Swift 2 CLLocationManager 错误更新答案

【问题标题】：Swift 2 CLLocationManager Error updatingSwift 2 CLLocationManager 错误更新
【发布时间】：2015-09-11 17:42:01
【问题描述】：

我使用 Swift 2 将 Xcode 6 更新为 Xcode 7 beta。我收到此错误，我不知道如何修复它，请帮助我。谢谢。这是我的代码：

 func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]) {
    let location = locations.last as! CLLocation

    let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

    self.map.setRegion(region, animated: true)
}

我得到这个错误：

Objective-C method 'locationManager:didUpdateLocations:' provided by method 'locationManager(_:didUpdateLocations:)' conflicts with optional requirement method 'locationManager(_:didUpdateLocations:)' in protocol 'CLLocationManagerDelegate'

【问题讨论】：

标签： cllocationmanager swift2 xcode7 xcode7-beta2

【解决方案1】：

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let location = locations.last as! CLLocation!
    manager.stopUpdatingLocation()
    let region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude), span: MKCoordinateSpan(latitudeDelta: 0.001, longitudeDelta: 0.001))
    mapView.setRegion(region, animated: true)
}

【讨论】：

【解决方案2】：

我通过以下代码解决了这个问题：

//CLLocationManagerDelegate
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]) {
    let location:CLLocation = locations[locations.count-1] as! CLLocation 

    if (location.horizontalAccuracy > 0) {
        self.locationManager.stopUpdatingLocation()
        print(location.coordinate, terminator: "")
        updateWeatherInfo(location.coordinate.latitude, longitude: location.coordinate.longitude)
    }
}

【讨论】：

【解决方案3】：

点击您的项目 - 转到 Build Phases->Link Binary With Libraries 并添加 CoreLocation.framework

import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

let locationManager = CLLocationManager()
var LatitudeGPS = NSString()
var LongitudeGPS = NSString()

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

func updateLocation() {
    self.locationManager.delegate = self
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
    //self.locationManager.distanceFilter = 10
    self.locationManager.requestWhenInUseAuthorization()
    self.locationManager.startUpdatingLocation()
}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]) {

    locationManager.stopUpdatingLocation() // Stop Location Manager - keep here to run just once

    LatitudeGPS = String(format: "%.6f", manager.location!.coordinate.latitude)
    LongitudeGPS = String(format: "%.6f", manager.location!.coordinate.longitude)
    print("Latitude - \(LatitudeGPS)")

}

这是我在 xcode 7 上工作的代码，我也必须清理我的代码（产品->清理）

【讨论】：

【解决方案4】：

刚遇到和你一样的问题，换个方式

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject])

到

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])

【讨论】：

AnyObject 是CLLocation 的超类型。两者都应该工作。
我知道，但是当我将它从 [AnyObject] 更改为 [CLLocation] 时，错误消失了。
已经尝试过了，它可以工作，但它在这一行给了我一个错误：let location = locations.last as! CLLocation 说locations.last 不能是CLLocation
我通过let location = locations.last as! CLLocation!修复它
我喜欢在斯坦福的 iOS 课程中，Paul Hegarty 抱怨“AnyObject”超类型，现在 Apple 在 Swift 2 中修复了它。:P

【解决方案5】：

您需要使用@objc 属性标记您的类或方法。所以要么：

@objc class MyManagerDelegate: NSObject, CLLocationManagerDelegate {

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]) {
        ...
    }

}

或者：

class MyManagerDelegate: CLLocationManagerDelegate {

    @objc func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject]) {
        ...
    }

}

【讨论】：