无法在 ios 的表视图中显示 localsearch 响应数据

Question

我正在使用MapView 开发一个应用程序，现在有问题请帮我解决。

• 当用户输入地点名称时，我放置了一个搜索栏，然后它会根据输入的字符串给出建议。

• 使用 mapkit，我可以向默认地图发送查询，接收 MKLocalSearchResponse。

现在我的问题是来自 LocalSearchResponse 的数据没有显示在 tableView 单元格中。

请提供解决方案。

使用工具：Xcode 7.3、swift 2.2

这是我的代码，请看一下。

import UIKit
import MapKit
class ViewController: UIViewController, UISearchBarDelegate,UITableViewDelegate {

var searchController:UISearchController!
var annotation:MKAnnotation!
var localSearchRequest:MKLocalSearchRequest!
var localSearch:MKLocalSearch!
var localSearchResponse:MKLocalSearchResponse!
var items1:String = ""

var error:NSError!
var pointAnnotation:MKPointAnnotation!
var pinAnnotationView:MKPinAnnotationView!
var matchingItems: [MKMapItem] = [MKMapItem]()
var mapItems: [MKMapItem] = [MKMapItem]()
var itm : [String] = []

@IBAction func showSearchBar(sender: AnyObject) {
    searchController = UISearchController(searchResultsController: nil)
    searchController.hidesNavigationBarDuringPresentation = false
    self.searchController.searchBar.delegate = self
    presentViewController(searchController, animated: true, completion: nil)

}

@IBOutlet var mapView: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

    func searchBarSearchButtonClicked(searchBar: UISearchBar){

    searchBar.resignFirstResponder()
    dismissViewControllerAnimated(true, completion: nil)
    if self.mapView.annotations.count != 0{
        annotation = self.mapView.annotations[0]
        self.mapView.removeAnnotation(annotation)
    }

    localSearchRequest = MKLocalSearchRequest()
    localSearchRequest.naturalLanguageQuery = searchBar.text
    localSearch = MKLocalSearch(request: localSearchRequest)
    localSearch.startWithCompletionHandler { (localSearchResponse, error) -> Void in

        if localSearchResponse == nil{
            let alertController = UIAlertController(title: nil, message: "Place Not Found", preferredStyle: UIAlertControllerStyle.Alert)
            alertController.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.Default, handler: nil))
            self.presentViewController(alertController, animated: true, completion: nil)
            return
        }

        for item in localSearchResponse!.mapItems {

            print("Name = \(item.name)")
            self.items1 = item.name!

            self.matchingItems.append(item as MKMapItem)
            print("Matching items = \(self.matchingItems.count)")
                }
        self.pointAnnotation = MKPointAnnotation()
        self.pointAnnotation.title = searchBar.text
        self.pointAnnotation.coordinate = CLLocationCoordinate2D(latitude: localSearchResponse!.boundingRegion.center.latitude, longitude:     localSearchResponse!.boundingRegion.center.longitude)


        self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation, reuseIdentifier: nil)
        self.mapView.centerCoordinate = self.pointAnnotation.coordinate
        self.mapView.addAnnotation(self.pinAnnotationView.annotation!)
    }

}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return matchingItems.count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) ->UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! UITableViewCell
let entry = matchingItems[indexPath.row]
cell.textLabel!.text = items1[indexPath.row]

return cell
}

}

Answer 1

1. 使用情节提要正确地将tableView 的delegate 和datasource 设置为关联的viewController查看图片
2. 在您的类中添加委托和数据源，两者都用逗号分隔，例如 UITableViewDataSource、UITableViewDelegate。

现在你不需要在程序中设置委托了。

• 每次键入单个单词时或相应地调用 reloadData() 函数。