Databases
StackOverflow2013
Postsdbo
PORequesting iPhone location whilst in background?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PORequesting iPhone location whilst in background?
    primarykey
    data
    text
    <p>Simple question ... I have an application that records a users location at 30second intervals (using an NSTimer) it works perfectly until the application goes "inactive" and the NStimer stops. As a consequence I am looking for options to maintain my location interval (30secs) whilst still being able to record fairly accurate location data (within 100m accuracy).</p> <ul> <li><p><strong>Option_001, Brute Force:</strong> Let CLLocationManager, startUpdatingLocation run all the time using UIBackgroundModes = "location". Not recommended, drains battery. Regularity upon request, Accuracy approx. 10-65m. Might just be the only realistic option.</p></li> <li><p><strong>Option_002, SLC:</strong> I could use Significant Location Change but the frequency of location updates is pretty poor (not to mention accuracy). This is particularly true if the application is running in a rural or wilderness area with limited numbers of cell towers. Regularity unknown, Accuracy approx. 500m</p></li> <li><p><strong>Option_003, Hybrid:</strong> I could use Significant Location Change (SLC) in the background as an indicator of "significant" movement and then request an GPS location based on kCLLocationAccuracyBest. This would work but the SLC events are not going to arrive at anywhere near 30second intervals (particularly when walking). Regularity unknown, Accuracy approx. 10-50m.</p></li> <li><p><strong>Option_004, Something else?</strong> any ideas would be much appreciated.</p></li> </ul> <hr> <p><strong>NOTE:</strong> <em>I thought I had this working because when you press [LOCK] on an iPhone (connected via USB) applicationWillResignActive is called but NSTimers do not stop. If you try the same with the iPhone un-connected (i.e. as the phone would be in normal use) the NSTimers stop almost immediately after applicationWillResignActive is called.</em> </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USfuzzygoat
    1. USfuzzygoat
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PORequesting iPhone location whilst in background?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PORequesting iPhone location whilst in background?
      1. USfuzzygoat
      1. VTBountyStart
    3. VO
      singulars
      1. PORequesting iPhone location whilst in background?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COJust curious on what kind of app do you have that you need my location every 30 seconds?
      singulars
      1. PORequesting iPhone location whilst in background?
      1. USBlack Frog
    2. COSort of the like the breadcrumb example project from Apple, only I don't want to keep CLLocationManager running all the time, just take a sample every 30 secs or so (thats about every 50m at average walking speed)
      singulars
      1. PORequesting iPhone location whilst in background?
      1. USfuzzygoat
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload