【发布时间】：2015-08-07 23:50:51
【问题描述】：
我已成功在我的 Swift 项目上的 UITableView 上添加了 Pull To Refresh，但在另一个 ViewController 上我无法显示它。 在其他视图中，没有 LocationManager 函数的代码是相同的。 我不知道我的错误在哪里！
在我的代码下面：
import UIKit
import CoreLocation
class MainViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, CLLocationManagerDelegate {
var locationManager: CLLocationManager!
var locationCoordinates: CLLocationCoordinate2D!
@IBOutlet weak var bannerView: GADBannerView!
var dati = NSMutableArray()
var datiComplete = NSDictionary()
@IBOutlet weak var tableView: UITableView!
var arrayOfData: [MyData] = [MyData]()
var url:NSURL!
var refreshControl = UIRefreshControl()
var dateFormatter = NSDateFormatter()
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager = CLLocationManager()
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest //Battery drain!
self.locationManager.distanceFilter = 1
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
searchUser()
self.dateFormatter.dateStyle = NSDateFormatterStyle.ShortStyle
self.dateFormatter.timeStyle = NSDateFormatterStyle.LongStyle
self.refreshControl = UIRefreshControl()
self.refreshControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
self.refreshControl.addTarget(self, action: "refresh:", forControlEvents: UIControlEvents.ValueChanged)
self.tableView.insertSubview(refreshControl, atIndex: 0)
self.handleRefresh()
}
func refresh(sender:AnyObject)
{
println("Refresh work!")
self.handleRefresh()
}
func handleRefresh() {
if locationManager.location != nil {
url = NSURL(string: "http://www.myURL.com/data.php?lat=\(locationManager.location.coordinate.latitude)&lon=\(locationManager.location.coordinate.longitude)&max=15&when=now")!
} else {
url = NSURL(string: "http://www.myURL.com/data.php?lat=41&lon=11&max=10&when=now")!
}
//println("Call URL!!")
var request:NSMutableURLRequest = NSMutableURLRequest(URL: url)
request.HTTPMethod = "GET"
request.setValue("application/json", forHTTPHeaderField: "Accept")
var reponseError: NSError?
var response: NSURLResponse?
//var urlData: NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&reponseError)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {
response, data, error in
if (error != nil) {
return
}
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
var error: NSError?
self.dati = (NSJSONSerialization.JSONObjectWithData(data, options: .MutableContainers, error: &error) as! NSDictionary)["spots"] as! NSMutableArray
if (error != nil){
return
}
// **** Json Parsing *****
dispatch_async(dispatch_get_main_queue()){
self.tableView.reloadData()
self.tableView.delegate = self
self.tableView.dataSource = self
}
}
})
let now = NSDate()
let updateString = "Last Updated at " + self.dateFormatter.stringFromDate(now)
self.refreshControl.attributedTitle = NSAttributedString(string: updateString)
if self.refreshControl.refreshing
{
self.refreshControl.endRefreshing()
}
self.tableView?.reloadData()
refreshControl.endRefreshing()
}
func searchUser(){
println("Start Search User")
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestAlwaysAuthorization()
self.locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!){
println("Start Location Manager Func")
self.locationCoordinates = manager.location.coordinate
self.locationManager.stopUpdatingLocation()
println("**************** locations = \(self.locationCoordinates.latitude) \(self.locationCoordinates.longitude)")
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.setNavigationBarItem()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrayOfData.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell: ViewCell = tableView.dequeueReusableCellWithIdentifier("Cell") as! ViewCell
cell.backgroundColor = UIColor.whiteColor()
let usr = arrayOfData[indexPath.row]
cell.setCell(<Cell-data>)
return cell
}
var selectedSpot:String? = nil
var selectedSpotIndex:Int? = nil
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "GoSpotDetails" {
var tabBarC : TabBarController = segue.destinationViewController as! TabBarController
var caseIndex = tableView!.indexPathForSelectedRow()!.row
var selectedCase = self.arrayOfSpotsTemp[caseIndex]
tabBarC.DataDetail = selectedCase
}
}
}
非常感谢。
【问题讨论】：
-
您使用了刷新视图但没有正确使用它们的属性。
-
嗨，Ghanshyam，你能建议我做些改变吗？我是 Swift 的新手。谢谢
标签： ios swift locationmanager pull-to-refresh