在向上滚动从服务器获取数据时动态显示文本

import UIKit

class Profile: UIViewController,UIScrollViewDelegate,UITextViewDelegate{


@IBOutlet weak var tx: UITextView!
@IBOutlet weak var sc: UIScrollView!
@IBOutlet weak var l1: UILabel!


@IBOutlet weak var l2: UILabel!


@IBOutlet weak var l3: UILabel!
@IBOutlet weak var l4: UILabel!

@IBOutlet weak var l5: UILabel!

@IBOutlet weak var l6: UILabel!


@IBOutlet weak var l7: UILabel!

@IBOutlet weak var l8: UILabel!


@IBOutlet weak var l9: UILabel!


@IBOutlet weak var l10: UILabel!


@IBOutlet weak var l11: UILabel!



@IBOutlet weak var l12: UILabel!



@IBOutlet weak var l13: UILabel!



@IBOutlet weak var l14: UILabel!



@IBOutlet weak var l15: UILabel!


@IBOutlet weak var l16: UILabel!


@IBOutlet weak var l17: UILabel!

@IBOutlet weak var l18: UILabel!


@IBOutlet weak var l19: UILabel!


@IBOutlet weak var l20: UILabel!



var toPass:String!
var toPass1: String!

var toPass2: String!
var toPass3: String!
var toPass4: String!
var toPass5: String!
var toPass6: String!
var toPass7: String!
var toPass8: String!
var toPass9: String!
var toPass10: String!

var toPass11: String!

var toPass12: String!
var toPass13: String!
var toPass14: String!
var toPass15: String!
var toPass16: String!
var toPass17: String!
var toPass18: String!
var toPass19: String!
var toPass20: String!


override func viewDidLoad() {

    super.viewDidLoad()

    l1.text = toPass
    l2.text = toPass1
    l3.text = toPass2
    l4.text = toPass3
    l5.text = toPass4
    l6.text = toPass5
    l7.text = toPass6
    l8.text = toPass7
    l9.text = toPass8
    l10.text = toPass9
    l11.text = toPass10
    l12.text = toPass11
    l13.text = toPass12
    l14.text = toPass13
    //l15.text = toPass14
    l16.text = toPass15
    l17.text = toPass16
    l18.text = toPass17
    l19.text = toPass13
    l20.text = toPass20
    tx.text = "\(toPass20)" + "\(toPass20)" 

    sc.minimumZoomScale = 1.0
    sc.maximumZoomScale = 10
    sc.delegate = self



}



func scrollViewWillBeginDragging(sc: UIScrollView)
  {


    NSLog("hello")
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}

}
import UIKit

class Profile: UIViewController,U