[iOS]How can I stop moving the map immediately after I stop gesturing?

[FeiXueKK]

RT

[majsty]

I fixed this by:

• adding a UIPanGestureRecognizer to my WhirlyGlobeViewController's view
• adding a MaplyCoordinate var that is used to keep track of where the user's gesture ends - I called this forcedCenter
• the action of the UIPanGestureRecogniser checks the velocity when the gesture ends, and if it's less than 50px/second it sets forcedCenter. Code if it helps:

@IBAction func didPan(_ sender: Any) {
    if self.panGestureRecognizer.state == .ended {
        let velocity = self.panGestureRecognizer.velocity(in: self.globe.view)
        guard abs(velocity.x) < 50 && abs(velocity.y) < 50 else { return }
        self.forcedCenter = self.globe.getPosition()
    }
}

• globeViewController(_:, didMove:) keeps firing, but it's suppressed like so:

func globeViewController(_ viewC: WhirlyGlobeViewController, didMove corners: UnsafeMutablePointer<MaplyCoordinate>) {
    if let forcedCenter = self.forcedCenter {
        viewC.setPosition(forcedCenter)
    }
}

• finally, clear out forcedCenter when the globe eventually stops moving:

func globeViewController(_ viewC: WhirlyGlobeViewController, didStopMoving corners: UnsafeMutablePointer<MaplyCoordinate>, userMotion: Bool) {
    self.forcedCenter = nil
}

[mousebird]

Nice!