PFQuery TableViewController没有加载自定义单元格

时间:2015-02-03 01:04:39

标签: xcode swift parse-platform

我正在处理一个应用程序,我希望它能够根据与当前用户相距一定距离的用户来填充单元格。由于某种原因,自定义单元没有填充正确的对象。应该检索的标签和图像是空白的。我得到的只是一个空白单元格。我确保给了单元标识符正确的名称,我还确保将tableviewcontroller和tablecellview链接到各自的类,但仍然没有运气。

首先我创建了初始化器:

class TableViewController: PFQueryTableViewController, CLLocationManagerDelegate {



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 = "User"
    self.textKey = "FBName"
   // self.imageKey = "pictureURL"
    self.pullToRefreshEnabled = true
    self.objectsPerPage = 10
    self.paginationEnabled = true

}

然后在viewDidLoad中我启用了位置服务:

    override func viewDidLoad() {
    super.viewDidLoad()
    self.tableView.estimatedRowHeight = 200
    self.locationManager.requestWhenInUseAuthorization()

    if CLLocationManager.locationServicesEnabled() {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()
        locationManager.startUpdatingLocation()
        loadData()
        println("location services enabled bruh")
    }
}

接下来我覆盖了queryfortable函数:

 override func queryForTable() -> PFQuery! {
    let query = PFQuery(className: "User")
    if let queryLoc = currLocation {
        query.whereKey("location", nearGeoPoint: PFGeoPoint(latitude: queryLoc.latitude, longitude: queryLoc.longitude), withinMiles: 50)
        query.limit = 40
        query.orderByAscending("createdAt")
        println("\(queryLoc.latitude)")
        return query

    } else {
        query.whereKey("location", nearGeoPoint: PFGeoPoint(latitude: 37.411822, longitude: -121.941125), withinMiles: 50)
        query.limit = 40
        query.orderByAscending("createdAt")
        println("else statement")
        return query

    }
}

然后是objectAtIndexPath函数

 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

}

最后我退回了单元格,但由于某种原因它不起作用:

 override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!, object: PFObject?) -> PFTableViewCell! {
    let cell = tableView.dequeueReusableCellWithIdentifier("CustomCell", forIndexPath: indexPath) as TableViewCell
    cell.userName?.text = object?.valueForKey("FBName") as? String
   let userProfilePhotoURLString = object?.valueForKey("pictureURL") as? String
    var pictureURL: NSURL = NSURL(string: userProfilePhotoURLString!)!
    var urlRequest: NSURLRequest = NSURLRequest(URL: pictureURL)
    NSURLConnection.sendAsynchronousRequest(urlRequest, queue: NSOperationQueue.mainQueue()) { (NSURLResponse response, NSData data,NSError error) -> Void in
        if error == nil && data != nil {
            cell.userImage?.image = UIImage(data: data)
        }
    }
    cell.ratingsView?.show(rating: 4.0, text: nil)

    return cell
}

ps,我将部分的数量设置为1,只是没想到这个方法在这里展示会很有用。

1 个答案:

答案 0 :(得分:0)

好的,我发现了这个问题!问题是我尝试使用PFQuery来检索PFUser的列表。我发现无法使用PFQuery infact PFUser无法使用它自己的查询方法从用户那里检索信息。

我所要做的就是更换这一行: let query = PFQuery(className: "User") 有了这个: let query = PFUser.query()