asset://style.json loading is broken

[friedbunny]

It appears to be impossible to load local assets — such as styles — using the asset://foo.json URL scheme. This is a result of path problems, which we used to be able to work around using ../../ to get back to the main app bundle.

We've started pushing online styles exclusively (mapbox://styles/user/hash), but it should still be possible to load styles locally.

Follows on from #1208, which was specific to sprite loading.

/cc @incanus @1ec5 @jfirebaugh @kkaefer

[incanus]

Not-best-practice-but-perhaps-interesting-stopgap I was working on elsewhere for another purpose:

https://github.com/incanus/StyleServer

Tap the map view to toggle the style background color black and white. Fairly crappy since we don't yet have a native live style API, but a proof of concept nonetheless.

[1ec5]

I’m guessing this is because mbgl::platform::assetRoot() doesn’t take advantage of -[NSBundle(MGLAdditions) mgl_resourceBundlePath], which incidentally should use a dummy class instead of MGLMapView as a canary.

[mitchellporter]

@friedbunny

We've started pushing online styles exclusively (mapbox://styles/user/hash)

I'm trying to use a custom Mapbox Studio Beta map style in Xcode and can't get it to work. Have tried setting StyleID in Interface Builder, even removed chunks at a time, but still doesn't load properly:

Have also tried loading in code:

 mapView = MGLMapView(frame: view.bounds,
            styleURL: NSURL(string: "mapbox://styles/companyname/randomIDstring"))

Always receive the following error in Xcode 7.1.1 on OSX 10.11.1 with Cocoapods Mapbox iOS SDK 2.1.2: [ERROR] {Map}[Setup]: loading style failed: HTTP status code 403

Appreciate the help.

[friedbunny]

@mitchellporter I don't see any GL styles in your Mapbox account, so the 403 error represents the fact that the style you're trying to load doesn't exist or, if it does exist, your access token does not have access to it.

[mitchellporter]

@friedbunny Yep, you're correct. I was using the API key for an old account sorry about that.