GestureRecognizer

public class GestureRecognizer 

Initializers

init(target:action:)

Initializes an allocated gesture-recognizer object with a target and an action selector.

public init<Target: AnyObject>(target: Target,
                                 action: @escaping (Target) -> () -> Void) 

The valid signatures for action are:

• (Target) -> () -> Void aka ()

• (Target) -> (_: GestureRecognizer) -> Void aka (_: GestureRecognizer)

Although the signature permits nullable types, the values may not be nil.

init(target:action:)

public init<Target: AnyObject>(target: Target,
                                 action: @escaping (Target) -> (_: GestureRecognizer) -> Void) 

init()

public /* convenience */ init() 

Properties

delegate

The delegate of the gesture recognizer.

public weak var delegate: GestureRecognizerDelegate?

numberOfTouches

Returns the number of touches involved in the gesture represented by the receiver.

public private(set) var numberOfTouches: Int = 0

state

The current state of the gesture recognizer.

public var state: GestureRecognizer.State = .possible

view

The view the gesture recognizer is attached to.

public internal(set) var view: View?

isEnabled

A boolean property that indicates whether the gesture recognizer is enabled.

public var isEnabled: Bool = true

buttonMask

A bit mask of the button (or buttons) in the gesture represented by the receiver.

public private(set) var buttonMask: Event.ButtonMask = []

modifierFlags

Constants that indicate which modifier keys are pressed.

public private(set) var modifierFlags: KeyModifierFlags = []

name

The name associated with the gesture recognizer.

public var name: String?

Methods

addTarget(_:action:)

Adds a target and an action to a gesture-recognizer object.

public func addTarget<Target: AnyObject>(_ target: Target,
                                           action: @escaping (Target) -> () -> Void) 

The valid signatures for action are:

• (Target) -> () -> Void aka ()

• (Target) -> (_: GestureRecognizer) -> Void aka (_: GestureRecognizer)

addTarget(_:action:)

public func addTarget<Target: AnyObject>(_ target: Target,
                                           action: @escaping (Target) -> (_: GestureRecognizer) -> Void) 

removeTarget(_:action:)

Removes a target and an action from a gesture-recognizer object.

public func removeTarget<Target: AnyObject>(_ target: Target,
                                              action: @escaping (Target) -> () -> Void) 

removeTarget(_:action:)

public func removeTarget<Target: AnyObject>(_ target: Target,
                                              action: @escaping (Target) -> (_: GestureRecognizer) -> Void) 

location(in:)

Returns the point computed as the location in a given view of the gesture represented by the receiver.

public func location(in view: View?) -> Point 

location(ofTouch:in:)

Returns the location of one of the gesture’s touches in the local coordinate system of a given view.

public func location(ofTouch touchIndex: Int, in view: View?) -> Point 

shouldReceive(_:)

public func shouldReceive(_ event: Event) -> Bool