adding a new example FilterMapSymbolsExample

Examples.xcodeproj/project.pbxproj

@@ -80,6 +80,10 @@
 		3EC92DB71E78C431001D0503 /* metro-line.geojson in Resources */ = {isa = PBXBuildFile; fileRef = 3EC92DB61E78C431001D0503 /* metro-line.geojson */; };
 		3ED403411E006B5200230C95 /* CameraFlyToExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3ED403401E006B5200230C95 /* CameraFlyToExample.swift */; };
 		3ED403481E006BE800230C95 /* CameraFlyToExample.m in Sources */ = {isa = PBXBuildFile; fileRef = 3ED403471E006BE800230C95 /* CameraFlyToExample.m */; };
+		58AC6B9C23478646002665E1 /* mapbox_access_token in Resources */ = {isa = PBXBuildFile; fileRef = 58AC6B9B23478646002665E1 /* mapbox_access_token */; };
+		58AC6B9E23478BA6002665E1 /* FilterMapSymbolsExample.m in Sources */ = {isa = PBXBuildFile; fileRef = 58AC6B9D23478BA6002665E1 /* FilterMapSymbolsExample.m */; };
+		58AC6BA023478D81002665E1 /* FilterMapSymbolsExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 58AC6B9F23478D81002665E1 /* FilterMapSymbolsExample.swift */; };
+		58AC6BE82347D47B002665E1 /* iOS.geojson in Resources */ = {isa = PBXBuildFile; fileRef = 58AC6BE72347D47B002665E1 /* iOS.geojson */; };
 		60E0DCA0CEED683C3A4F18F2 /* Pods_Examples.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9EC12D8F1A97963D68BFA871 /* Pods_Examples.framework */; };
 		646B62971DEF6DAF000AA523 /* ShowHideLayerExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 646B62961DEF6DAF000AA523 /* ShowHideLayerExample.swift */; };
 		646B629C1DEF6DF1000AA523 /* ShowHideLayerExample.m in Sources */ = {isa = PBXBuildFile; fileRef = 646B629B1DEF6DF1000AA523 /* ShowHideLayerExample.m */; };
@@ -270,6 +274,11 @@
 		3ED403471E006BE800230C95 /* CameraFlyToExample.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CameraFlyToExample.m; sourceTree = "<group>"; };
 		532FB53EE0142E4DAC3FB49B /* Pods-Shared-Examples.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Shared-Examples.release.xcconfig"; path = "Pods/Target Support Files/Pods-Shared-Examples/Pods-Shared-Examples.release.xcconfig"; sourceTree = "<group>"; };
 		589ABF8859560819F8B431C7 /* Pods-ExamplesTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-ExamplesTests.debug.xcconfig"; path = "Pods/Target Support Files/Pods-ExamplesTests/Pods-ExamplesTests.debug.xcconfig"; sourceTree = "<group>"; };
+		58AC6B9B23478646002665E1 /* mapbox_access_token */ = {isa = PBXFileReference; lastKnownFileType = text; path = mapbox_access_token; sourceTree = "<group>"; };
+		58AC6B9D23478BA6002665E1 /* FilterMapSymbolsExample.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = FilterMapSymbolsExample.m; sourceTree = "<group>"; };
+		58AC6B9F23478D81002665E1 /* FilterMapSymbolsExample.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FilterMapSymbolsExample.swift; sourceTree = "<group>"; };
+		58AC6BE62347D38A002665E1 /* FilterMapSymbols.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = FilterMapSymbols.h; sourceTree = "<group>"; };
+		58AC6BE72347D47B002665E1 /* iOS.geojson */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = iOS.geojson; sourceTree = "<group>"; };
 		646B62961DEF6DAF000AA523 /* ShowHideLayerExample.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ShowHideLayerExample.swift; sourceTree = "<group>"; };
 		646B629B1DEF6DF1000AA523 /* ShowHideLayerExample.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ShowHideLayerExample.m; sourceTree = "<group>"; };
 		646B629E1DEF6DFD000AA523 /* ShowHideLayerExample.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ShowHideLayerExample.h; sourceTree = "<group>"; };
@@ -315,7 +324,6 @@
 		962B450D1D1C8520007B7454 /* AnnotationViewExample.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AnnotationViewExample.h; sourceTree = "<group>"; };
 		962B450E1D1C8520007B7454 /* AnnotationViewExample.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AnnotationViewExample.m; sourceTree = "<group>"; };
 		9637341B2139B30A00BE4B39 /* .swiftlint.yml */ = {isa = PBXFileReference; lastKnownFileType = text; path = .swiftlint.yml; sourceTree = SOURCE_ROOT; };
-		964CB5171E445AE1004549EA /* mapbox_access_token */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = mapbox_access_token; sourceTree = SOURCE_ROOT; };
 		968247011C5BDCBB00494AB8 /* StudioClassicStyleExample.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StudioClassicStyleExample.h; sourceTree = "<group>"; };
 		968247111C5C0F0F00494AB8 /* DefaultCalloutExample.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = DefaultCalloutExample.h; sourceTree = "<group>"; };
 		968247251C5C1DC700494AB8 /* CameraAnimationExample.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CameraAnimationExample.h; sourceTree = "<group>"; };
@@ -492,6 +500,7 @@
 				3EBCD7121DC28240001E342F /* PointConversionExample.swift */,
 				646B62961DEF6DAF000AA523 /* ShowHideLayerExample.swift */,
 				3EBCD7151DC28240001E342F /* UserTrackingModesExample.swift */,
+				58AC6B9F23478D81002665E1 /* FilterMapSymbolsExample.swift */,
 			);
 			name = "User interaction";
 			sourceTree = "<group>";
@@ -586,6 +595,7 @@
 				96BAED2D1FE304DD00A58BEB /* PointConversionExample.m */,
 				646B629B1DEF6DF1000AA523 /* ShowHideLayerExample.m */,
 				969E7FDC1D25C31700663F84 /* UserTrackingModesExample.m */,
+				58AC6B9D23478BA6002665E1 /* FilterMapSymbolsExample.m */,
 			);
 			name = "User interaction";
 			sourceTree = "<group>";
@@ -676,6 +686,7 @@
 		961962831C581700002D3DAB = {
 			isa = PBXGroup;
 			children = (
+				58AC6B9B23478646002665E1 /* mapbox_access_token */,
 				9619628E1C581700002D3DAB /* Examples */,
 				961962A81C581700002D3DAB /* ExamplesTests */,
 				961962B31C581700002D3DAB /* ExamplesUITests */,
@@ -727,7 +738,6 @@
 				9637341B2139B30A00BE4B39 /* .swiftlint.yml */,
 				9691AAAA1C5AB546006A58C6 /* Examples-Bridging-Header.h */,
 				961962901C581700002D3DAB /* main.m */,
-				964CB5171E445AE1004549EA /* mapbox_access_token */,
 			);
 			name = "Supporting Files";
 			sourceTree = "<group>";
@@ -753,6 +763,7 @@
 		9682471B1C5C123B00494AB8 /* Files */ = {
 			isa = PBXGroup;
 			children = (
+				58AC6BE72347D47B002665E1 /* iOS.geojson */,
 				DD5939E51E6778480009BEB2 /* clustering.xcassets */,
 				3EC92DB61E78C431001D0503 /* metro-line.geojson */,
 				3E25C5DE2056E7E2005B031E /* nps-icons.xcassets */,
@@ -810,6 +821,7 @@
 				3E18060E1EAA800A004DB131 /* UserLocationAnnotationExample.h */,
 				969E7FDB1D25C31700663F84 /* UserTrackingModesExample.h */,
 				64BBDAFB1DF24DD700BB705D /* WebAPIDataExample.h */,
+				58AC6BE62347D38A002665E1 /* FilterMapSymbols.h */,
 			);
 			path = Headers;
 			sourceTree = "<group>";
@@ -1080,13 +1092,15 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				58AC6BE82347D47B002665E1 /* iOS.geojson in Resources */,
 				3E25C5DF2056E7E2005B031E /* nps-icons.xcassets in Resources */,
 				3E4574ED1FA3D8F1000C8CF1 /* radar.gif in Resources */,
 				1F0701632255789D0045E061 /* missing_icon.json in Resources */,
 				DDF9432B1E5DEACC00545D0F /* ports.geojson in Resources */,
 				3EC92DB71E78C431001D0503 /* metro-line.geojson in Resources */,
 				9619629F1C581700002D3DAB /* LaunchScreen.storyboard in Resources */,
 				DD5939E61E6778480009BEB2 /* clustering.xcassets in Resources */,
+				58AC6B9C23478646002665E1 /* mapbox_access_token in Resources */,
 				9619629C1C581700002D3DAB /* Assets.xcassets in Resources */,
 				1F07016522557B0B0045E061 /* icons.xcassets in Resources */,
 				075AFB7823393DBA0091FF0A /* example.geojson in Resources */,
@@ -1357,6 +1371,7 @@
 				3E52ACD31EE8D8AF0056242C /* LiveDataExample.m in Sources */,
 				3EA5AA041FAD2EC7007073C0 /* StaticSnapshotExample.swift in Sources */,
 				05FA53A91FE2FB46001F3D7D /* CustomCalloutView.m in Sources */,
+				58AC6BA023478D81002665E1 /* FilterMapSymbolsExample.swift in Sources */,
 				05FA53A31FE2FA1E001F3D7D /* LineStyleLayerExample.m in Sources */,
 				3E44BA55203B54120072DE4B /* MultipleImagesExample.swift in Sources */,
 				3E1806101EAA800A004DB131 /* UserLocationAnnotationExample.m in Sources */,
@@ -1384,6 +1399,7 @@
 				DDF943291E5DE63300545D0F /* ClusteringExample.m in Sources */,
 				3E44BA58203B54260072DE4B /* MultipleImagesExample.m in Sources */,
 				3EBCD7171DC28240001E342F /* DefaultCalloutExample.swift in Sources */,
+				58AC6B9E23478BA6002665E1 /* FilterMapSymbolsExample.m in Sources */,
 				64BBDAFD1DF24DEB00BB705D /* WebAPIDataExample.m in Sources */,
 				055ABCC31EFB14AE0063BACA /* PolygonPatternExample.swift in Sources */,
 				646B62AE1DEF7155000AA523 /* LineStyleLayerExample.swift in Sources */,

Examples/Examples.h

@@ -31,6 +31,7 @@ extern NSString *const MBXExampleDefaultCallout;
 extern NSString *const MBXExampleDefaultStyles;
 extern NSString *const MBXExampleDraggableAnnotationView;
 extern NSString *const MBXExampleFeatureSelection;
+extern NSString *const MBXExampleFilterMapSymbols;
 extern NSString *const MBXExampleFormattingExpression;
 extern NSString *const MBXExampleHeatmap;
 extern NSString *const MBXExampleImageSource;

Examples/Examples.m

@@ -58,6 +58,7 @@ + (NSArray *)groups {
                     @{@"className": MBXExampleShowHideLayer, @"title": @"Show and hide a layer"},
                     @{@"className": MBXExampleFeatureSelection, @"title": @"Select a feature within a layer"},
                     @{@"className": MBXExampleUserTrackingModes, @"title": @"Switch between user tracking modes"},
+                    @{@"className": MBXExampleFilterMapSymbols, @"title": @"Filter locations marked by symbols on a map"},
             ]
         },
         @{

Examples/Files/iOS.geojson

@@ -0,0 +1,67 @@
+{
+  "type": "FeatureCollection",
+  "features": [{
+    "type": "Feature",
+    "properties": {
+      "icon": "theatre"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.038659, 38.931567]
+    }
+  }, {
+    "type": "Feature",
+    "properties": {
+      "icon": "theatre"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.003168, 38.894651]
+    }
+  }, {
+    "type": "Feature",
+    "properties": {
+      "icon": "bar"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.090372, 38.881189]
+    }
+  }, {
+    "type": "Feature",
+    "properties": {
+      "icon": "bicycle"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.052477, 38.943951]
+    }
+  }, {
+    "type": "Feature",
+    "properties": {
+      "icon": "music"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.031706, 38.914581]
+    }
+  }, {
+    "type": "Feature",
+    "properties": {
+      "icon": "music"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.020945, 38.878241]
+    }
+  }, {
+    "type": "Feature",
+    "properties": {
+      "icon": "music"
+    },
+    "geometry": {
+      "type": "Point",
+      "coordinates": [-77.007481, 38.876516]
+    }
+  }]
+}

Examples/ObjectiveC/FilterMapSymbolsExample.m

@@ -0,0 +1,112 @@
+
+#import "FilterMapSymbols.h"
+
+NSString *const MBXExampleFilterMapSymbols = @"FilterMapSymbolsExample";
+
+@import Mapbox;
+@interface FilterMapSymbolsExample () <MGLMapViewDelegate>
+
+@property (nonatomic) MGLMapView *mapView;
+@property (nonatomic) MGLSymbolStyleLayer *symbolLayer;
+@property (nonatomic) MGLStyle *style;
+
+
+@end
+
+
+@implementation FilterMapSymbolsExample
+
+- (void)viewDidLoad {
+[super viewDidLoad];
+
+ self.mapView = [[MGLMapView alloc] initWithFrame: CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
+ self.mapView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+
+ // Set the map's initial style, center coordinate, and zoom level
+ self.mapView.styleURL = [NSURL URLWithString:@"mapbox://styles/zizim/ck12h05if04ha1co4qr1ra9l2"];
+ [self.mapView setCenterCoordinate:CLLocationCoordinate2DMake(38.897435, -77.039679)
+ zoomLevel:11
+ animated:NO];
+    _mapView.delegate = self;
+ [self.view addSubview:self.mapView];
+
+    [self toggleSet];
+
+}
+
+-(void)toggleSet {
+    // Create a UISegmentedControl to toggle between map styles
+    UISegmentedControl *styleToggle =[[UISegmentedControl alloc] initWithItems:@[@"theatre", @"bar", @"music", @"biking"]];
+    styleToggle.translatesAutoresizingMaskIntoConstraints = NO;
+    styleToggle.tintColor = [UIColor colorWithRed:0.976 green:0.843 blue:0.831 alpha:1];
+    styleToggle.backgroundColor = [UIColor colorWithRed:0.09 green:0.568 blue:0.514 alpha:0.56];
+    styleToggle.layer.cornerRadius = 4;
+    styleToggle.clipsToBounds = YES;
+    [self.view insertSubview:styleToggle aboveSubview:self.mapView];
+    [styleToggle addTarget:self action:@selector(changeStyle:) forControlEvents:UIControlEventValueChanged];
+
+    // Configure autolayout constraints for the UISegmentedControl to align
+    // at the bottom of the map view and above the Mapbox logo and attribution
+    NSMutableArray *constraints = [NSMutableArray array];
+
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:styleToggle attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self.mapView attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:1.0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:styleToggle attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.mapView.logoView attribute:NSLayoutAttributeTop multiplier:1 constant:-20]];
+
+    [self.view addConstraints:constraints];
+}
+
+
+- (void)mapView:(MGLMapView *)mapView didFinishLoadingStyle:(MGLStyle *)style {
+
+ NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"iOS" ofType:@"geojson"]];
+
+
+   MGLShapeSource *source = [[MGLShapeSource alloc] initWithIdentifier:@"icons" URL:url options:@{}];
+   [style addSource:source];
+
+    self.symbolLayer = [[MGLSymbolStyleLayer alloc] initWithIdentifier:@"icons" source:source];
+
+// Create a stops dictionary with keys that are possible values for 'POITYPE', paired with icon images that will represent those features.
+    NSDictionary *stops = @{
+@"theatre": [NSExpression expressionForConstantValue:@"theatre-15"],
+ @"bar": [NSExpression expressionForConstantValue:@"alcohol-shop-15"],
+ @"music": [NSExpression expressionForConstantValue:@"music-15"],
+ @"bicycle":[NSExpression expressionForConstantValue:@"bicycle-15"]
+    };
+
+// Use the stops dictionary to assign an icon based on the "icon" for each feature.
+ self.symbolLayer.iconImageName = [NSExpression expressionWithFormat:@"FUNCTION(%@, 'valueForKeyPath:', icon)", stops];
+
+    NSLog(@"%@", stops);
+
+
+[style addLayer:_symbolLayer];
+}
+
+// Change the map style based on the selected index of the UISegmentedControl
+- (void)changeStyle:(UISegmentedControl *)sender {
+switch(sender.selectedSegmentIndex){
+            case 0:
+            NSLog(@"%@", @"ummm");
+
+            self.symbolLayer.iconImageName = [NSExpression expressionForConstantValue:@"theatre-15"];
+            self.symbolLayer.predicate = [NSPredicate predicateWithFormat:@"icon = 'theatre'"];
+
+                    break;
+            case 1:
+            _symbolLayer.iconImageName =[NSExpression expressionForConstantValue:@"alcohol-shop-15"];
+            _symbolLayer.predicate = [NSPredicate predicateWithFormat:@"icon = 'bar'"];
+            break;
+            case 2:
+            _symbolLayer.iconImageName = [NSExpression expressionForConstantValue:@"music-15"];
+            _symbolLayer.predicate =[NSPredicate predicateWithFormat:@"icon = 'music'"];
+            break;
+            case 3:
+            _symbolLayer.iconImageName = [NSExpression expressionForConstantValue:@"bicycle-15"];
+            _symbolLayer.predicate =[NSPredicate predicateWithFormat:@"icon = 'bicycle'"];
+                    break;
+            }
+}
+
+
+@end

Examples/ObjectiveC/Headers/FilterMapSymbols.h

@@ -0,0 +1,14 @@
+//
+//  FilterMapSymbols.h
+//  Examples
+//
+//  Created by ZiZi Miles on 10/4/19.
+//  Copyright © 2019 Mapbox. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FilterMapSymbolsExample : UIViewController
+
+
+@end