使用RKValueTransFormer将NSArray转换为RLMArray无法将outputValue转换为AutoreleasingUnsafeMutablePointer <anyobject?> </anyobject?>

时间:2014-12-04 19:58:42

标签: swift restkit restkit-0.20 realm

我一起使用RestKit和realm.io。我有一个值数组(数组是url图片的字符串)以JSON格式返回,应该成为RLMArray RLMObject的{​​{1}}。我相信映射设置正确,因为它尝试将结果转换为RLMArray。但我从RestKit得到以下错误:

restkit.object_mapping:RKMappingOperation.m:449 Failed transformation of value at keyPath 'picList' to representation of type 'RLMArray': Error Domain=org.restkit.RKValueTransformers.ErrorDomain Code=3002 "Failed transformation of value '(
"Picture {\n\turl = ;\n\tremote_url = http://placekitten.com/g/500/500;\n}",
"Picture {\n\turl = ;\n\tremote_url = http://placekitten.com/g/400/400;\n}",
"Picture {\n\turl = ;\n\tremote_url = http://placekitten.com/g/300/300;\n}"
)' to RLMArray: none of the 2 value transformers consulted were successful."

所以我创建了一个值变换器来手动执行转换。这是我的代码:

func setupValueTransformerForPicList(){

    println("called value transformer function")
    var picListValueTransformer = RKBlockValueTransformer(validationBlock: { (inputClass:AnyClass!,outputClass:AnyClass!) -> Bool in

        if (inputClass.className() == "Array" || inputClass.className() == "__NSArrayM") && outputClass.className() == "RLMArray" {
            return true
        }
        return false

        }) { (inputValue:AnyObject!, var outputValue, outputClass, error) -> Bool in

            println("called value transformer")
            if let thisArray:NSArray = inputValue as? NSArray{
                var picRlmArray:RLMArray = RLMArray(objectClassName: Picture.className())
                for item in thisArray {
                    if let thisPicture:Picture = item as? Picture{
                        picRlmArray.addObject(thisPicture)
                    } else {
                        return false

                    }
                }
                outputValue = picRlmArray // this is the line that throws the error
                return true
            }
            return false
    }
    RKValueTransformer.defaultValueTransformer().addValueTransformer(picListValueTransformer)
}

但是,我收到错误消息:

'RLMArray' is not convertible to 'AutoreleasingUnsafeMutablePointer<AnyObject?>'

我尝试过向下转发

 outputValue = picRlmArray as AutoreleasingUnsafeMutablePointer<AnyObject?>

具有相同的结果。我已经尝试过这样做(如果它甚至是一件事)

outputValue = picRlmArray as AutoreleasingUnsafeMutablePointer<RLMArray?>

并获得错误

'RLMArray' is not identical to 'AnyObject'

我在这里有点不太深入,但我觉得这绝对是可以实现的。任何帮助将不胜感激。谢谢!

修改

我也无法从此函数返回swift数组。它给出了同样的错误。我认为这可能是一个更普遍的问题,关于如何返回不是AnyObject s。

的类型

1 个答案:

答案 0 :(得分:4)

I&#39; M RestKit的当前维护者,和I&#39; M悲伤地说,我的天堂&#39;吨有多少机会使用RestKit与境界在一起,特别是不与夫特玩弄的。

我将查看可能导致此错误的原因。

编辑:

在我看来,做outputValue.memory = picRlmArray而不是outputValue = picRlmArray就行了!