Always display the marker regardless of collision, and hide any
CollisionBehaviorOptionalAndHidesLowerPriority markers or labels that would overlap with the
marker.
Display the marker only if it does not overlap with other markers. Does not includeGMSCollisionBehaviorRequired. If two markers of this type would overlap, the one with the
higher zIndex is shown. Collision rules for markers with the same zIndex is undefined.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-27 UTC."],[[["\u003cp\u003e\u003ccode\u003eGMSCollisionBehavior\u003c/code\u003e controls how markers interact with each other and map labels, prioritizing required markers over optional ones and higher \u003ccode\u003ezIndex\u003c/code\u003e values.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGMSCollisionBehaviorRequired\u003c/code\u003e ensures a marker always displays, regardless of potential overlaps.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGMSCollisionBehaviorRequiredAndHidesOptional\u003c/code\u003e prioritizes the marker, hiding any optional markers or labels it overlaps.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGMSCollisionBehaviorOptionalAndHidesLowerPriority\u003c/code\u003e displays the marker only if it doesn't overlap with required markers or those with a higher \u003ccode\u003ezIndex\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,["# GoogleMaps Framework Reference\n\nGMSCollisionBehavior\n====================\n\n enum GMSCollisionBehavior : NSInteger {}\n\nHow markers interact with other markers and regular labels. Defaults to\n`GMSCollisionBehaviorRequired`.\n\nMarker collisions occur when coordinates intersect.\n\nPriority is defined as:\n1) Required \\\u003e Optional\n2) zIndex: higher zIndex \\\u003e lower zIndex\n\nBeyond this, it is undefined which marker will show if both are optional and have the same\nzIndex.\nRegular map labels are the lowest priority.\n- `\n ``\n ``\n `\n\n ### [GMSCollisionBehaviorRequired](#/c:@E@GMSCollisionBehavior@GMSCollisionBehaviorRequired)\n\n `\n ` \n Always display the marker regardless of collision. This is the default behavior.\n Has no impact on whether any other markers or basemap labels show. \n\n #### Declaration\n\n Swift \n\n case required = 0\n\n Objective-C \n\n GMSCollisionBehaviorRequired\n\n- `\n ``\n ``\n `\n\n ### [GMSCollisionBehaviorRequiredAndHidesOptional](#/c:@E@GMSCollisionBehavior@GMSCollisionBehaviorRequiredAndHidesOptional)\n\n `\n ` \n Always display the marker regardless of collision, and hide any\n CollisionBehaviorOptionalAndHidesLowerPriority markers or labels that would overlap with the\n marker. \n\n #### Declaration\n\n Swift \n\n case requiredAndHidesOptional = 1\n\n Objective-C \n\n GMSCollisionBehaviorRequiredAndHidesOptional\n\n- `\n ``\n ``\n `\n\n ### [GMSCollisionBehaviorOptionalAndHidesLowerPriority](#/c:@E@GMSCollisionBehavior@GMSCollisionBehaviorOptionalAndHidesLowerPriority)\n\n `\n ` \n Display the marker only if it does not overlap with other markers. Does not include\n [GMSCollisionBehaviorRequired](../Enums/GMSCollisionBehavior.html#/c:@E@GMSCollisionBehavior@GMSCollisionBehaviorRequired). If two markers of this type would overlap, the one with the\n higher zIndex is shown. Collision rules for markers with the same zIndex is undefined. \n\n #### Declaration\n\n Swift \n\n case optionalAndHidesLowerPriority = 2\n\n Objective-C \n\n GMSCollisionBehaviorOptionalAndHidesLowerPriority"]]
