1 files changed, 92 insertions, 0 deletions
diff --git a/platform/ios/demo/Examples/ObjectiveC/RuntimeToggleLayerExample.m b/platform/ios/demo/Examples/ObjectiveC/RuntimeToggleLayerExample.m
new file mode 100644
index 0000000000..9f61c11d7a
--- /dev/null
+++ b/platform/ios/demo/Examples/ObjectiveC/RuntimeToggleLayerExample.m
@@ -0,0 +1,92 @@
+#import "RuntimeToggleLayerExample.h"
+@import Mapbox;
+
+NSString *const MBXExampleRuntimeToggleLayer = @"RuntimeToggleLayerExample";
+
+@interface RuntimeToggleLayerExample () <MGLMapViewDelegate>
+@property (nonatomic) MGLMapView *mapView;
+@property (nonatomic) MGLStyleLayer *contoursLayer;
+@end
+
+@implementation RuntimeToggleLayerExample
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    self.mapView = [[MGLMapView alloc] initWithFrame:self.view.bounds];
+    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];
+
+    [self addToggleButton];
+
+    // Set the delegate property of our map view to self after instantiating it
+    self.mapView.delegate = self;
+}
+
+// Wait until the style is loaded before modifying the map style
+- (void)mapView:(MGLMapView *)mapView didFinishLoadingStyle:(MGLStyle *)style {
+    [self addLayer];
+}
+
+- (void)addLayer {
+    MGLSource *source = [[MGLVectorSource alloc] initWithIdentifier:@"contours" configurationURL:[NSURL URLWithString:@"mapbox://mapbox.mapbox-terrain-v2"]];
+
+    MGLLineStyleLayer *layer = [[MGLLineStyleLayer alloc] initWithIdentifier:@"contours" source:source];
+    layer.sourceLayerIdentifier = @"contour";
+    layer.lineJoin = [MGLStyleValue valueWithRawValue:[NSValue valueWithMGLLineJoin:MGLLineJoinRound]];
+    layer.lineCap = [MGLStyleValue valueWithRawValue:[NSValue valueWithMGLLineCap:MGLLineCapRound]];
+    layer.lineColor = [MGLStyleValue valueWithRawValue:[UIColor brownColor]];
+    layer.lineWidth = [MGLStyleValue valueWithRawValue:@1];
+
+    [self.mapView.style addSource:source];
+
+    MGLStyleLayer *waterLayer = [self.mapView.style layerWithIdentifier:@"water"];
+    if (waterLayer != nil) {
+	// You can insert a layer below an existing style layer
+	[self.mapView.style insertLayer:layer belowLayer:waterLayer];
+    } else {
+	// or you can simply add it above all layers
+	[self.mapView.style addLayer:layer];
+    }
+
+    self.contoursLayer = layer;
+
+    [self showContours];
+}
+
+- (void)toggleLayer:(UIButton *)sender {
+    sender.selected = !sender.selected;
+    if (sender.selected) {
+	[self showContours];
+    } else {
+	[self hideContours];
+    }
+}
+
+- (void)showContours {
+    [self.contoursLayer setVisible:YES];
+}
+
+- (void)hideContours {
+    [self.contoursLayer setVisible:NO];
+}
+
+- (void)addToggleButton {
+    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
+    button.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
+    [button setTitle:@"Toggle Contours" forState:UIControlStateNormal];
+    [button setSelected:YES];
+    [button sizeToFit];
+    button.center = CGPointMake(self.view.center.x, 0);
+    button.frame = CGRectMake(button.frame.origin.x, self.view.frame.size.height - button.frame.size.height - 5, button.frame.size.width, button.frame.size.height);
+    [button addTarget:self action:@selector(toggleLayer:) forControlEvents:UIControlEventTouchUpInside];
+    [self.view addSubview:button];
+}
+
+@end