[Offline][iOS][Android] Add option to set maximum offline tile count

[felix-ht]

Currently there is no option to change the max offline tile count, which defaults to 6000. I added the support to set this value for iOS and android. Tested for Android and iOS, but iOS offline tiles are still defunct - #545

Would be nice if one of @n8han or @shroff could take on the review.

[shroff]

Looks great!

[anonali]

How would one go about specifying a certain tile count? Where is this parameter to be adjusted?

[felix-ht]

@anonali you can just call

await setOfflineTileCountLimit(
      yourTileLimit,
      accessToken: yourMapboxToken,
    );

from anywhere in you code as long as you import mapbox_gl in that file.

[anonali]

@anonali you can just call

await setOfflineTileCountLimit(
      yourTileLimit,
      accessToken: yourMapboxToken,
    );

from anywhere in you code as long as you import mapbox_gl in that file.

I have tried calling and setting the tile limit to 25,000 in the example app, however, I still seem to be getting an error thrown at 6000 according to the console log (calling it on the "Offline Regions" page).

Given the example app, could you please hint where and how this should be called in thus that it would work from the Offline Regions page?

As a side note, I am also getting this error: "Pack download error: Optional("The operation couldn’t be completed. HTTP status code 401")
" when trying to download the "Santiago" offline region. Any idea why that might be? Just seems to be happening with that specific offline region.

I don't think it concerns my credentials as I am using the same key to access other services successfully. I assume that this 401 error also has something to do with the offline tile count?

Thank you in advance!

EDIT:

I was able to get it working. The following is for anyone else that may find this useful:

`
int limit = 25000;

someFunction () async {
await setOfflineTileCountLimit(
limit,
accessToken: MapsDemo.ACCESS_TOKEN
);

}`