Ios didUpdateLocations每秒都会调用延迟更新
我正在尝试实施延迟位置更新,以获得更好的电池消耗。 我将这样启动我的位置管理器:Ios didUpdateLocations每秒都会调用延迟更新,ios,cllocationmanager,Ios,Cllocationmanager,我正在尝试实施延迟位置更新,以获得更好的电池消耗。 我将这样启动我的位置管理器: - (void)initCoreLocation { self.locationManager = [[CLLocationManager alloc] init]; self.locationManager.delegate = self; self.locationManager.distanceFilter = kCLDistanceFilterNone; self.locat
- (void)initCoreLocation
{
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.distanceFilter = kCLDistanceFilterNone;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
self.locationManager.pausesLocationUpdatesAutomatically = YES;
self.locationManager.activityType = CLActivityTypeAutomotiveNavigation;
//Très important pour iOS9 !
if ([self.locationManager respondsToSelector:@selector(allowsBackgroundLocationUpdates)]) {
self.locationManager.allowsBackgroundLocationUpdates=YES;
}
if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
[self.locationManager requestAlwaysAuthorization];
}
[self.locationManager startUpdatingLocation];
[self.locationManager startMonitoringSignificantLocationChanges];
}
以这种方式启动延迟更新:
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
if (!self.deferringUpdates) {
[self.locationManager allowDeferredLocationUpdatesUntilTraveled:CLLocationDistanceMax timeout:30];
self.deferringUpdates = YES;
}
}
-(void)locationManager:(CLLocationManager *)manager didFinishDeferredUpdatesWithError:(NSError *)error { // Stop deferring updates
if(error) {
NSLog(@"error");
}
NSLog(@"didFinishDeferredUpdates");
self.deferringUpdates = NO;
}
我每30秒记录一次
didfishdeferredupdates
log,但是didfupdatelocations
每秒都会不断呼叫,排除任何优化电池消耗的尝试。是否假设位置经理每30秒调用一次didUpdateLocations
?我相信您一次只需要其中一个,在applicationIdentinterbackground
和applicationWillEnterForeground中更改调用
- (**void)applicationDidEnterBackground:(UIApplication *)application {
// Need to stop regular updates first
[self.locationManager stopUpdatingLocation];
// Only monitor significant changes
[self.locationManager startMonitoringSignificantLocationChanges];
}
- (void)applicationWillEnterForeground:(UIApplication *)application {
// 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.
[self.locationManager stopMonitoringSignificantLocationChanges];
[self.locationManager startUpdatingLocation];
}
可能您没有正确的方法,因为allowDeferredLocationUpdatesUntiltTraveled()
告诉GPS硬件在内部存储新位置,直到满足指定的距离或超时条件
从iOS开发者库:
如果您的应用程序位于前台,位置管理器不会延迟事件的传递,但会监控指定的条件。如果您的应用程序在满足条件之前移动到后台,位置管理器可能会开始延迟事件的传递
你在调试吗
如回答中所述:
只有当系统进入低功耗状态时,才会交付延迟更新。调试期间不会发生延迟更新,因为Xcode会阻止应用程序睡眠,从而阻止系统进入低功耗状态
我们需要startUpdatingLocation
使延迟的位置更新生效。删除行self.deferringUpdates=NO
问题是关于延迟的位置更新,而不是重大的位置更改。SLC不使用GPS,也没有任何地方可以延迟定位。它使用wifi和基站三角测量来监控重大变化。至少根据我的经验,SLC和DLU不能很好地协同工作。