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#import "DrawingAPolygonExample.h"
@import Mapbox;
NSString *const MBXExampleDrawingAPolygon = @"DrawingAPolygonExample";
@interface DrawingAPolygonExample () <MGLMapViewDelegate>
@property (nonatomic) MGLMapView *mapView;
@end
@implementation DrawingAPolygonExample
- (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(45.520486, -122.673541)
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)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// Draw the polygon after the map has initialized
[self drawShape];
}
- (void)drawShape {
// Create a coordinates array to hold all of the coordinates for our shape.
CLLocationCoordinate2D coordinates[] = {
CLLocationCoordinate2DMake(45.522585, -122.685699),
CLLocationCoordinate2DMake(45.534611, -122.708873),
CLLocationCoordinate2DMake(45.530883, -122.678833),
CLLocationCoordinate2DMake(45.547115, -122.667503),
CLLocationCoordinate2DMake(45.530643, -122.660121),
CLLocationCoordinate2DMake(45.533529, -122.636260),
CLLocationCoordinate2DMake(45.521743, -122.659091),
CLLocationCoordinate2DMake(45.510677, -122.648792),
CLLocationCoordinate2DMake(45.515008, -122.664070),
CLLocationCoordinate2DMake(45.502496, -122.669048),
CLLocationCoordinate2DMake(45.515369, -122.678489),
CLLocationCoordinate2DMake(45.506346, -122.702007),
CLLocationCoordinate2DMake(45.522585, -122.685699),
};
NSUInteger numberOfCoordinates = sizeof(coordinates) / sizeof(CLLocationCoordinate2D);
// Create our shape with the formatted coordinates array
MGLPolygon *shape = [MGLPolygon polygonWithCoordinates:coordinates count:numberOfCoordinates];
// Add the shape to the map
[self.mapView addAnnotation:shape];
}
- (CGFloat)mapView:(MGLMapView *)mapView alphaForShapeAnnotation:(MGLShape *)annotation {
// Set the alpha for shape annotations to 0.5 (half opacity)
return 0.5f;
}
- (UIColor *)mapView:(MGLMapView *)mapView strokeColorForShapeAnnotation:(MGLShape *)annotation {
// Set the stroke color for shape annotations
return [UIColor whiteColor];
}
- (UIColor *)mapView:(MGLMapView *)mapView fillColorForPolygonAnnotation:(MGLPolygon *)annotation {
// Mapbox cyan fill color
return [UIColor colorWithRed:59.0f/255.0f green:178.0f/255.0f blue:208.0f/255.0f alpha:1.0f];
}
@end
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