Attach compass gesture recognizer to compass view

Fixes #3099.

CHANGELOG.md

@@ -23,6 +23,10 @@ Known issues:
 
 ## iOS master
 
+- Fixed an issue preventing the compass from responding to taps after the compass is moved programmatically. ([#3116](https://github.com/mapbox/mapbox-gl-native/pull/3116))
+
+## iOS 3.0.0
+
 - If you install this SDK via CocoaPods, CocoaPods version 0.38.0 or above is required. ([#2132](https://github.com/mapbox/mapbox-gl-native/pull/2132))
 - The `styleID` property has been removed from MGLMapView. Instead, set the `styleURL` property to an NSURL in the form `mapbox://styles/STYLE_ID`. If you previously set the style ID in Interface Builder’s Attributes inspector, delete the `styleID` entry from the User Defined Runtime Attributes section of the Identity inspector, then set the new “Style URL” inspectable to a value in the form `mapbox://styles/STYLE_ID`. ([#2632](https://github.com/mapbox/mapbox-gl-native/pull/2632))
 - Default styles such as Streets are no longer bundled with the SDK; instead, they are loaded at runtime from the style API on mapbox.com. As always, you can use these default styles with any valid access token, and Streets continues to be `MGLMapView`’s initial style. The `bundledStyleURLs` property on `MGLMapView` has been deprecated in favor of several class methods on `MGLStyle` that provide direct access to the default styles. ([#2746](https://github.com/mapbox/mapbox-gl-native/pull/2746))

platform/ios/MGLMapView.mm

@@ -292,10 +292,11 @@ std::chrono::steady_clock::duration durationInSeconds(float duration)
     _compassView.accessibilityLabel = @"Compass";
     _compassView.frame = CGRectMake(0, 0, _compassView.image.size.width, _compassView.image.size.height);
     _compassView.alpha = 0;
+    _compassView.userInteractionEnabled = YES;
+    [_compassView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleCompassTapGesture:)]];
     UIView *container = [[UIView alloc] initWithFrame:CGRectZero];
     [container addSubview:_compassView];
     container.translatesAutoresizingMaskIntoConstraints = NO;
-    [container addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleCompassTapGesture:)]];
     [self addSubview:container];
 
     // setup interaction