# UIMainMenuSystem The main menu system. ``` @MainActor class UIMainMenuSystem ``` ## Topics ### Accessing the main menu system [`class var shared: UIMainMenuSystem`](/documentation/UIKit/UIMainMenuSystem/shared) The shared main menu system. ### Configuring a main menu system [`func setBuildConfiguration(UIMainMenuSystem.Configuration, buildHandler: ((any UIMenuBuilder) -> Void)?)`](/documentation/UIKit/UIMainMenuSystem/setBuildConfiguration(_:buildHandler:)) [`- (void) setBuildConfiguration:(UIMainMenuSystemConfiguration *) configuration buildHandler:(void (^)(idbuilder)) buildHandler;`](/documentation/UIKit/UIMainMenuSystem/setBuildConfiguration:buildHandler:) Specifies that the main menu system should be built using the specified configuration. A build handler can be optionally provided, which the main menu system will use instead of calling `-buildMenuWithBuilder:`. Setting this will invalidate and rebuild the main menu system. Ideally it should be set once, and as early as possible, preferably in `-application:didFinishLaunchingWithOptions:`. Subsequent rebuilds of the main menu system will continue to use this `configuration` and `buildHandler`. It is a developer error to set the `configuration` while the main menu system is building. Doing so will assert. [`class Configuration`](/documentation/UIKit/UIMainMenuSystem/Configuration) A configuration for the main menu system. You can specify whether or not certain elements are present in the initial main menu, as well as a block to build the menu using a UIMenuBuilder. ### Inspecting a configuration of find elements [`class FindElementGroupConfiguration`](/documentation/UIKit/UIMenuSystem/FindElementGroupConfiguration) Represents a configuration for find elements, should they be present. You don’t create one of these directly. A configuration is provided as part of a `UIMainMenuSystemConfiguration`. [`enum Style`](/documentation/UIKit/UIMenuSystem/FindElementGroupConfiguration/Style-swift.enum) Represents a preference for the structure of Find elements in the main menu. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol) [`CVarArg`](/documentation/Swift/CVarArg) [`Equatable`](/documentation/Swift/Equatable) [`Hashable`](/documentation/Swift/Hashable) [`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible) ### Inherits From [`UIMenuSystem`](/documentation/UIKit/UIMenuSystem) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)