Limit map zoom level on sdk v2.3.2

[marxonline]

Hello,
May I know if its possible to limit zoom on the map beyond certain levels ? I could not find a way referring to the api documentation.

My problem is the basemap layer provides detail upto 11 levels (i cant control this one) & the sublayer I add on provides only upto 7 levels of detail. because of this I want to limit the zoom on sublayer by 7 levels. Please provide me instructions on how to achieve this or a workaround. I'm using sdk v2.3.2

I tried some of the undocumented api calls mentioned in some of the old forum threads but they dont seem to work with current sdk.

Thanks & Regards,
Marx

[RickJones · Accepted solution]

What I've done is catch the zoom event

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(respondToZoom:) name:@"MapDidEndZooming" object:nil];

and reset the scale if it's too low


- (void)respondToZoom:(NSNotification*)notification {
   self.scale = self.mapView.mapScale;

    if (self.scale < 500) {
        // zoom out
        AGSEnvelope *e = self.mapView.visibleArea.envelope;
        AGSPoint *pt = e.center;
       
        [self.mapView zoomToScale:500 withCenterPoint:pt animated:YES];
    }
}

[marxonline]

What I've done is catch the zoom event

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(respondToZoom:) name:@"MapDidEndZooming" object:nil];

and reset the scale if it's too low


- (void)respondToZoom:(NSNotification*)notification {
   self.scale = self.mapView.mapScale;

    if (self.scale < 500) {
        // zoom out
        AGSEnvelope *e = self.mapView.visibleArea.envelope;
        AGSPoint *pt = e.center;
       
        [self.mapView zoomToScale:500 withCenterPoint:pt animated:YES];
    }
}

Thanks alot Rick. this seems to be working. I hope they will include an api in future to get rid of the stretchy effect as well 🙂

regards,
Marx