每節我應該返回多少行？

Question

我試圖排序創建查詢像奕犛牛在那裏我可以在某個位置內看到消息的查詢，但每當我發佈一條消息，結果不顯示在查詢中的數據。我基本上想要我發送的消息顯示在查詢中。我想我在代碼中正確地完成了我的邏輯，但是我錯過了可以在查詢中顯示數據的內容。上週我一直在處理這個問題，只是這個修復可能會結束我的項目的這一部分。誰能幫我這個？

import UIKit 
import ParseUI 
import Parse 
import CoreLocation 

@available(iOS 8.0, *) 
class HomeViewController: PFQueryTableViewController,CLLocationManagerDelegate { 

var messages = [String]() 
var users = [String: String]() 

let bubbleFeeds = [ 
    ("1"), 
    ("2"), 
    ("I3"), 
    ("4"), 
    ("5"), 
    ("6") ] 

let locationManager = CLLocationManager() 
var currLocation : CLLocationCoordinate2D? 

override init(style: UITableViewStyle, className: String!) { 
    super.init(style: style, className: className) 
} 


required init?(coder aDecoder: NSCoder) { 
    super.init(coder: aDecoder) 

    self.parseClassName = "BubbleTest" 
    self.textKey = "textField" 
    self.pullToRefreshEnabled = true 
    self.objectsPerPage = 200 

} 

private func alert(message : String) { 
    let alert = UIAlertController(title: "Oops something went wrong.", message: message, preferredStyle: UIAlertControllerStyle.Alert) 
    let action = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil) 
    let cancel = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil) 
    let settings = UIAlertAction(title: "Settings", style: UIAlertActionStyle.Default) { (action) -> Void in 
     UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!) 
     return 
    } 
    alert.addAction(settings) 
    alert.addAction(action) 
    self.presentViewController(alert, animated: true, completion: nil) 
} 



override func viewDidLoad() { 
    super.viewDidLoad() 
    self.tableView.estimatedRowHeight = 60 
    self.tableView.rowHeight = UITableViewAutomaticDimension 
    locationManager.desiredAccuracy = 1000 
    locationManager.delegate = self 
    locationManager.requestWhenInUseAuthorization() 
    locationManager.startUpdatingLocation() 


    // Uncomment the following line to preserve selection between presentations 
    // self.clearsSelectionOnViewWillAppear = false 

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller. 
    // self.navigationItem.rightBarButtonItem = self.editButtonItem() 
} 

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) { 
    alert("Cannot fetch your location") 
} 




func queryForTable() -> PFQuery! { 
    let query = PFQuery(className: "BubbleTest") 
    if let queryLoc = currLocation { 
     query.whereKey("location", nearGeoPoint: PFGeoPoint(latitude: queryLoc.latitude, longitude: queryLoc.longitude), withinMiles: 10) 
     query.limit = 200; 
     query.orderByDescending("createdAt") 
    } else { 
     /* Decide on how the application should react if there is no location available */ 
     query.whereKey("location", nearGeoPoint: PFGeoPoint(latitude: 37.411822, longitude: -121.941125), withinMiles: 10) 
     query.limit = 200; 
     query.orderByDescending("createdAt") 
    } 

    return query 
} 


func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 
    locationManager.stopUpdatingLocation() 
    if(locations.count > 0){ 
     let location = locations[0] 
     print(location.coordinate) 
     currLocation = location.coordinate 
    } else { 
     alert("Cannot receive your location") 
    } 
} 


    override func objectAtIndexPath(indexPath: NSIndexPath!) -> PFObject! { 
     var obj : PFObject? = nil 
     if(indexPath.row < self.objects!.count){ 
      obj = self.objects![indexPath.row] as! PFObject 
     } 

     return obj 
    } 


// override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
// 
// 




// MARK: - Table view data source 

override func numberOfSectionsInTableView(tableView: UITableView) -> Int { 
    // #warning Incomplete implementation, return the number of sections 
    return 1 
} 

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    // #warning Incomplete implementation, return the number of rows 
    return users.count 

} 



override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
    let cell = tableView.dequeueReusableCellWithIdentifier("object", forIndexPath: indexPath) as! Bubbles 
let object = PFObject(className: "BubbleTest") 

cell.name.text = object.valueForKey ("userName") as? String 
cell.message.text = object.valueForKey("textField") as? String 
cell.dateTime.text = "\((indexPath.row + 1) * 3)m ago" 
cell.message.numberOfLines = 0 
let score = object.valueForKey("count") as! Int 
cell.likeCount.text = "\(score)" 
let replycnt = object.valueForKey("replies") as! Int 
cell.responseCount.text = "\(replycnt) replies" 
//cell.userImage.image = PFUser.currentUser()?.valueForKey("photo") as! PFFile 


// Configure the cell... 

return cell 
} 

@IBAction func likeButton(sender: AnyObject) { 
      let hitPoint = sender.convertPoint(CGPointZero, toView: self.tableView) 
      let hitIndex = self.tableView.indexPathForRowAtPoint(hitPoint) 
      let object = objectAtIndexPath(hitIndex) 
      object.incrementKey("count") 
      object.saveInBackground() 
      self.tableView.reloadData() 
      NSLog("Top Index Path \(hitIndex?.row)") 
} 

Answer 1

你覆蓋的行數段，返回用戶的數量，而且是始終爲零，因爲你永遠不添加任何東西到字典中。

一個PF查詢表視圖控制器的全部意義在於它所管理的數據採集你，但你要替換的是關鍵零部件和破壞系統。回去查看用戶指南，以確定您的子類需要如何工作以達到所需的效果。