Ios UILongPressGestureRecognitor被解雇两次

当用户长按地图超过2-4秒时，UILongPressGestureRecognitor将被触发两次。我如何确保它只会被解雇一次

func action(gestureRecognizer:UIGestureRecognizer) {

    println("long pressed on map")


override func viewDidLoad() {
    super.viewDidLoad()

    manager = CLLocationManager()
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest

    if activePlace == -1 {

        manager.requestWhenInUseAuthorization()
        manager.startUpdatingLocation()



    } else {

        var uilpgr = UILongPressGestureRecognizer(target: self, action: "action:")
        uilpgr.minimumPressDuration = 2.0
        myMap.addGestureRecognizer(uilpgr)

    }        
}

func action(gestureRecognizer:UIGestureRecognizer) {

    println("long pressed on map")
    var touchPoint = gestureRecognizer.locationInView(self.myMap)
    var newCoordinate = myMap.convertPoint(touchPoint, toCoordinateFromView: self.myMap)

    var annotation = MKPointAnnotation()
    annotation.coordinate = newCoordinate
    //annotation.title = "New Place"
    myMap.addAnnotation(annotation)

    var loc = CLLocation(latitude: newCoordinate.latitude, longitude: newCoordinate.longitude)

}

---

您必须检查手势识别器的

状态

以了解手势的开始：

func action(gestureRecognizer:UIGestureRecognizer) {
    if gestureRecognizer.state == UIGestureRecognizerState.Began {
        // ...
    }
}

---

长时间的新闻手势是连续的。当在指定的时间段（minimumPressDuration）内按下允许的手指数（numberOfTouchesRequired）且触摸未超出允许的移动范围（allowableMovement）时，手势开始（UIGestureRecognitizerStateStarted）。每当手指移动时，手势识别器将转换为“更改”状态，当任何手指抬起时，手势识别器将结束（UIgestureRecognitizerStateEnded）

试着这样做：

let longGesture = UILongPressGestureRecognizer(target : self,
 action : #selector(someFunc(gestureRecognizer:)))


func someFunc(gestureRecognizer: UILongPressGestureRecognizer){
if gestureRecognizer.state == .began {
//do something
}