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我想使用後臺gps背景，並設置應用程序寄存器以進行位置更新。 我想我的應用程序沒有被系統殺死，但是當10分鐘我的應用程序關閉。應用程序在後臺取消
我的代碼是：
#import "AppDelegate.h"
#import "ViewController.h"
@implementation AppDelegate
@synthesize locationManager;
- (void)dealloc
{
[_window release];
[_viewController release];
[super dealloc];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDir = [paths objectAtIndex:0];
NSString *logPath = [documentDir stringByAppendingPathComponent:@"decrypt.log"];
freopen([logPath cStringUsingEncoding:NSASCIIStringEncoding], "w", stderr);
timer_public = [NSTimer scheduledTimerWithTimeInterval:5*60
target:self
selector:@selector(locationManagerDidTimeout)
userInfo:nil
repeats:YES];
self.locationManager = [[CLLocationManager alloc] init];
[self.locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
//self.locationManager.distanceFilter = kCLDistanceFilterNone; //report all movement
self.locationManager.distanceFilter = 1; //report all movement
self.locationManager.delegate = self;
[self.locationManager startUpdatingLocation];
late=0;
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
-(void)showNotificationWithAlertBody:(NSString *)alertBody object:(id)object objectkey:(NSString *)objectkey{
UILocalNotification *alarm = [[UILocalNotification alloc] init];
if (alarm) {
alarm.fireDate = [NSDate date];
alarm.timeZone = [NSTimeZone defaultTimeZone];
alarm.repeatInterval = 0;
alarm.soundName = UILocalNotificationDefaultSoundName;
alarm.alertBody =[NSString stringWithFormat:@" %f",[[UIDevice currentDevice]batteryLevel]];
// alarm.alertAction
// NSDictionary *infoDic = [NSDictionary dictionaryWithObject:object forKey:objectkey];
// alarm.userInfo = infoDic;
// UIApplication *app = [UIApplication sharedApplication];
// [app scheduleLocalNotification:alarm];
NSLog(@"alarm=%@",alarm);
[[UIApplication sharedApplication] presentLocalNotificationNow:alarm];
}
}
-(NSString *)returnTime_All:(NSDate *)date{
NSDate *dateStr=[NSDate dateWithTimeIntervalSince1970:[date timeIntervalSince1970]];
NSDateFormatter* formatter = [[[NSDateFormatter alloc] init]autorelease] ;
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *strDate=[formatter stringFromDate:dateStr];
return strDate;
}
-(void)locationManagerDidTimeout
{
NSLog(@"time=%@", [self returnTime_All:[NSDate date] ]);
}
//retrieve the coordinate
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(@"++++++++++++++++");
NSTimeInterval new=[[NSDate date] timeIntervalSince1970];
NSTimeInterval cha=new-late;
if(cha>=5*60){
// if ([newLocation horizontalAccuracy] > 0.0f && [newLocation horizontalAccuracy] <= 100.0f)
// {
late=[[NSDate date] timeIntervalSince1970]*1;
NSString *strLoc=[NSString stringWithFormat:@"latitude=%f longitude=%f",newLocation.coordinate.latitude,newLocation.coordinate.longitude];
NSData *imgData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:@"www.baidu.com"]];
NSString *str=[[NSString alloc]initWithData:imgData encoding:NSUTF8StringEncoding];
NSLog(@"str=%@",str);
[self showNotificationWithAlertBody:strLoc object:nil objectkey:nil];
}
}
- (void)backgroundHandler {
NSLog(@"### -->backgroundinghandler");
UIApplication* app = [UIApplication sharedApplication];
__block UIBackgroundTaskIdentifier bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
// Start the long-running task
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self.locationManager stopMonitoringSignificantLocationChanges];
self.locationManager.delegate=self;
[self.locationManager startUpdatingLocation];
[NSThread sleepForTimeInterval:2];
[self.locationManager stopUpdatingLocation];
});
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
/*
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 stopUpdatingLocation];
// [self.locationManager startMonitoringSignificantLocationChanges];
late=[[NSDate date] timeIntervalSince1970];
BOOL isInBackground = YES;
if ([UIApplication sharedApplication].applicationState == UIApplicationStateBackground)
{
isInBackground = YES;
[self backgroundHandler];
}
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
if (self.locationManager==nil) {
self.locationManager = [[CLLocationManager alloc] init];
// self.locationManager.distanceFilter = kCLDistanceFilterNone; //report all movement
[self.locationManager stopMonitoringSignificantLocationChanges];
[self.locationManager setDesiredAccuracy:kCLLocationAccuracyHundredMeters];//精確度
}
[self.locationManager stopMonitoringSignificantLocationChanges];
self.locationManager.delegate=self;
[self.locationManager startUpdatingLocation];
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// 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.
}
- (void)applicationWillTerminate:(UIApplication *)application
{
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
NSLog(@"### -->applicationWillTerminate");
}
@end
您是否編輯了您的info.plist以允許在後臺進行位置更新？ – ekims
是的，我已經添加它 – pengwang