这是我的应用程序第二次被GPS背景密钥拒绝。这是我正在使用的代码：
-(void)stopGPS{
[self.locationManagerAll stopUpdatingLocation];
self.locationManagerAll.delegate = nil;
locationManagerAll = nil;
self.cloop = 1;
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setValue:[NSNumber numberWithBool:NO] forKey:@"UpdateLocation"];
[prefs setValue:[NSNumber numberWithInt:0] forKey:@"updationTime"];
[prefs synchronize];
[set.gpsOnOff setOn:NO];
[set.settingsTable reloadData];
[self stopThread];
}
-(void)startGPS{
if ([CLLocationManager locationServicesEnabled]){
if(self.locationManagerAll == nil){
self.locationManagerAll = [[CLLocationManager alloc] init];
self.locationManagerAll.delegate = self;
}
self.locationManagerAll.desiredAccuracy = kCLLocationAccuracyHundredMeters;
self.locationManagerAll.distanceFilter = kCLDistanceFilterNone;
[self.locationManagerAll startUpdatingLocation];
}else {
[set.gpsOnOff setOn:NO];
[set.settingsTable reloadData];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location Service Disabled"
message:@"To re-enable, please go to Settings and turn on Location Service for this app."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
}
上述功能用于启动或停止GPS位置，以下是GPS定位的实现：
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
if ([oldLocation.timestamp timeIntervalSinceNow] < - 5) return;
if (newLocation.horizontalAccuracy > 5.0) return;
if (newLocation.coordinate.latitude == oldLocation.coordinate.latitude && newLocation.coordinate.longitude == oldLocation.coordinate.longitude) return;
NSString *currentLatitude = [[NSString alloc]
initWithFormat:@"%f",
newLocation.coordinate.latitude];
NSString *currentLongitude = [[NSString alloc]
initWithFormat:@"%f",
newLocation.coordinate.longitude];
[prefs setValue:currentLatitude forKey:@"UpdateLocationLati"];
[prefs setValue:currentLongitude forKey:@"UpdateLocationLongi"];
[prefs synchronize];
[currentLatitude release];
[currentLongitude release];
if (self.cloop == 1) {
/*UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:@"Current location saved." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release]; */
self.cloop = 0;
[prefs setValue:[NSNumber numberWithInt:60] forKey:@"updationTime"];
[prefs setValue:[NSNumber numberWithBool:YES] forKey:@"UpdateLocation"];
[prefs synchronize];
[set.gpsOnOff setOn:YES];
[set.settingsTable reloadData];
[self startThread];
}
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
if ([error code] != kCLErrorLocationUnknown) {
[self stopGPS];
UIAlertView *alert = [[UIAlertView alloc] init];
[alert setTitle:@"Location"];
[alert setMessage:@"Unable to get current location"];
[alert setDelegate:self.set];
[alert addButtonWithTitle:@"Cancel"];
[alert addButtonWithTitle:@"Retry"];
[alert show];
[alert release];
}
}
我也使用一个计时器线程，每秒钟后更新服务器上的位置。当应用程序转到后台时计时器停止我正在使用此代码来处理此问题：
- (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.*/
if ([[UIDevice currentDevice] respondsToSelector:@selector(isMultitaskingSupported)]) { //Check if our iOS version supports multitasking I.E iOS 4
if ([[UIDevice currentDevice] isMultitaskingSupported]) { //Check if device supports mulitasking
UIApplication *application = [UIApplication sharedApplication]; //Get the shared application instance
__block UIBackgroundTaskIdentifier background_task; //Create a task object
background_task = [application beginBackgroundTaskWithExpirationHandler: ^{
[application endBackgroundTask:background_task];
//Tell the system that we are done with the tasks
background_task = UIBackgroundTaskInvalid; //Set the task to be invalid
//System will be shutting down the app at any point in time now
}];
//Background tasks require you to use asyncrous tasks
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
//Perform your tasks that your application requires
//I do what i need to do here.... synchronously...
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
if ([[prefs objectForKey:@"updationTime"] intValue] > 0 && [[prefs objectForKey:@"UpdateLocation"] boolValue]) {
self.backgroundTimer = [NSTimer timerWithTimeInterval:[[prefs objectForKey:@"updationTime"] intValue] target:self selector:@selector(backgroundTriggerTimer) userInfo:nil repeats:YES];
NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
[runLoop addTimer:backgroundTimer forMode:NSRunLoopCommonModes];
[runLoop run];
}
[application endBackgroundTask:background_task];
//End the task so the system knows that you are done with what you need to perform
background_task = UIBackgroundTaskInvalid; //Invalidate the background_task
});
}else if (![[UIDevice currentDevice] isMultitaskingSupported]) {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
if ([[prefs objectForKey:@"UpdateLocation"] boolValue]){
[self stopGPS];
}
}
}else if (![[UIDevice currentDevice] isMultitaskingSupported]) {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
if ([[prefs objectForKey:@"UpdateLocation"] boolValue]){
[self stopGPS];
}
}
}
这是我正在使用的线程代码：
-(void)startThread
{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
if ([[prefs objectForKey:@"UpdateLocation"] boolValue]) {
self.updateLocation = [[NSThread alloc] initWithTarget:self selector:@selector(setUpTimerThread) object:nil];
[self.updateLocation start];
}
}
-(void)stopThread{
[self.updateLocation cancel];
updateLocation = nil;
[self.gpsTimer invalidate];
}
-(void)setUpTimerThread
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
if ([[prefs objectForKey:@"updationTime"] intValue] > 0) {
self.gpsTimer = [NSTimer timerWithTimeInterval:[[prefs objectForKey:@"updationTime"] intValue] target:self selector:@selector(triggerTimer) userInfo:nil repeats:YES];
NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
[runLoop addTimer:gpsTimer forMode:NSRunLoopCommonModes];
[runLoop run];
}
[pool release];
}
-(void)triggerTimer
{
NSLog(@"***Timer Called after seconds**");
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSString *location = [[[NSString alloc] initWithFormat:@"%f_%f",[[prefs objectForKey:@"UpdateLocationLati"] doubleValue], [[prefs objectForKey:@"UpdateLocationLongi"] doubleValue]] autorelease];
NSString *urlGen = [[[NSString alloc] initWithFormat:@"%@%d/%@",[prefs objectForKey:@"update_user_location"],[[prefs objectForKey:@"USERID"] intValue], location] autorelease];
NSLog(@"urlGen: %@", urlGen);
NSString *rt = [JSONModel stringWithUrl:urlGen];
if (self.alertLoop == 1) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:@"GPS location has been sent. This alert message will only prompt you once." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];
self.alertLoop = 0;
}
NSLog(@"UPDATE LOCATION : %d", [rt intValue]);
}
我完全糊涂了。我不知道我是否想念一些东西。任何人都可以帮助我。
答案 0 :(得分：5)
看起来你没有错过任何东西，但2.16拒绝的可能原因之一是iTunesConnect中应用程序元的应用程序描述中没有GPS电池警告 - “继续使用GPS可能会缩短电池续航时间”或类似的东西。