【发布时间】：2017-07-04 10:09:05
【问题描述】：
以下代码是我为 swift 3.0.2 更新的应用程序委托文件
import UIKit
import CoreLocation
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {
var window: UIWindow?
var locationManager: CLLocationManager?
var significatLocationManager : CLLocationManager?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
if(UIApplication.shared.backgroundRefreshStatus == UIBackgroundRefreshStatus.available){
print("yes")
}else{
print("no")
}
if launchOptions != nil{
let remoteNotif = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? NSDictionary
if remoteNotif != nil {
self.significatLocationManager = CLLocationManager()
self.significatLocationManager?.delegate = self
self.significatLocationManager?.requestAlwaysAuthorization()
if #available(iOS 9.0, *) {
self.significatLocationManager!.allowsBackgroundLocationUpdates = true
}
self.significatLocationManager?.startMonitoringSignificantLocationChanges()
}else{
self.locationManager = CLLocationManager()
self.locationManager?.delegate = self
self.locationManager?.requestAlwaysAuthorization()
if #available(iOS 9.0, *) {
self.locationManager!.allowsBackgroundLocationUpdates = true
}
self.locationManager?.startMonitoringSignificantLocationChanges()
}
}else{
self.locationManager = CLLocationManager()
self.locationManager?.delegate = self
self.locationManager?.requestAlwaysAuthorization()
if #available(iOS 9.0, *) {
self.locationManager!.allowsBackgroundLocationUpdates = true
}
self.locationManager?.startMonitoringSignificantLocationChanges()
}
return true
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]){
//let locationArray = locations as NSArray
//let locationObj = locationArray.lastObject as! CLLocation
//let coord = locationObj.coordinate
let currentLocation = locations.last!
//print("Current location: \(currentLocation)")
print("delegate longitude: \(currentLocation.coordinate.longitude)")
print("delegate latitude: \(currentLocation.coordinate.latitude)")
let t_longtitude = String(currentLocation.coordinate.longitude)
let t_latitude = String(currentLocation.coordinate.latitude)
let longtitude:Double = currentLocation.coordinate.longitude as Double
let latitude:Double = currentLocation.coordinate.latitude as Double
let svd_longtitude:Double = (UserDefaults.standard.object(forKey: "longtitude") as? Double)!
let svd_latitude:Double = (UserDefaults.standard.object(forKey: "latitude") as? Double)!
let coordinate1 = CLLocation(latitude: latitude, longitude: longtitude)
let coordinate2 = CLLocation(latitude: svd_latitude, longitude: svd_longtitude)
let distanceInMeters = coordinate1.distance(from: coordinate2) // result is in meters
print("distanceInMeters: \(distanceInMeters)")
UserDefaults.standard.set(latitude, forKey: "latitude")
UserDefaults.standard.set(longtitude, forKey: "longtitude")
UserDefaults.standard.synchronize()
let device_id = UIDevice.current.identifierForVendor!.uuidString
let status = update_device(longtitude: t_longtitude, latitude: t_latitude, device_id: device_id)
print("status: \(status)")
}
func applicationDidEnterBackground(_ application: UIApplication) {
if self.significatLocationManager != nil {
self.significatLocationManager?.startMonitoringSignificantLocationChanges()
}else{
self.locationManager?.startMonitoringSignificantLocationChanges()
}
}
func update_device(longtitude: String, latitude:String, device_id:String) -> Int {
print("update device")
let deviceID = UIDevice.current.identifierForVendor!.uuidString
var status:Int = 0
var request = URLRequest(url: URL(string: "https://someurl")!)
request.httpMethod = "POST"
let postString = "device_id=\(deviceID)&longtitude=\(longtitude)&latitude=\(latitude)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else { // check for fundamental networking error
print("error=\(String(describing: error))")
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(String(describing: response))")
}
let responseString:String = (String(data: data, encoding: .utf8))!
print("responseString = \(String(describing: responseString))")
let dict = self.convertToDictionary(text: responseString)
//UserDefaults.standard.set(dict, forKey: "myUserDetails")
//UserDefaults.standard.synchronize()
//self.activityIndicator.stopAnimating()
//let status:Int = dict?["status"] as! Int
print("status: \(status)")
status = dict?["status"] as! Int
}
task.resume()
return status
}
func convertToDictionary(text: String) -> [String: Any]? {
if let data = text.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}
}
我一直要求允许，更新 info.plist 与
<key>NSLocationAlwaysUsageDescription</key>
<string>This app needs access to your location</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>This app needs access to your location</string>
<key>UIBackgroundModes</key>
<array>
<string>location</string>
</array>
代码有效并且我的数据库正在被填满，但是当应用程序在后台时，didUpdateLocations 被触发到远离一个位置。当旧位置和新位置之间的变化小于 200 米时，我该怎么做才能让应用调用 didUpdateLocations
谢谢
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标签： ios xcode swift3 xcode8 core-location