Cached Tiles not showing - Mapbox 1.6.1 (iOS 8)

[huynhduyson]

I've been able to download offline map areas in the cache, however it seems the cache is not accessed when I turn of Wifi and cellular data. The Map Tiles are not coming up. Only the Map Tiles that were automatically cached are showing.

[Svantulden]

How do you initialize your RMTileCache? Do you use the same map source for the online/offline map? Sharing some code of your setup would be helpful.

[huynhduyson]

Thanks @Svantulden Here is my source code:

- (void)viewDidLoad {
    [super viewDidLoad];

    maxDownloadZoom = 15;
    minDownloadZoom = 9;

    [[RMConfiguration configuration] setAccessToken:@"pk.eyJ1IjoianVzdGluIiwiYSI6IlpDbUJLSUEifQ.4mG8vhelFMju6HpIY-Hi5A"];

    RMMapboxSource *tileSource  = nil;

    NSString *tileJSON = [[NSUserDefaults standardUserDefaults] objectForKey:@"tileJSON"];
    if(tileJSON){
        tileSource = [[RMMapboxSource alloc] initWithTileJSON:tileJSON];
    }
    else {
        tileSource = [[RMMapboxSource alloc] initWithMapID:@"mapbox.streets"];
    }

    if (tileSource == nil) {
        NSLog(@"The app requires a first run while online.");
    }
    else {
        map = [[RMMapView alloc] initWithFrame:self.view.bounds andTilesource:tileSource];
        map.delegate = self;
        [map setZoom:minDownloadZoom atCoordinate:map.centerCoordinate animated:false];
        map.maxZoom = maxDownloadZoom;

        map.tileCache = [[RMTileCache alloc] initWithExpiryPeriod:0];

        map.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
        [self.view addSubview:map];
    }
}

- (void)downloadCache {

    // update cached TileJSON metadata for tile source
    RMMapboxSource *source = (RMMapboxSource *)map.tileSource;
    NSString *tileJSON = source.tileJSON;
    [[NSUserDefaults standardUserDefaults] setObject:tileJSON forKey:@"tileJSON"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    map.tileCache.backgroundCacheDelegate = self;
    [map.tileCache beginBackgroundCacheForTileSource:map.tileSource
                                           southWest:map.latitudeLongitudeBoundingBox.southWest
                                           northEast:map.latitudeLongitudeBoundingBox.northEast
                                             minZoom:minDownloadZoom maxZoom:maxDownloadZoom];

}

Download Tiles in range: minimum zoom is 9, maximum zoom is 15. When I turn of Wifi and cellular data, sometime the map only show Tiles with zoom 13,14,15.

[huynhduyson]

I have found out the cause. Default RMDatabaseCache's capacity is 1000 while the number of tiles I downloaded exceed 1000. Thanks for your support.

[Svantulden]

Ah, great that you found it! That was what I needed to do as well indeed.