1 files changed, 92 insertions, 0 deletions
diff --git a/platform/ios/app/MBXContextSnapshotViewController.m b/platform/ios/app/MBXContextSnapshotViewController.m
new file mode 100644
index 0000000000..09640ca95b
--- /dev/null
+++ b/platform/ios/app/MBXContextSnapshotViewController.m
@@ -0,0 +1,92 @@
+#import "MBXContextSnapshotViewController.h"
+#import <Mapbox/Mapbox.h>
+
+@interface MBXContextSnapshotViewController () <MGLMapViewDelegate>
+@property MGLMapView *mapView;
+@property UIButton *button;
+@property UIImageView *imageView;
+@end
+
+@implementation MBXContextSnapshotViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    _mapView = [[MGLMapView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height / 2) styleURL:[MGLStyle lightStyleURL]];
+    _mapView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+
+
+    [_mapView setCenterCoordinate:_mapView.centerCoordinate zoomLevel:1 animated:NO];
+    [self.view addSubview:_mapView];
+
+    _button = [[UIButton alloc] initWithFrame:CGRectMake(_mapView.frame.origin.x + 100, _mapView.frame.origin.y + 45, 170, 30)];
+    _button.layer.cornerRadius = 15;
+    _button.backgroundColor = [UIColor blueColor];
+    [_button setTitle:@"Create snapshot" forState:UIControlStateNormal];
+    [_button addTarget:self action:@selector(createSnapshot) forControlEvents:UIControlEventTouchUpInside];
+    [self.view addSubview:_button];
+
+    _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height / 2, self.view.bounds.size.width, self.view.bounds.size.height / 2)];
+    _imageView.backgroundColor = [UIColor blackColor];
+    _imageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+    [self.view addSubview:_imageView];
+}
+
+- (void)createSnapshot {
+
+    MGLMapSnapshotOptions *options = [[MGLMapSnapshotOptions alloc] initWithStyleURL:_mapView.styleURL camera:_mapView.camera size:_mapView.bounds.size];
+
+    options.zoomLevel = _mapView.zoomLevel;
+
+    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(_imageView.center.x - 30, _imageView.center.y - 30, 60, 60)];
+    [self.view addSubview:indicator];
+    [indicator startAnimating];
+
+    CGRect imageRect = _imageView.bounds;
+
+    __block MGLMapSnapshotter *snapshotter = [[MGLMapSnapshotter alloc] initWithOptions:options];
+
+    [snapshotter startWithOverlayHandler:^(MGLMapSnapshotOverlay * _Nullable snapshotOverlay)  {
+        //  Overlays red square over snapshot (but below attribution)
+//        CGContextSetFillColorWithColor(snapshotOverlay.context, [UIColor.greenColor CGColor]);
+//        CGContextSetAlpha(snapshotOverlay.context, 0.2);
+//        CGContextAddRect(snapshotOverlay.context, imageRect);
+//        CGContextFillRect(snapshotOverlay.context, imageRect);
+
+        // Slick drawing, but pushes attribution out of the way
+        CGContextSetStrokeColorWithColor(snapshotOverlay.context, [UIColor.redColor CGColor]);
+        CGContextTranslateCTM(snapshotOverlay.context, imageRect.size.width / 2, imageRect.size.height / 2);
+        BOOL first = YES;
+        CGFloat length = 256;
+
+        for (int i = 1; i <= length; i++)
+        {
+            CGContextRotateCTM(snapshotOverlay.context, M_PI / 2);
+
+            if (first) {
+                CGContextMoveToPoint(snapshotOverlay.context, length, 50);
+                first = NO;
+            } else {
+                CGContextAddLineToPoint(snapshotOverlay.context, length, 50);
+            }
+
+            length *= 0.99;
+        }
+
+        CGContextStrokePath(snapshotOverlay.context);
+
+    } completionHandler:^(MGLMapSnapshot * _Nullable snapshot, NSError * _Nullable error) {
+        if (error != nil) {
+            NSLog(@"Unable to create a map snapshot.");
+        } else if (snapshot != nil) {
+            // Add the map snapshot's image to the image view.
+            [indicator stopAnimating];
+            self.imageView.image = snapshot.image;
+        }
+
+        snapshotter = nil;
+    }];
+}
+
+@end
+