查询解析数组数据到本地数组，然后添加到TableView（Swift）

Question

Hi first i'd like to say (Thank you) in advance. I apologize as I feel like a huge idiot.

So I've successfully pulled an array of objectId's from parse and added it to a local array called [teamArray] See below:

func getTeamData() {
    var query = PFUser.query()
    query?.whereKey("objectId", equalTo: displayedTeamId)
          query!.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]?, error: NSError?) -> Void in
        if error == nil {
            // The find succeeded.
            println("Successfully retrieved \(self.displayedTeamId)")
            // Do something with the found objects
            if let objects = objects as? [PFObject] {
                for object in objects {
                    var team:AnyObject? = object["team"]
                    self.teamArray.addObjectsFromArray(team as! [PFObject])
        --> successful print here: println(" I have a full \(self.teamArray)")
                    // code to download an image
                    let imageFile = object["teamImage"] as! PFFile

                    imageFile.getDataInBackgroundWithBlock {

                        (imageData: NSData?, error: NSError?) -> Void in
                        if error != nil {
                            println(error)
                        } else {

                            if let data = imageData {
                                self.showTeamImage.image = UIImage(data: data)
                                self.tableView.reloadData()
                            }
                        }

                    }
                    self.tableView.reloadData()
                }
            }
        } else {
            // Log details of the failure
            println("Error: \(error!) \(error!.userInfo!)")
        }
    }
}

The team array is like so:

var teamArray:NSMutableArray = []

So, my goal is to take each object in the array, and add it into into the tableView cells.

I have no idea how to do this. I'll re-iterate.

1. I want to pull down the parse array which is an array of objectId's (as Strings)

2. I want to extract each ObjectId within the [teamArray], and add that object into it's own cell.

3. Pull the data out of that object.

   • profile photo
   • name
   • location
   • age
   • gender

Now how do I approach this???

Answer 1

This example that I am about to show you is for iOS 9 with the new parse SDK .

You want to display a lot of information in your TableViewCell, so create a model for example struct which contains all those informations.

struct PersonalInfo
{
    var profilePhoto:UIImage!
    var name:String!
    var location:CLLocationCoordinate2D!
    var age:Int!
    var gender:String!
}

• Put this structure outside of the ViewController class

Then instead of having an array of NSMutableArray array just create an var arrayOfData = [PersonalInfo]()

• Your query will now look like:

   func getTeamData() { var query = PFUser.query() query?.whereKey("objectId", equalTo: displayedTeamId) query?.findObjectsInBackgroundWithBlock({ (objects:[PFObject]?, error :NSError?) -> Void in if error == nil { if let objects = objects { for one in objects { let imageToRetreive = one["imageFromParse"] as! PFFile imageToRetreive.getDataInBackgroundWithBlock({ (data :NSData?, error:NSError?) -> Void in if error == nil { if let data = data { let finalImage = UIImage(data: data) let name = one["username"] as! String let gender = one["gender"] as! String let age = one["age"] as! Int let location = one["Location"] as! PFGeoPoint var Info = PersonalInfo() Info.name = name Info.gender = gender Info.age = age Info.profilePhoto = finalImage Info.location = CLLocationCoordinate2DMake(location.latitude, location.longitude) self.arrayOfData.append(Info) // <--- then reload the tableview } } }) } } } }) } 

  • Then in you cellForRowAtIndexPath method you will have something like: var data = arrayOfData[indexPath.row] cell.textLabel.text = data.name // <---- access everything from the array using the . method from data

Answer 2

The question needs a little more clarification. First of all, is object["team"] returning an array? or is it representing one single object? Another option going off on the answer above is to use PFSubclassing to represent your results as parse objects It could look something like this:

class Team: PFObject, PFSubclassing {
    @NSManaged var profilePhoto: PFFile?
    @NSManaged var name: String

    // The name of your class in parse
    static func parseClassName() -> String {
        return "Team"
      }

    override class func initialize() {
        struct Static {
          static var onceToken : dispatch_once_t = 0;
        }
        dispatch_once(&Static.onceToken) {
          self.registerSubclass()
        }
      }
}

This way you can perform all of the PFObject operations on your objects Eg.

let team = Team()
team.name = "Team name here"

let imageNamed = UIImage(named: "image.jpg")
let imageData = UIImageJPEGRepresentation(imageNamed, 1)
let imageFile = PFFile(data: imageData)
team.profileImage = imageFile
team.saveInBackground()