[ios] Add description strings to constituent classes

platform/darwin/include/MGLGeometry.h

@@ -80,7 +80,7 @@ NS_INLINE BOOL MGLCoordinateBoundsIsEmpty(MGLCoordinateBounds bounds) {
 
 /** Returns a formatted string for the given coordinate bounds. */
 NS_INLINE NSString *MGLStringFromCoordinateBounds(MGLCoordinateBounds bounds) {
-    return [NSString stringWithFormat:@"{{%.1f, %.1f}, {%.1f, %.1f}}",
+    return [NSString stringWithFormat:@"{ sw = {%.1f, %.1f}, ne = {%.1f, %.1f}}",
             bounds.sw.latitude, bounds.sw.longitude,
             bounds.ne.latitude, bounds.ne.longitude];
 }

platform/darwin/src/MGLMapCamera.mm

@@ -94,7 +94,7 @@
 
 - (NSString *)description
 {
-    return [NSString stringWithFormat:@"<%@ %p centerCoordinate:%f, %f altitude:%.0fm heading:%.0f° pitch:%.0f°>",
+    return [NSString stringWithFormat:@"<%@: %p; centerCoordinate = %f, %f; altitude = %.0fm; heading = %.0f°; pitch = %.0f°>",
             NSStringFromClass([self class]), (void *)self, _centerCoordinate.latitude, _centerCoordinate.longitude, _altitude, _heading, _pitch];
 }
 

platform/darwin/src/MGLMultiPoint.mm

@@ -128,4 +128,10 @@ mbgl::Color MGLColorObjectFromCGColorRef(CGColorRef cgColor) {
     return mbgl::ShapeAnnotation::Properties();
 }
 
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<%@: %p; count = %lu; bounds = %@>",
+            NSStringFromClass([self class]), (void *)self, (unsigned long)_count, MGLStringFromCoordinateBounds(_bounds)];
+}
+
 @end

platform/darwin/src/MGLPointAnnotation.m

@@ -4,4 +4,13 @@
 
 @synthesize coordinate;
 
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<%@: %p; title = %@; subtitle = %@; coordinate = %f, %f>",
+            NSStringFromClass([self class]), (void *)self,
+            self.title ? [NSString stringWithFormat:@"\"%@\"", self.title] : self.title,
+            self.subtitle ? [NSString stringWithFormat:@"\"%@\"", self.subtitle] : self.subtitle,
+            coordinate.latitude, coordinate.longitude];
+}
+
 @end

platform/ios/src/MGLUserLocation.m

@@ -71,4 +71,16 @@ NS_ASSUME_NONNULL_END
     return (_title ? _title : @"You Are Here");
 }
 
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<%@: %p; location = %f, %f; updating = %@; altitude = %.0fm; heading = %.0f°; title = %@; subtitle = %@>",
+            NSStringFromClass([self class]), (void *)self,
+            self.location.coordinate.latitude, self.location.coordinate.longitude,
+            self.updating ? @"yes" : @"no",
+            self.location.altitude,
+            self.heading.trueHeading,
+            self.title ? [NSString stringWithFormat:@"\"%@\"", self.title] : self.title,
+            self.subtitle ? [NSString stringWithFormat:@"\"%@\"", self.subtitle] : self.subtitle];
+}
+
 @end