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我有后台模式对位置服务和瞄准位置（经度和纬度）发送到服务器每30分钟一班。现在我在控制台上打印相同的内容。它似乎工作了一段时间，但我想知道如何在这种情况下使用NSTimer。我应该从哪里调用它？发送位置，每30分钟更新斯威夫特
import UIKit
import CoreLocation
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {
var window: UIWindow?
var locationManager = CLLocationManager()
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
return true
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
self.locationManager.delegate = self
self.locationManager.startUpdatingLocation() // I know i should be using signification location option here. this is just for testing now.
}
func locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!) {
self.sendBackgroundLocationToServer(newLocation);
}
func sendBackgroundLocationToServer(location: CLLocation) {
var bgTask = UIBackgroundTaskIdentifier()
bgTask = UIApplication.sharedApplication().beginBackgroundTaskWithExpirationHandler {() -> Void in
UIApplication.sharedApplication().endBackgroundTask(bgTask)
}
println(location.coordinate.latitude)
if (bgTask != UIBackgroundTaskInvalid)
{
UIApplication.sharedApplication().endBackgroundTask(bgTask);
bgTask = UIBackgroundTaskInvalid;
}
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
application.beginBackgroundTaskWithExpirationHandler{}
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
application.beginBackgroundTaskWithExpirationHandler{}
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
application.beginBackgroundTaskWithExpirationHandler{}
}
}
也许打电话application.beginBackgroundTaskWithExpirationHandler{}是个坏主意？我在这里可以选择哪些选项？
顺便说一句，委托方法'didUpdateToLocation：fromLocation'已被弃用 - 指CLLocationManagerDelegate文档 – Paulw11 2014-10-09 04:44:17