ArcGIS URLRequestBuildable.makeURLRequest() - Crash

CristhianSanchez — Tue, 06 Aug 2024 19:22:04 GMT

Hello, we have found this crash which occurs when we use the CustomTiledLayer class. We use it to render MBTiles in the map but we haven't found the cause, we are wondering if you have some idea what could be happening, here is an image with part of the stack trace:

Re: ArcGIS URLRequestBuildable.makeURLRequest() - Crash

rolson_esri — Tue, 06 Aug 2024 19:38:16 GMT

It looks like we are somehow ending up with a `nil` URL when we didn't expect to. Can you provide some reproducible code please?

Re: ArcGIS URLRequestBuildable.makeURLRequest() - Crash

CristhianSanchez — Tue, 06 Aug 2024 20:08:29 GMT

Code looks similar to this:

import ArcGIS class ArcGISMBTilesLayer { var customLayer: CustomTiledLayer static let defaultSpatialReference = SpatialReference(wkid: WKID(rawValue: 3857) ?? .webMercator)! init(mbtilesFilePath: String) { let tileInfo = TileInfo( dpi: 96, format: .png, levelsOfDetail: ArcGISMBTilesLayer.defaultLevelsOfDetail(), origin: ArcGISMBTilesLayer.defaultOrigin(), spatialReference: ArcGISMBTilesLayer.defaultSpatialReference, tileHeight: 256, tileWidth: 256 ) self.customLayer = CustomTiledLayer(tileInfo: tileInfo, fullExtent: ArcGISMBTilesLayer.defaultEnvelope()){(tileKey: TileKey) in let provider = SomeDataMBTilesProvider.getTiles(withPath: mbtilesFilePath) let tileY = Int(pow(2.0, Double(tileKey.level))) - tileKey.row - 1 guard tileY >= 0 else { return nil } let image: UIImage? = ImageFromTile.tile(with: provider, x: UInt(tileKey.column), y: UInt(tileY), zoom: UInt(tileKey.level)) if let image = image, let data = image.pngData() { return data } else { return nil } } self.customLayer.noDataTileBehavior = .blank } static func defaultEnvelope() -> Envelope { return Envelope.init( xMin: -2.003750834278E7, yMin: -2.003750834278E7, xMax: 2.003750834278E7, yMax: 2.003750834278E7, spatialReference: defaultSpatialReference ) } static func defaultLevelsOfDetail() -> [LevelOfDetail] { return [ LevelOfDetail.init(level: 0, resolution: 156543.0339279998, scale: 0.91657527591555E8), LevelOfDetail.init(level: 1, resolution: 78271.5169639999, scale: 2.95828763795777E8), LevelOfDetail.init(level: 2, resolution: 39135.7584820001, scale: 1.47914381897889E8), LevelOfDetail.init(level: 3, resolution: 19567.8792409999, scale: 7.3957190948944E7), LevelOfDetail.init(level: 4, resolution: 9783.93962049996, scale: 3.6978595474472E7), LevelOfDetail.init(level: 5, resolution: 4891.96981024998, scale: 1.8489297737236E7), LevelOfDetail.init(level: 6, resolution: 2445.98490512499, scale: 9244648.868618), LevelOfDetail.init(level: 7, resolution: 1222.99245256249, scale: 4622324.434309), LevelOfDetail.init(level: 8, resolution: 611.49622628138, scale: 2311162.217155), LevelOfDetail.init(level: 9, resolution: 305.748113140558, scale: 1155581.108577), LevelOfDetail.init(level: 10, resolution: 152.874056570411, scale: 577790.554289), LevelOfDetail.init(level: 11, resolution: 76.4370282850732, scale: 288895.277144), LevelOfDetail.init(level: 12, resolution: 38.2185141425366, scale: 144447.638572), LevelOfDetail.init(level: 13, resolution: 19.1092570712683, scale: 72223.819286), LevelOfDetail.init(level: 14, resolution: 9.55462853563415, scale: 36111.909643), LevelOfDetail.init(level: 15, resolution: 4.77731426794937, scale: 18055.954822), LevelOfDetail.init(level: 16, resolution: 2.38865713397468, scale: 9027.977411), LevelOfDetail.init(level: 17, resolution: 1.19432856685505, scale: 4513.988705), LevelOfDetail.init(level: 18, resolution: 0.597164283559817, scale: 2256.994353), LevelOfDetail.init(level: 19, resolution: 0.298582141647617, scale: 1128.497176), LevelOfDetail.init(level: 20, resolution: 0.149291070823808, scale: 564.248588), LevelOfDetail.init(level: 21, resolution: 0.074645535411904, scale: 282.124294), LevelOfDetail.init(level: 22, resolution: 0.037322767705952, scale: 141.062147), LevelOfDetail.init(level: 23, resolution: 0.018661383985268, scale: 70.531074) ] } static func defaultOrigin() -> Point { return Point.init(x: -2.003750834278E7, y: 2.003750834278E7, spatialReference: defaultSpatialReference) } } //Some class to add layer to map operational layers class SomeClassToAddMapLayerToMap { func setupLayer(filePath: String) { let mbTilesLayer = ArcGISMBTilesLayer(mbtilesFilePath: filePath) let operationalLayer = mbTilesLayer.customLayer addLayers(from: [operationalLayer]) } func addLayers(from layers: [Layer]) { viewModel?.selectedMap?.addOperationalLayers(layers) } }

Re: ArcGIS URLRequestBuildable.makeURLRequest() - Crash

rolson_esri — Tue, 06 Aug 2024 20:43:10 GMT

Unfortunately there is missing code for function calls in your code. What would be really helpful is a self-contained reproducible example. Then we can debug and fix the issue.

Re: ArcGIS URLRequestBuildable.makeURLRequest() - Crash

Nicholas-Furness — Fri, 09 Aug 2024 20:13:55 GMT

Hello @CristhianSanchez. Please could you DM me with some more details? We'd like to reproduce this and see if we can work out a solution. We'll need some data and a self-contained reproducer project.

Thank you!

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ArcGIS URLRequestBuildable.makeURLRequest() - Crash

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Re: ArcGIS URLRequestBuildable.makeURLRequest() - Crash

Re: ArcGIS URLRequestBuildable.makeURLRequest() - Crash