Question

我无法找到设备的高度，我需要在我的应用程序中显示海拔高度我该怎么做？我试过了：

 var locationManager:CLLocationManager = CLLocationManager()

override func viewDidLoad() {

    super.viewDidLoad()
    self.locationManager = CLLocationManager()
    locationManager.requestWhenInUseAuthorization()
    self.locationManager.delegate = self
    self.locationManager.distanceFilter = kCLDistanceFilterNone
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
    self.locationManager.startUpdatingLocation()

}


func locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!) {
    var alt = newLocation.altitude
    print("\(alt)")
    manager.stopUpdatingLocation()
}

没有出现......

Answer 1

实际上你没有调用正确的委托方法，你正在调用： locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!)但是能够为您提供所需内容的是locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])，

因此，如果您确实在NSLocationWhenInUseUsageDescription文件中实现了Info.plist密钥，并且弹出窗口显示您只需删除您的功能并添加此功能，那么它应该有效：

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    guard let lastLocation = locations.last else {
        NSLog("error no last location")
        return
    }
    let altitude = lastLocation.altitude
     // Do what you want with your altitude
}

我还建议您不要在此委托函数中调用locationManager.stopUpdatingLocation()。

希望这会对你有所帮助！

注意：此语法适用于Swift 3.0，但我认为您只需删除Swift 2.2的委托函数中的_。

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1 个答案: