GMSOverlay Class Reference

GMSOverlay Class Reference

Overview

GMSOverlay is an abstract class that represents some overlay that may be attached to a specific GMSMapView.

It may not be instantiated directly; instead, instances of concrete overlay types should be created directly (such as GMSMarker, GMSPolyline, and GMSPolygon).

This supports the NSCopying protocol; [overlay_ copy] will return a copy of the overlay type, but with map set to nil.

Inherited by GMSCircle, GMSGroundOverlay, GMSMarker, GMSPolygon, and GMSPolyline.

Properties

NSString * title
 Title, a short description of the overlay.
GMSMapViewmap
 The map this overlay is on.
BOOL tappable
 If this overlay should cause tap notifications.
int zIndex
 Higher zIndex value overlays will be drawn on top of lower zIndex value tile layers and overlays.
id userData
 Overlay data.

Property Documentation

- (NSString*) title [read, write, copy]

Title, a short description of the overlay.

Some overlays, such as markers, will display the title on the map. The title is also the default accessibility text.

- (GMSMapView*) map [read, write, assign]

The map this overlay is on.

Setting this property will add the overlay to the map. Setting it to nil removes this overlay from the map. An overlay may be active on at most one map at any given time.

- (BOOL) tappable [read, write, assign]

If this overlay should cause tap notifications.

Some overlays, such as markers, will default to being tappable.

- (int) zIndex [read, write, assign]

Higher zIndex value overlays will be drawn on top of lower zIndex value tile layers and overlays.

Equal values result in undefined draw ordering. Markers are an exception that regardless of zIndex, they will always be drawn above tile layers and other non-marker overlays; they are effectively considered to be in a separate z-index group compared to other overlays.

- (id) userData [read, write, assign]

Overlay data.

You can use this property to associate an arbitrary object with this overlay. Google Maps SDK for iOS neither reads nor writes this property.

Note that userData should not hold any strong references to any Maps objects, otherwise a retain cycle may be created (preventing objects from being released).

Kirim masukan tentang...

Maps SDK for iOS
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