否可以提供替代方法?
您可以使用如下简单函数:
function getRValue(target:Object, chain:String):*
{
for each(var i:String in chain.split("."))
{
if(target.hasOwnProperty(i)) target = target[i];
else
{
// Couldn't find property.
throw new Error("Property " + i + " does not exist.");
}
}
return target;
}
通过测试:
var myObject:Object = {
property1: {
property2: "Hello world!"
}
};
trace( getRValue(this, "myObject.property1.property2") ); // Hello world!
trace( getRValue(myObject, "property1.property2") ); // Hello world!
我假设您正在尝试从组装的字符串动态创建对象?如果是这样,我认为您正在寻找的是:
var exampleObj:Object = this[ "myObject.property1.property2" ];
这假定 myObject 的作用域是 "this",属性 2 也是一个 Object。
//Convert the string to a property array
var t:Array = exampleStr.split(".");
var exampleObj:Object = null;
if (t.length > 0)
{
var objName:String = t[i];
//get the object in the class
exampleObj = this[objName];
for (var i:int = 1; i < t.length; i++)
{
var propertyName:String = t[i];
if (exampleObj.hasOwnProperty(propertyName))
{
exampleObj = exampleObj[propertyName];
}
else
{
break;
}
}
}