Instance Method


Presents a page-based interface modally.


@nonobjc final func presentController(_ namesAndContexts: [(name: String, context: AnyObject)])



An array of tuples. Each tuple must contain the following named elements:


The name of the interface controller you want to display. In your storyboard, the name of an interface controller is stored in the object’s Identifier property, which is located in the attributes inspector. This element must not be nil.


An object to pass to the new interface controller. Use the object in this parameter to communicate important information to the new interface controller, such as the data to display or any relevant state information. You may specify nil for this element if you want but doing so is not recommended.


After calling this method, WatchKit loads and initializes the new interface controllers and animates them into position on top of the current interface controller. A modal interface slides up from the bottom of the screen and completely cover the previous interface. WatchKit displays the first interface controller in the names array initially. The user can navigate to the other interfaces by swiping horizontally.

The title of the modal interface is set to the string Cancel unless the presented interface controller explicitly changes it using the setTitle(_:) method. Tapping the title dismisses the interface automatically. To dismiss the interface programmatically, call the dismiss() method.

Always call this method from your WatchKit extension’s main thread.

See Also

Deprecated Symbols

func handleUserActivity([AnyHashable : Any]?)

Responds to Handoff–related activity.

func updateUserActivity(String, userInfo: [AnyHashable : Any]?, webpageURL: URL?)

Registers the current user activity with the system

class func reloadRootControllers(withNames: [String], contexts: [Any]?)

Loads the specified interface controllers and rebuilds the app’s page-based interface.

Text Response Key

Keys for retrieving text response information.