无法使用索引类型 int 为 [CLPlacemark] 类型的值下标答案

【问题标题】：Cannot subscript a value of type [CLPlacemark] with an index type int无法使用索引类型 int 为 [CLPlacemark] 类型的值下标
【发布时间】：2015-06-14 13:26:33
【问题描述】：

我想检索当前位置。我在 swift Xcode 7 上工作。我查看了 PLUSIEUR 教程，但每次他们都使用相同的方法。这是我的代码和我的错误：！

错误：无法使用索引为 [CLPlacemark] 类型的值下标输入int

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    let LocationManager = CLLocationManager()

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

    self.LocationManager.delegate = self
    self.LocationManager.desiredAccuracy = kCLLocationAccuracyBest
    self.LocationManager.requestWhenInUseAuthorization()
    self.LocationManager.startUpdatingLocation()

}

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



func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]) {
    CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: { (placemarks, error) -> Void in

        if (error != nil) {
            print("Error")
            return
        }

        if placemarks!.count > 0 {
            let pm = placemarks[0] as CLPlacemark
            self.displayLocationInfo(pm)
        }
        else {
            print("errorData")
        }

    })
}

func displayLocationInfo(placemark: CLPlacemark){
    self.LocationManager.stopUpdatingLocation()

    print(placemark.locality)
    print(placemark.postalCode)
    print(placemark.administrativeArea)
    print(placemark.country)
}

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
    print("Error:" + error.localizedDescription)

    }
}

【问题讨论】：

标签： ios xcode swift ios8 xcode7

【解决方案1】：

不，在 Xcode 7 中，错误是：

错误：不能为“[CLPlacemark] 类型的值下标？”具有“Int”类型的索引

注意?。你必须解开那个可选的。所以你可以替换：

if placemarks!.count > 0 {
    let placemark = placemarks[0] as CLPlacemark
    self.displayLocationInfo(placemark)
}

与：

if let placemark = placemarks?.first {
    self.displayLocationInfo(placemark)
}

【讨论】：

【解决方案2】：

我也在几乎相同的情况下遇到了这个问题。再次提示的是，它认为它没有拆包，所以放一个！对我有用。

试试这个。

let pm = placemarks![0] as CLPlacemark

【讨论】：

【解决方案3】：

     if placemarks!.count > 0
        {
             var pm:CLPlacemark!

            pm = placemarks![0] as CLPlacemark
            //let pm:CLPlacemark = placemarks.

            self.displayLocationInfo(pm)

            let locality = (pm.locality != nil) ? pm.locality : ""

            let sublocality = (pm.subLocality != nil) ? pm.subLocality : ""

            let thoroughfare = (pm.thoroughfare != nil) ? pm.thoroughfare : ""

            let country = (pm.country != nil) ? pm.country : ""

            let administrativeArea = (pm.administrativeArea != nil) ? pm.administrativeArea : ""

            print(pm.subLocality)

            var annotation = MKPointAnnotation()
            annotation.coordinate = coordinate
            annotation.title = "\(thoroughfare) \(sublocality), \(locality)"
            annotation.subtitle = "\(administrativeArea), \(country)";

            self.mapViewForVisitLocation.addAnnotation(annotation)
        }

它适用于 X-Code 7 和 Swift 2.0。

【讨论】：