Add observer to detect tileset errors

Examples.xcodeproj/project.pbxproj

@@ -96,6 +96,8 @@
 		64CF97101DF224E400C3C27B /* ThirdPartyVectorStyleExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 64CF970F1DF224E400C3C27B /* ThirdPartyVectorStyleExample.swift */; };
 		64CF97121DF224F600C3C27B /* RasterImageryExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 64CF97111DF224F600C3C27B /* RasterImageryExample.swift */; };
 		64CF97171DF2251500C3C27B /* RasterImageryExample.m in Sources */ = {isa = PBXBuildFile; fileRef = 64CF97161DF2251500C3C27B /* RasterImageryExample.m */; };
+		8F2D8826252737EA0040D381 /* DetectTilesetErrorExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F2D8825252737EA0040D381 /* DetectTilesetErrorExample.swift */; };
+		8F2D882C252738660040D381 /* DetectTilesetErrorExample.m in Sources */ = {isa = PBXBuildFile; fileRef = 8F2D882B252738660040D381 /* DetectTilesetErrorExample.m */; };
 		960A21611D344F9F00BB348B /* DraggableAnnotationViewExample.m in Sources */ = {isa = PBXBuildFile; fileRef = 960A21601D344F9F00BB348B /* DraggableAnnotationViewExample.m */; };
 		961962911C581700002D3DAB /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 961962901C581700002D3DAB /* main.m */; };
 		961962941C581700002D3DAB /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 961962931C581700002D3DAB /* AppDelegate.m */; };
@@ -301,6 +303,12 @@
 		64CF97111DF224F600C3C27B /* RasterImageryExample.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = RasterImageryExample.swift; sourceTree = "<group>"; };
 		64CF97161DF2251500C3C27B /* RasterImageryExample.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RasterImageryExample.m; sourceTree = "<group>"; };
 		64CF97191DF2252C00C3C27B /* RasterImageryExample.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = RasterImageryExample.h; sourceTree = "<group>"; };
+		7556D44879C1E2866B0355B8 /* Pods-ExamplesTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-ExamplesTests.release.xcconfig"; path = "Pods/Target Support Files/Pods-ExamplesTests/Pods-ExamplesTests.release.xcconfig"; sourceTree = "<group>"; };
+		7692D1D792EB3849E8754E6B /* Pods_ExamplesUITests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_ExamplesUITests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		7823ECBC65EEAAC3EA0B6E42 /* Pods-DocsCode.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-DocsCode.release.xcconfig"; path = "Pods/Target Support Files/Pods-DocsCode/Pods-DocsCode.release.xcconfig"; sourceTree = "<group>"; };
+		8F2D8825252737EA0040D381 /* DetectTilesetErrorExample.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DetectTilesetErrorExample.swift; sourceTree = "<group>"; };
+		8F2D882B252738660040D381 /* DetectTilesetErrorExample.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = DetectTilesetErrorExample.m; sourceTree = "<group>"; };
+		8F2D8831252739000040D381 /* DetectTilesetErrorExample.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = DetectTilesetErrorExample.h; sourceTree = "<group>"; };
 		960A215F1D344F9F00BB348B /* DraggableAnnotationViewExample.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = DraggableAnnotationViewExample.h; sourceTree = "<group>"; };
 		960A21601D344F9F00BB348B /* DraggableAnnotationViewExample.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = DraggableAnnotationViewExample.m; sourceTree = "<group>"; };
 		96115A661CAD4E1C000963B8 /* OfflinePackExample.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OfflinePackExample.h; sourceTree = "<group>"; };
@@ -855,6 +863,7 @@
 				969E7FDB1D25C31700663F84 /* UserTrackingModesExample.h */,
 				64BBDAFB1DF24DD700BB705D /* WebAPIDataExample.h */,
 				583BAE092481B0220079BB57 /* InsetMapExample.h */,
+				8F2D8831252739000040D381 /* DetectTilesetErrorExample.h */,
 				C67C17E12507FC0C004112DE /* LocationPrivacyExample.h */,
 			);
 			path = Headers;
@@ -876,6 +885,7 @@
 			isa = PBXGroup;
 			children = (
 				A42F4A4C22EF9A79005097F3 /* CacheManagementExample.m */,
+				8F2D882B252738660040D381 /* DetectTilesetErrorExample.m */,
 			);
 			name = Advanced;
 			sourceTree = "<group>";
@@ -884,6 +894,7 @@
 			isa = PBXGroup;
 			children = (
 				A42F4A5022EF9ACD005097F3 /* CacheManagementExample.swift */,
+				8F2D8825252737EA0040D381 /* DetectTilesetErrorExample.swift */,
 			);
 			name = Advanced;
 			sourceTree = "<group>";
@@ -1135,10 +1146,21 @@
 			files = (
 			);
 			inputPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-DocsCode/Pods-DocsCode-frameworks.sh",
+				"${PODS_ROOT}/Mapbox-iOS-SDK/dynamic/Mapbox.framework",
+				"${PODS_ROOT}/Mapbox-iOS-SDK/dynamic/Mapbox.framework.dSYM",
+				"${PODS_ROOT}/Mapbox-iOS-SDK/dynamic/93C58D95-90B9-30C8-8F60-4BDE32FD7E8E.bcsymbolmap",
+				"${PODS_ROOT}/Mapbox-iOS-SDK/dynamic/BB87D8DD-493F-37AA-BD21-2BC609B8311B.bcsymbolmap",
+				"${BUILT_PRODUCTS_DIR}/MapboxMobileEvents/MapboxMobileEvents.framework",
 				"$(TARGET_BUILD_DIR)/$(INFOPLIST_PATH)",
 			);
 			name = "Insert Mapbox Access Token";
 			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Mapbox.framework",
+				"${DWARF_DSYM_FOLDER_PATH}/Mapbox.framework.dSYM",
+				"${BUILT_PRODUCTS_DIR}/93C58D95-90B9-30C8-8F60-4BDE32FD7E8E.bcsymbolmap",
+				"${BUILT_PRODUCTS_DIR}/BB87D8DD-493F-37AA-BD21-2BC609B8311B.bcsymbolmap",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/MapboxMobileEvents.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
@@ -1375,6 +1397,7 @@
 				646B62971DEF6DAF000AA523 /* ShowHideLayerExample.swift in Sources */,
 				05FA539B1FE2FA00001F3D7D /* StudioClassicStyleExample.m in Sources */,
 				3E9EF27C209CFD460053D1D7 /* HeatmapExample.swift in Sources */,
+				8F2D8826252737EA0040D381 /* DetectTilesetErrorExample.swift in Sources */,
 				583BAE082481AFF50079BB57 /* InsetMapExample.m in Sources */,
 				1F07015C225422B90045E061 /* LabelPlacementExample.swift in Sources */,
 				CA3B162E2098CA7E005C087B /* TestingSupport.m in Sources */,
@@ -1436,6 +1459,7 @@
 				968247271C5C1DC700494AB8 /* CameraAnimationExample.m in Sources */,
 				CA39B2BF209B881300D37037 /* BuildingLightExample+UITesting.m in Sources */,
 				961962D51C583FDC002D3DAB /* ExamplesContainerViewController.m in Sources */,
+				8F2D882C252738660040D381 /* DetectTilesetErrorExample.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Examples/Examples.h

@@ -30,6 +30,7 @@ extern NSString *const MBXExampleCustomCalloutView;
 extern NSString *const MBXExampleDDSCircleLayer;
 extern NSString *const MBXExampleDefaultCallout;
 extern NSString *const MBXExampleDefaultStyles;
+extern NSString *const MBXExampleDetectTilesetError;
 extern NSString *const MBXExampleDraggableAnnotationView;
 extern NSString *const MBXExampleFeatureSelection;
 extern NSString *const MBXExampleFormattingExpression;

Examples/Examples.m

@@ -95,6 +95,7 @@ + (NSArray *)groups {
             @"title": @"Advanced",
             @"examples": @[
                     @{@"className": MBXExampleCacheManagement, @"title": @"Use cache management methods"},
+                    @{@"className": MBXExampleDetectTilesetError, @"title": @"Detect tileset errors"},
             ]
         },
         @{

Examples/ObjectiveC/DetectTilesetErrorExample.m

@@ -0,0 +1,80 @@
+#import "DetectTilesetErrorExample.h"
+@import Mapbox;
+
+NSString *const MBXExampleDetectTilesetError = @"DetectTilesetErrorExample";
+
+
+@interface MyObserver: MGLObserver
+@end
+
+@implementation MyObserver
+- (void) notifyWithEvent:(MGLEvent *)event {
+    [super notifyWithEvent:event];
+    NSDictionary* data = (NSDictionary*) event.data;
+    if (!data) {
+        return;
+    }
+    NSDictionary* request = (NSDictionary*)[data valueForKey: @"request"];
+    if (!request) {
+        return;
+    }
+    NSString* dataSource = [data valueForKey: @"data-source"];
+    if (![dataSource isEqual: @"network"]) {
+        return;
+    }
+    NSDictionary* response = (NSDictionary*)[data valueForKey: @"response"];
+    if (!response) {
+        return;
+    }
+    NSDictionary* error = [response valueForKey: @"error"];
+    NSLog(@"network request: %@, errors: %@", request, error);
+}
+@end
+
+
+@interface DetectTilesetErrorExample () <MGLMapViewDelegate>
+@property (nonatomic) MGLMapView *mapView;
+@property (nonatomic) MGLStyleLayer *contoursLayer;
+@property (nonatomic) MyObserver *observer;
+@end
+
+@implementation DetectTilesetErrorExample
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    self.mapView = [[MGLMapView alloc] initWithFrame:self.view.bounds];
+    self.observer = [[MyObserver alloc] init];
+    [self.mapView subscribeForObserver: self.observer event: MGLEventTypeResourceRequest];
+    self.mapView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+
+    // Set the map's center coordinate
+    [self.mapView setCenterCoordinate:CLLocationCoordinate2DMake(37.745395, -119.594421)
+                zoomLevel:11
+                 animated:NO];
+
+    [self.view addSubview:self.mapView];
+
+    // Set the delegate property of our map view to self after instantiating it
+    self.mapView.delegate = self;
+}
+
+- (void)dealloc {
+    if (self.observer) {
+        [self.mapView unsubscribeForObserver: self.observer];
+    }
+}
+
+// Wait until the style is loaded before modifying the map style
+- (void)mapView:(MGLMapView *)mapView didFinishLoadingStyle:(MGLStyle *)style {
+    [self addLayer];
+}
+
+- (void)addLayer {
+    MGLSource *source = [[MGLVectorTileSource alloc] initWithIdentifier:@"contours" configurationURL:[NSURL URLWithString:@"mapbox://badtilesource"]];
+    MGLLineStyleLayer *layer = [[MGLLineStyleLayer alloc] initWithIdentifier:@"contours" source:source];
+    [self.mapView.style addSource:source];
+    [self.mapView.style addLayer:layer];
+}
+
+@end

Examples/ObjectiveC/Headers/DetectTilesetErrorExample.h

@@ -0,0 +1,14 @@
+//
+//  DetectTilesetErrorExample.h
+//  Examples
+//
+//  Created by Takuto Suzuki on 2020/10/02.
+//  Copyright © 2020 Mapbox. All rights reserved.
+//
+
+
+#import <UIKit/UIKit.h>
+
+@interface DetectTilesetErrorExample : UIViewController
+
+@end

Examples/Swift/DetectTilesetErrorExample.swift

@@ -0,0 +1,67 @@
+import Mapbox
+
+@objc(DetectTilesetErrorExample_Swift)
+
+class DetectTilesetErrorExample_Swift: UIViewController, MGLMapViewDelegate {
+    var mapView: MGLMapView!
+    var contoursLayer: MGLStyleLayer?
+    var observer: MyObserver?
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        mapView = MGLMapView(frame: view.bounds)
+        observer = MyObserver()
+        mapView.subscribe(for: observer!, event: .resourceRequest)
+        mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+
+        mapView.setCenter(CLLocationCoordinate2D(latitude: 37.745395, longitude: -119.594421), zoomLevel: 11, animated: false)
+        view.addSubview(mapView)
+
+        mapView.delegate = self
+    }
+
+    /// We strongly recommending unsubscribing from the observer
+    deinit {
+        if let observer = observer {
+            mapView.unsubscribe(for: observer)
+        }
+    }
+
+    // Wait until the style is loaded before modifying the map style
+    func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) {
+        addLayer(to: style)
+    }
+
+    func addLayer(to style: MGLStyle) {
+        let source = MGLVectorTileSource(identifier: "contours", configurationURL: NSURL(string: "mapbox://badtilesource")! as URL)
+        let layer = MGLLineStyleLayer(identifier: "contours", source: source)
+        style.addSource(source)
+        style.addLayer(layer)
+    }
+}
+
+class MyObserver: MGLObserver {
+    override func notify(with event: MGLEvent) {
+        super.notify(with: event)
+        guard let data = event.data as? [String: Any] else {
+            return
+        }
+        guard let request = data["request"] as? [String: Any] else {
+            return
+        }
+        guard let dataSource = data["data-source"] as? String else {
+            return
+        }
+        if dataSource != "network" {
+            return
+        }
+        guard let response = data["response"] as? [String: Any] else {
+            return
+        }
+        guard let error = response["error"] as? [String: Any] else {
+            return
+        }
+        print("network request: \(request), errors: \(error)")
+    }
+}

Examples/Swift/ShowHideLayerExample.swift

@@ -5,6 +5,7 @@ import Mapbox
 class ShowHideLayerExample_Swift: UIViewController, MGLMapViewDelegate {
     var mapView: MGLMapView!
     var contoursLayer: MGLStyleLayer?
+    var observer: MGLObserver?
 
     override func viewDidLoad() {
         super.viewDidLoad()
@@ -26,7 +27,7 @@ class ShowHideLayerExample_Swift: UIViewController, MGLMapViewDelegate {
     }
 
     func addLayer(to style: MGLStyle) {
-        let source = MGLVectorTileSource(identifier: "contours", configurationURL: NSURL(string: "mapbox://mapbox.mapbox-terrain-v2")! as URL)
+        let source = MGLVectorTileSource(identifier: "contours", configurationURL: NSURL(string: "mapbox://mapbox.mapbox-terrain-v2ssss")! as URL)
 
         let layer = MGLLineStyleLayer(identifier: "contours", source: source)
         layer.sourceLayerIdentifier = "contour"