MGLCalloutView

@protocol MGLCalloutView <NSObject>

A protocol for a UIView subclass that displays information about a selected annotation near that annotation.

To receive updates from an object that conforms to the MGLCalloutView protocol, use the optional methods available in the MGLCalloutViewDelegate protocol.

representedObject

An object conforming to the MGLAnnotation protocol whose details this callout view displays.

Declaration

Objective-C

@property (nonatomic, strong, readwrite)
id<MGLAnnotation> _Nonnull representedObject;

leftAccessoryView

A view that the user may tap to perform an action. This view is conventionally positioned on the left side of the callout view.

Declaration

Objective-C

@property (nonatomic, strong, readwrite) UIView *_Nonnull leftAccessoryView;

Swift

var leftAccessoryView: UnsafeMutablePointer<Int32> { get set }

rightAccessoryView

A view that the user may tap to perform an action. This view is conventionally positioned on the right side of the callout view.

Declaration

Objective-C

@property (nonatomic, strong, readwrite) UIView *_Nonnull rightAccessoryView;

Swift

var rightAccessoryView: UnsafeMutablePointer<Int32> { get set }

delegate

An object conforming to the MGLCalloutViewDelegate method that receives messages related to the callout view’s interactive subviews.

Declaration

Objective-C

@property (nonatomic, weak, readwrite)
id<MGLCalloutViewDelegate> _Nullable delegate;

Swift

weak var delegate: MGLCalloutViewDelegate? { get set }

-presentCalloutFromRect:inView:constrainedToView:animated:

Unavailable

Use -presentCalloutFromRect:inView:constrainedToRect:animated: instead.

Presents a callout view by adding it to view and pointing at the given rect of view’s bounds. Constrains the callout to the bounds of the given view.

Declaration

Objective-C

- (void)presentCalloutFromRect:(CGRect)rect
                    inView:(nonnull UIView *)view
         constrainedToView:(nonnull UIView *)constrainedView
                  animated:(BOOL)animated;

-presentCalloutFromRect:inView:constrainedToRect:animated:

Presents a callout view by adding it to view and pointing at the given rect of view’s bounds. Constrains the callout to the rect in the space of view.

Declaration

Objective-C

- (void)presentCalloutFromRect:(CGRect)rect
                    inView:(nonnull UIView *)view
         constrainedToRect:(CGRect)constrainedRect
                  animated:(BOOL)animated;

Swift

func presentCallout(fromRect rect: Any!, inView view: Any!, constrainedToRect constrainedRect: Any!, animated: Bool)

-dismissCalloutAnimated:

Dismisses the callout view.

Declaration

Objective-C

- (void)dismissCalloutAnimated:(BOOL)animated;

Swift

func dismissCallout(animated: Bool)

-marginInsetsHintForPresentationFromRect:

If implemented, should provide margins to expand the rect the callout is presented from.

These are used to determine positioning. Currently only the top and bottom properties of the return value are used. For example, { .top = -50.0, .left = -10.0, .bottom = 0.0, .right = -10.0 } indicates a 50 point margin above the presentation origin rect (and 10 point margins to the left and the right) in which the callout is assumed to be displayed.

There are no assumed defaults for these margins, as they should be calculated from the callout that is to be presented. For example, SMCalloutView generates the top margin from the callout height, but the left and right margins from a minimum width that the callout should have.

Declaration

Objective-C

- (UIEdgeInsets)marginInsetsHintForPresentationFromRect:(CGRect)rect;

Swift

optional func marginInsetsHintForPresentation(from rect: Any!) -> Any!

Parameters

rect

Rect that the callout is presented from. This should be the same as the one passed in -[MGLCalloutView presentCalloutFromRect:inView:constrainedToRect:animated:]

Return Value

UIEdgeInsets representing the margins. Values should be negative.

anchoredToAnnotation

A Boolean value indicating whether the callout view should be anchored to the corresponding annotation. You can adjust the callout view’s precise location by overriding -[UIView setCenter:]. The callout view will not be anchored to the annotation if this optional property is unimplemented.

Declaration

Objective-C

@optional
@property (nonatomic, assign, unsafe_unretained, readonly,
      getter=isAnchoredToAnnotation) BOOL anchoredToAnnotation;

Swift

optional var isAnchoredToAnnotation: Bool { get }

dismissesAutomatically

A Boolean value indicating whether the callout view should be dismissed automatically when the map view’s viewport changes. Note that a single tap on the map view still dismisses the callout view regardless of the value of this property. The callout view will be dismissed if this optional property is unimplemented.

Declaration

Objective-C

@optional
@property (nonatomic, assign, unsafe_unretained, readonly)
BOOL dismissesAutomatically;

Swift

optional var dismissesAutomatically: Bool { get }