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When specific advanced marker properties are set, you can monitor marker events
such as taps andgestures.
If a marker is tapped, one can see additional information such as a marker title
or snippet. One can also move draggable markers using a long press gesture.
To set descriptive text for a marker, use theGMSMarker.titleproperty.
Respond to marker events
You can respond tomarker eventsby adding
theGMSMapViewDelegateprotocol to your view and
implementing the corresponding callback. This example identifies thetitleandsnippetfor a selected marker.
When you enable thedraggableproperty users can drag markers on the map with
a long press gesture. To make a marker draggable, set theGMSMarker.draggableproperty to true.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eGoogle Maps SDK for iOS allows you to monitor marker events like taps and gestures, displaying information like title and snippet when tapped.\u003c/p\u003e\n"],["\u003cp\u003eYou can enable marker dragging using a long press gesture by setting the \u003ccode\u003eGMSMarker.draggable\u003c/code\u003e property.\u003c/p\u003e\n"],["\u003cp\u003eMarker visibility can be controlled based on the map's zoom level using the \u003ccode\u003eGMSMapViewDelegate\u003c/code\u003e and setting the \u003ccode\u003eGMSMarker.map\u003c/code\u003e property conditionally.\u003c/p\u003e\n"],["\u003cp\u003eTo respond to marker events and access details like title and snippet, implement the \u003ccode\u003eGMSMapViewDelegate\u003c/code\u003e protocol and its corresponding callback methods.\u003c/p\u003e\n"]]],["Markers' events, like taps and gestures, can be monitored by adding `GMSMapViewDelegate`. Tapped markers reveal their title and snippet, set using `GMSMarker.title`. Markers can be made draggable with `GMSMarker.draggable`, allowing movement via long press. You can control marker visibility based on zoom level by setting `GMSMarker.map` within the `GMSMapViewDelegate` callback. Implementing the delegate protocol also allows for handling custom responses to specific marker interactions.\n"],null,["When specific advanced marker properties are set, you can monitor marker events\nsuch as taps and [gestures](/maps/documentation/ios-sdk/controls#map_gestures).\nIf a marker is tapped, one can see additional information such as a marker title\nor snippet. One can also move draggable markers using a long press gesture.\n\n- To track marker events, add the [`GMSMapViewDelegate`](/maps/documentation/ios-sdk/reference/objc/Protocols/GMSMapViewDelegate) to your `view`.\n- To make a marker draggable, set the [`GMSMarker.draggable`](/maps/documentation/ios-sdk/reference/objc/Classes/GMSMarker#draggable) property.\n- To set descriptive text for a marker, use the [`GMSMarker.title`](/maps/documentation/ios-sdk/reference/objc/Classes/GMSOverlay#title) property.\n\nRespond to marker events\n\nYou can respond to [marker events](/maps/documentation/ios-sdk/events) by adding\nthe [`GMSMapViewDelegate`](/maps/documentation/ios-sdk/reference/objc/Protocols/GMSMapViewDelegate) protocol to your view and\nimplementing the corresponding callback. This example identifies the `title` and\n`snippet` for a selected marker. \n\nSwift \n\n```swift\n// MARK: GMSMapViewDelegate\n\nfunc mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -\u003e Bool {\n if let title = marker.title {\n if let snippet = marker.snippet {\n print(\"marker title: \\(title): snippet: \\(snippet)\")\n }\n }\n return true\n}\n```\n\nObjective-C \n\n```objective-c\n// MARK: GMSMapViewDelegate\n\n- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker {\n if (marker.title && marker.snippet) {\n NSLog(@\"marker with title:%@ snippet: %@\", marker.title, marker.snippet)\n }\n return YES;\n}\n```\n\nControl marker visibility by map zoom level\n\nTo control the visibility of [`GMSMarker`](/maps/documentation/ios-sdk/reference/objc/Classes/GMSMarker), implement the\n[`GMSMapViewDelegate`](/maps/documentation/ios-sdk/reference/objc/Protocols/GMSMapViewDelegate) protocol and add a condition to set\n`GMSMarker.map`. \n\nSwift \n\n```swift\n// MARK: GMSMapViewDelegate\n\nfunc mapView(_ mapView: GMSMapView, didChange position: GMSCameraPosition) {\n marker.map = position.zoom \u003e= 14 ? mapView : nil\n}\n```\n\nObjective-C \n\n```objective-c\n// MARK: GMSMapViewDelegate\n\n- (void)mapView:(GMSMapView *)mapView didChangeCameraPosition:(GMSCameraPosition *)position {\n marker.map = position.zoom \u003e= 14 ? mapView : nil;\n}\n```\n\nMake a marker draggable\n\nWhen you enable the `draggable` property users can drag markers on the map with\na long press gesture. To make a marker draggable, set the `GMSMarker.draggable`\nproperty to true. \n\nSwift \n\n```swift\nmarker.draggable = true\n```\n\nObjective-C \n\n```objective-c\nmarker.draggable = YES;\n```"]]
