PFObject Array Sort

Question

I'm using Parse and I have an array of PFObjects called "scorecardData". Each PFObject has a "score" property that is of type Int. I'm trying to sort my array by "score" but I'm getting the following error: "Binary operator '<' cannot be applied to two 'AnyObject?' operands". I'm not sure what I'm doing wrong here. I also tried down casting the objectForKey("score") as! Int but its not letting me do this. Any suggestions? Thanks in advance.

    var scorecardData = [PFObject]()

    scorecardData.sortInPlace({$0.objectForKey("score") < $1.objectForKey("score")})

zuziaka · Accepted Answer · 2015-11-22 21:09:08Z

2

You declared scorecardData variable as Array of PFObject. Why are you trying access PFObject property using objectForKey: reserved? Anyway I am not parse expert. But if you declared your array as [PFObject] you can use:

scorecardData.sortInPlace({$0.score < $1.score})

But this won't work unless you subclass PFObject for a more native object-oriented class structure. If you do that remember also to specify:

var scorecardData = [YOUR_NEW_CLASS]()

I strongly recommend subclassing PFObject to make use of all swift type-safe goodies.

But if you want to keep your data structure you can use:

scorecardData.sortInPlace({($0["score"] as! Int) < ($1["score"] as! Int)})

Keep in mind that it's dangerous, and in future avoid it.

answered Nov 22, 2015 at 21:09

zuziaka

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dcotter Over a year ago

Thanks zuziaka! Your solution worked. I'm still new at programming and will look into subclassing PFObject for this project to make my code better.

Waqas Ali · Accepted Answer · 2017-03-22 09:53:33Z

1

If you want to Sort your array of PFOject... You can do this

extension Array where Element:PFObject {
    func sort() -> [PFObject] {
        return sort { (first, second) -> Bool in
            let firstDate   = first.objectForKey("time") as! NSDate//objectForKey(Constants.Parse.Fields.User.fullName) as? String
            let secondDate  = second.objectForKey("time") as! NSDate//objectForKey(Constants.Parse.Fields.User.fullName) as? String
            return firstDate.compare(secondDate) == .OrderedAscending
        }
    }
}

answered Mar 22, 2017 at 9:53

Waqas Ali

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Comments

dannybess · Accepted Answer · 2015-11-22 21:59:29Z

0

Have you tried doing this?

var query = PFQuery(className:"ScoreCard")

    // Sorts the results in ascending order by the score field
query.orderByDescending("score")

query.findObjectsInBackgroundWithBlock {

answered Nov 22, 2015 at 21:59

dannybess

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