Parse LiveQuery How do I uses Loadmore , limits - swift

Question

Hi I'm uses ParseLiveQuery and PFSubclassing in Swift 3
My question is limits is not working for me.
Here is my PFSubclassing
import Foundation
import Parse
class Post: PFObject, PFSubclassing {
#NSManaged var postBy: PFUser?
#NSManaged var postText: String?
#NSManaged var postImg: PFFile?
#NSManaged var sell: NSNumber?
#NSManaged var commentPointer: PFObject?
#NSManaged var commentBy: PFUser?
#NSManaged var comment: String?
#NSManaged var likeCount: NSNumber?
#NSManaged var mention: NSArray?
#NSManaged var hashtag: NSArray?
static func parseClassName() -> String {
return "Post"
}
override class func query() -> PFQuery<PFObject>? {
let query = PFQuery(className: Post.parseClassName())
query.whereKeyExists("objectId")
query.includeKeys(["postBy", "commentPointer", "commentPointer.commentBy", "commentBy"])
query.order(byDescending: "createdAt")
query.cachePolicy = .networkElseCache
return query
}
}
And It is my tableVieController
class FeedVC: UITableViewController, ShopDetailDelegate {
private var subscription: Subscription<Post>!
//Add friends and me
var postLiveQuery: PFQuery<Post> {
return Post.query() as! PFQuery<Post>
}
var client: Client {
return ParseLiveQuery.Client.shared
}
var results = [Post]()
I had declare subscription in ViewDidLoad()
subscription = client.subscribe(postLiveQuery).handleSubscribe { [weak self] (_) in
// Fetch the objects on subscription to not miss any
self?.fetchObjects()
}.handleEvent { [weak self] (_, event) in
self?.handleEvent(event: event)
}
And Here is what I'm trying to this.
func fetchObjects() {
postLiveQuery.limit = self.page
postLiveQuery.findObjectsInBackground().continue(with: BFExecutor.mainThread(), with: { (task) -> Any? in
guard let objects = task.result as? [Post] else {
return nil
}
self.results = objects
self.tableView.reloadData()
print("Got it!!!")
print(objects)
return nil
})
}
//load more
func morefetchObjects() {
if page <= results.count {
//Start animating indicator
indicator.startAnimating()
//increase page size to load + 10 posts
page = page + 1
postLiveQuery.limit = self.page
postLiveQuery.findObjectsInBackground().continue(with: BFExecutor.mainThread(), with: { (task) -> Any? in
guard let objects = task.result as? [Post] else {
return nil
}
self.results = objects
self.tableView.reloadData()
print("morefetchObjects")
print(objects)
return nil
})
}
}
//scrolled down
override func scrollViewDidScroll(_ scrollView: UIScrollView) {
if scrollView.contentOffset.y >= scrollView.contentSize.height - self.view.frame.size.height * 2 {
morefetchObjects()
}
}
It works fine but When I called fetchObject() then It retrieve all of datas from parse-server. I want fetch only limits and then When I scroll down I wish to get retrieve more data.
How can I implement this?