Symbol dragging on ios

[martinsellergren]

On Android symbol dragging works just fine but on ios, nope (at least not for me). I guess it's not yet implemented for ios?

Related:
#130
mapbox/mapbox-annotation-extension#43

[martinsellergren]

I looked at the code to see if maybe I could fix it and it seems, dragging is implemented in iOS(?) But still not working on my device. Could this be an issue with the underlaying iOS mapbox annotation library?

[kleeb]

I feel that more features are not developed on iOS - linePattern for line styles (like dotted one) works only on Android

[lomza]

Yes, seems like neither lines or circles can be dragged on iOS either.
Issues: #750
#186

[tonnyavery]

I have found the cause but got no idea how to fix it.
Maybe some iOS expert can help?

maps/ios/Classes/MapboxMapController.swift

Line 62 in 4641f23

mapView.addGestureRecognizer(longPress)

Adding a long-press handler breaks dragging functionality completely.
Removing this doesn't help

        for recognizer in mapView.gestureRecognizers! where recognizer is UILongPressGestureRecognizer {
            longPress.require(toFail: recognizer)
        }

I guess it's something about the order of events?
Still, I can see that another long-press handler in MGLAnnotaionLayerView is correctly called, but handleDragGesture in the same class doesn't get invoked if there is a long-press handler attached on the map.

[felix-ht]

This might be related to this old issue? #156

[tonnyavery]

@felix-ht I don't think so. If I remove long press handler completely annotations become draggable. On ios long press is used to grab annotation before it starts dragging, probably some kind of events order conflict happens and pan/drag handler doesn't get invoked correctly

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tfvtti]

I'd like to fix symbol dragging on iOS. My work zone design application really needs this. Is this issue actually well understood, it looks like some debugging is still needed. Have the APIs for flutter been fleshed out yet? Anyone have an informed opinion on what effort might be required to get dragging working properly on iOS? I need to give my boss an effort estimate in order to justify the time to work on this.

[felix-ht]

its fixed on current master. The whole annotations part was completely rewritten in dart.