快速本地搜索MapView

Question

我目前正在将本地搜索集成到我的iOS应用程序中，并且遇到了一些问题。一切都很好，没有任何错误，但是搜索功能并没有发生。我已经在模拟器上和我的iOS设备上运行了它，而且这个函数似乎没有运行。我已经检查了我的控制台日志，没有任何事情发生。

斜体*编辑:我已经修正了方法没有被调用的问题，但是现在我得到了下面的错误。如果需要，我可以粘贴整个调用堆栈。

"searchText:]: unrecognized selector sent to instance 0x7ff2f1c1c3b0 2015-02-16 21:10:26.818 THINKStatus[60477:1795955] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[THINKStatus.loggedinViewController searchText:]: unrecognized selector sent to instance 0x7ff2f1c1c3b0'"

下面是我的视图控制器的代码：

import Foundation
import UIKit
import MapKit

class loggedinViewController : UIViewController, MKMapViewDelegate {
@IBOutlet weak var mapView: MKMapView!
@IBOutlet weak var searchText: UITextField!
var matchingItems: [MKMapItem] = [MKMapItem]()

let service = "tgsLogin"
let userAccount = "tgsLoginUser"
let key = "RandomKey"


@IBAction func loggedinActionButton(sender: AnyObject) {
    let error = Locksmith.deleteDataForUserAccount("tgsLoginUser", inService: "tgsLogin")

    self.performSegueWithIdentifier("logoutViewSegue", sender: self)

}

@IBAction func textFieldReturn(sender: AnyObject) {
    sender.resignFirstResponder()
    mapView.removeAnnotations(mapView.annotations)
    self.performSearch()
}

func performSearch() {

    matchingItems.removeAll()
    let request = MKLocalSearchRequest()
    request.naturalLanguageQuery = searchText.text
    request.region = mapView.region

    let search = MKLocalSearch(request: request)

    search.startWithCompletionHandler({(response:
        MKLocalSearchResponse!,
        error: NSError!) in

        if error != nil {
            println("Error occured in search: \(error.localizedDescription)")
        } else if response.mapItems.count == 0 {
            println("No matches found")
        } else {
            println("Matches found")

            for item in response.mapItems as [MKMapItem] {
                println("Name = \(item.name)")
                println("Phone = \(item.phoneNumber)")

                self.matchingItems.append(item as MKMapItem)
                println("Matching items = \(self.matchingItems.count)")

                var annotation = MKPointAnnotation()
                annotation.coordinate = item.placemark.coordinate
                annotation.title = item.name
                self.mapView.addAnnotation(annotation)
            }
        }
    })
}
override func viewDidLoad() {
    super.viewDidLoad()
    mapView.showsUserLocation = true
    mapView.delegate = self


}


}

应用程序代表：

  class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?
    var locationManager: CLLocationManager?


  func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    locationManager = CLLocationManager()
    locationManager?.requestWhenInUseAuthorization()

    return true
}

Answer 1

错误消息表明，您可能在某个地方使用searchText，就好像它是一个函数。我在您的代码中没有看到这一点，所以有几种可能性：

1. 您有一些没有发布的使用它的其他代码。
2. 二进制文件与上面的源代码不同步。
3. 框架中有一个bug。

我会专注于前两件事。试着检查所有错误消息，看看代码中是否有任何失败的行指示。试着清理项目并进行重建。尝试在所有源文件中搜索"searchText“.

Answer 2

这是对我有用的密码。我看到的唯一不同是一些问号，而不是感叹号。如果这对你有用的话请告诉我。

@IBAction func textFieldReturn(sender: AnyObject) {

    sender.resignFirstResponder()
    mapView.removeAnnotations(mapView.annotations)
    self.performSearch()

}


func performSearch() {

    matchingItems.removeAll()
    let request = MKLocalSearchRequest()
    request.naturalLanguageQuery = searchText.text
    request.region = mapView.region

    let search = MKLocalSearch(request: request)

    search.startWithCompletionHandler({
        (response: MKLocalSearchResponse?,error: NSError?) in

        if error != nil {
            print("Error occured in search: \(error!.localizedDescription)")
        } else if response!.mapItems.count == 0 {
            print("No matches found")
        } else {
            print("Matches found")

            for item in response!.mapItems {
                print("Name = \(item.name)")
                print("Phone = \(item.placemark)")

                self.matchingItems.append(item as MKMapItem)
                print("Matching items = \(self.matchingItems.count)")

                let annotation = MKPointAnnotation()
                annotation.coordinate = item.placemark.coordinate
                annotation.title = item.name
                annotation.subtitle = address
                self.mapAnnotations.append(annotation)
                self.mapView.addAnnotation(annotation)

            }
        }
    })
}