Question

在PFObject的子类数组上调用indexOf时出现以下错误。

无法将“匹配”类型的值转换为预期的参数类型 '@noescape（AnyObject）抛出 - ＆gt;布尔“

我的班级：

class Match: PFObject, PFSubclassing {XXXX}

发生错误的方法：

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
    //dismiss the image picker
    self.dismissViewControllerAnimated(true) { () -> Void in
        //wait for the dismissal in case there is an error to show
        let recordedVideofileURL = info[UIImagePickerControllerMediaURL] as? NSURL

        if let recordedVideofileURL = recordedVideofileURL
        {
            //upload the file to S3
            do
            {
                let uploadRequest = try S3UploadManager.uploadFile(self.match!.localPathToVideo()!)

                self.match!.saveEventually({ (success: Bool, error: NSError?) -> Void in
                    if (success)
                    {
                        // The object has been saved.
                        self.matchesController.loadObjects()

                        //set up progress tracking for the upload
                        uploadRequest.uploadProgress = {[weak self](bytesSent:Int64, totalBytesSent:Int64, totalBytesExpectedToSend:Int64) -> Void  in
                            if let match = self?.match
                            {
      >>>>>>error here           var index = self?.matchesController.objects?.indexOf(match)
                            }
                        }
                    }

                })
            }
            catch
            {
                // TODO: handle error
            }
        }
    }
}

从我只读的内容来看，当数组中包含的对象不符合Equatable扩展时，会发生此错误。但是PFObject继承了符合该扩展的NSObject。所以我不知所措......

赞赏任何指针

Answer 1

找到解决方案。事实证明，PFQueryTableViewController上的objects方法返回[AnyObject]，所以我需要将它转换为[Match]

let objects = self?.matchesController.objects as! [PFObject]

然后它有效......

我还是swift和Parse的新手，但对于返回[AnyObject]的对象方法来说这似乎不对？特别是考虑到文档中的评论

/*!
 @abstract The array of instances of <PFObject> that is used as a data source.
 */
public var objects: [AnyObject]? { get }

PFObject子类获取“无法将类型'匹配'的值转换为预期的参数类型'@noescape（AnyObject）throws - ＆gt; Bool'”错误

1 个答案: