不触摸屏幕就无法查看表格视图项目
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【中文标题】不触摸屏幕就无法查看表格视图项目【英文标题】：Can not see table view items without touching down the screen 【发布时间】：2016-01-28 05:28:23 【问题描述】：tableView 类中存在一些问题，我从服务器获取数据并可以在表视图中显示，但问题是当我从服务器完全获取数据时，它从未在表视图中显示，直到我触摸屏幕..当我触摸屏幕时，我可以看到我的数据，但是我想在获得数据后查看我的数据..这是我的课 ..
import Foundation
import UIKit
class MovementRep : UIViewController , UITableViewDelegate, UITableViewDataSource
var unitID : Int = 0;
var count : Int = 0;
var dateTime = [String]()
var speed = [Double]()
var event = [String]()
var location = [String]()
var len : Int = 0;
var deviation = [String]()
@IBOutlet weak var ActivityIndicator: UIActivityIndicatorView!
@IBOutlet weak var tableView: UITableView!
override func viewDidLoad()
super.viewDidLoad()
print("Movement Report Called");
print("unit ID = \(unitID)")
var id : String = String(self.unitID);
print("string id = \(id)")
//Send Server Request
let myURL = NSURL(string: "<URL>");
let request = NSMutableURLRequest(URL: myURL!);
request.HTTPMethod = "POST";
let task = NSURLSession.sharedSession().dataTaskWithRequest(request)
data, responce, error in
self.ActivityIndicator.startAnimating()
if error != nil
print("Error = \(error)")
// print("Responce = \(responce)")
// let responceString = NSString(data:data,encodeing:NSTUF8StringEncoding);
// print("Responce Data = \(responceString)");
do
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary
// print("JSONResult = \(jsonResult)")
let size = jsonResult["size"] as? Int
print("result: \(size)");
self.len = size!;
if let Users = jsonResult["movementReport"] as? [[String: AnyObject]]
//when you got irrespective response of numberOfRowsInSe...
//http://***.com/questions/31498531/numberofrowsinsection-is-called-before-alamofire-connection/31498570#31498570
self.tableView.reloadData()
for name in Users
//if you got null from Json ...
if let msg = name["message"] as? NSNull
//print("got \(d)")
self.location.append("null")
//simple chk
if let message = name["message"] as? String
self.location.append(message)
//if you got null from Json ...
if let dt = name["dateTime"] as? NSNull
//print("got \(d)")
self.location.append("null")
//simple chk
if let date = name["dateTime"] as? String
self.dateTime.append(date)
//if you got null from Json ...
if let sp = name["speed"] as? NSNull
//print("got \(d)")
self.speed.append(0.0)
//simple chk
if let speed = name["speed"] as? Double
self.speed.append(speed)
//if you got null from Json ...
if let ev = name["reportText"] as? NSNull
//print("got \(d)")
self.event.append("null")
//simple chk
if let event = name["reportText"] as? String
self.event.append(event)
//if you got null from Json ...
if let dev = name["route"] as? NSNull
//print("got \(d)")
self.deviation.append("--")
//simple chk
if let devtion = name["route"] as? String
self.deviation.append(devtion)
catch let error as NSError
print(error.localizedDescription)
task.resume();
self.tableView.reloadData();
override func viewWillAppear(animated: Bool)
super.viewWillAppear(animated)
print("ViewWillAppearCaled")
self.tableView.reloadData();
override func viewDidAppear(animated: Bool)
super.viewWillAppear(animated)
print("ViewDidAppearCaled")
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
print("table view row")
return len
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
print("table view cell")
let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CustomCell
if (len > 0)
cell.date.text = dateTime[indexPath.row];
cell.speed.text = "\(speed[indexPath.row])"
cell.position.text = event[indexPath.row]
cell.location.text = location[indexPath.row]
cell.deviation.text = deviation[indexPath.row]
cell.index.text = "\(indexPath.row+1)";
self.ActivityIndicator.stopAnimating()
return cell
return cell
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat
return 200.0
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath)
cell.contentView.backgroundColor = UIColor.clearColor()
let whiteRoundedView : UIView = UIView(frame: CGRectMake(6, 6, self.view.frame.size.width, 200.0))
whiteRoundedView.layer.backgroundColor = CGColorCreate(CGColorSpaceCreateDeviceRGB(), [1.8, 1.8, 1.8, 1.8])
whiteRoundedView.layer.masksToBounds = false
whiteRoundedView.layer.cornerRadius = 3.0
//whiteRoundedView.layer.shadowOffset = CGSizeMake(-1, 1)
whiteRoundedView.layer.shadowOpacity = 0.1
cell.contentView.addSubview(whiteRoundedView)
cell.contentView.sendSubviewToBack(whiteRoundedView)
【问题讨论】：
你有没有尝试在设置所有 api 响应数据结束时只重新加载一次表？ 我该怎么做？我不试试这个 【参考方案1】：尝试替换此代码：
override func viewDidLoad()
super.viewDidLoad()
print("Movement Report Called");
print("unit ID = \(unitID)")
var id : String = String(self.unitID);
print("string id = \(id)")
self.ActivityIndicator.startAnimating()
let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
dispatch_async(backgroundQueue,
let myURL = NSURL(string: "<URL>");
let request = NSMutableURLRequest(URL: myURL!);
request.HTTPMethod = "POST";
let task = NSURLSession.sharedSession().dataTaskWithRequest(request)
data, responce, error in
if error != nil
print("Error = \(error)")
do
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary
let size = jsonResult["size"] as? Int
print("result: \(size)");
self.len = size!;
if let Users = jsonResult["movementReport"] as? [[String: AnyObject]]
for name in Users
//if you got null from Json ...
if let msg = name["message"] as? NSNull
//print("got \(d)")
self.location.append("null")
//simple chk
if let message = name["message"] as? String
self.location.append(message)
//if you got null from Json ...
if let dt = name["dateTime"] as? NSNull
//print("got \(d)")
self.location.append("null")
//simple chk
if let date = name["dateTime"] as? String
self.dateTime.append(date)
//if you got null from Json ...
if let sp = name["speed"] as? NSNull
//print("got \(d)")
self.speed.append(0.0)
//simple chk
if let speed = name["speed"] as? Double
self.speed.append(speed)
//if you got null from Json ...
if let ev = name["reportText"] as? NSNull
//print("got \(d)")
self.event.append("null")
//simple chk
if let event = name["reportText"] as? String
self.event.append(event)
//if you got null from Json ...
if let dev = name["route"] as? NSNull
//print("got \(d)")
self.deviation.append("--")
//simple chk
if let devtion = name["route"] as? String
self.deviation.append(devtion)
self.ActivityIndicator.stopAnimating()
dispatch_async(dispatch_get_main_queue())
self.tableView?.reloadData()
catch let error as NSError
print(error.localizedDescription)
task.resume();
)
【讨论】：
没什么变化..再次..结果显示在触摸事件中。 我已经编辑了答案。尝试更新代码，因为我已将 api 调用放在后台线程中并在主队列中重新加载表视图数据。以上是关于不触摸屏幕就无法查看表格视图项目的主要内容，如果未能解决你的问题，请参考以下文章
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