IssueTracker

I'm attempting to animate the map to a certain point (marker) with a certain zoom level while respecting a custom UIEdgeInset, as I want my marker to be in the center of the map view not obscured by a custom info view.

Here's the code I think should work:

func animateMap(centeringOn coordinate: CLLocationCoordinate2D, bottomOffset: CGFloat? = nil) {
    let previousMaxZoom = mapView.maxZoom
    mapView.setMinZoom(mapView.minZoom, maxZoom: 17)
    let coordinateBounds = GMSCoordinateBounds(coordinate: coordinate, coordinate: coordinate)
    let bottomInset = (mapView.bounds.size.height - fabs(bottomOffset ?? 0)) / 2.0 + fabs(bottomOffset ?? 0)
    let insets = UIEdgeInsets(top: 0, left: 0, bottom: bottomInset, right: 0)
    let cameraUpdate = GMSCameraUpdate.fit(coordinateBounds, with: insets)
    mapView.animate(with: cameraUpdate)
    mapView.setMinZoom(mapView.minZoom, maxZoom: previousMaxZoom)
}

The calculation of the bottom inset should be correct, as the bottomOffset passed in is the height of the info view. From what I can tell, this offset should be enough to push the marker up so it appears centered in the remaining view. e.g. A mapView height of 509 and a bottomOffset of 190 gives me a remaining view height of 319, half of which added to the bottomOffset is 349.5. If the marker was inset this much from the bottom of the view, it would appear centered in the visible map area. However, what I see is that the marker is only moved a fraction of that distance and appears only slightly above center. Bizarrely, multiplying the bottom of the UIEdgeInsets by 7.5 gets me an approximately correct value. I've tried a variety of ways of accomplishing this, but nothing seems to work correctly.


Operating system version: 10.0/10.1
Google Maps SDK for iOS version: 2.1.0
Hardware model: Simulator

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