Loading map in background thread

[Jaroslav]

I'm using offline maps from sqlite database and loading 100Mb of maps
takes several seconds. How could I kame view controller visible with
some type of indicator while view controller is loading map? I tried
using
[self performSelectorInBackground:@selector(loadMap) withObject:nil];
in viewDidLoad and then in loadMap
[self performSelectorOnMainThread:@selector(showMap) withObject:nil
waitUntilDone:NO];
with
- (void) showMap{
self.view = mapView;
}

Map seems to be loaded but I doesn't get displayed until I exit from
this view controller and go back to it again.

Maybe someone came to solution how to show user that map is currently
loading?

[Justin R. Miller]

It seems suspect to me that your map is taking several seconds to
load. What kind of SQLite backend are you using? Is it indexed
properly?

--
Justin R. Miller
Development Seed, Inc.
jus...@developmentseed.org

[Jaroslav Ozevič]

I created maps from tiles (downloaded from OSM) using osm2mbtiles
program (https://github.com/rpcarver/osm2mbtiles). It gave me 100mb
sqlite file.
Then I use RMMBTilesTileSource as a tile source. (RMMBTilesTileSource
*source = [[RMMBTilesTileSource alloc] initWithTileSetURL:tilesURL]; )
Thats it :)

Maybe I should add some indexes manually?

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Pagarbiai,
Jaroslav Ozevič,
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[Jaroslav Oo]

Checked it now: tiles able has one index: zoom_level,tile_column,tile_row

On Feb 20, 7:11 am, Jaroslav <jaroslav.oze...@gmail.com> wrote:
> I'm using offline maps from sqlite database and loading 100Mb of maps
> takes several seconds. How could I kame view controller visible with
> some type of indicator while view controller is loading map? I tried
> using
> [self performSelectorInBackground:@selector(loadMap) withObject:nil];
> in viewDidLoad and then in loadMap
> [self performSelectorOnMainThread:@selector(showMap) withObject:nil
> waitUntilDone:NO];
> with
> - (void) showMap{
> self.view = mapView;
>
> }
>
> Map seems to be loaded but I doesn't get displayed until I exit from
> this view controller and go back to it again.
>
> Maybe someone came to solution how to show user that map is currently
> loading?

[Justin R. Miller]

That was just a hunch -- things sound ok. FWIW I have used 1GB+
MBTiles databases before without this kind of delay. Maybe profile
your app with Instruments and see where it is spending its time?

--
Justin R. Miller
Development Seed, Inc.
jus...@developmentseed.org

> > For more options, visit this group athttp://groups.google.com/group/route-me-map?hl=en.