gistfile1.txt

NSData *styleData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"MapzenGLStyle" ofType:@"json"]];

thisCacheDir = [NSString stringWithFormat:@"%@/mapzen-vectiles",cacheDir];
MapzenSource *mzSource = [[MapzenSource alloc]
                            initWithBase:@"http://vector.mapzen.com/osm"
                            layers:@[@"all"]
                            // Note: Go get your own API key
                            apiKey:@"vector-tiles-05s8a-0"
                            sourceType:MapzenSourcePBF
                            styleData:styleData
                            styleType:MapnikMapboxGLStyle
                            viewC:baseViewC];
mzSource.minZoom = 0;
mzSource.maxZoom = 24;