Created
May 27, 2014 14:18
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Restrict MKMapView to specific region
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| - (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated | |
| { | |
| if (!self.manuallyChangingMap) { | |
| BOOL updateRegion = NO; | |
| MKCoordinateRegion restrictedRegion = [self restrictedRegion]; | |
| if ((mapView.region.span.latitudeDelta > restrictedRegion.span.latitudeDelta * 4) || (mapView.region.span.longitudeDelta > restrictedRegion.span.longitudeDelta * 4) ) { | |
| updateRegion = YES; | |
| } | |
| if (fabs(mapView.region.center.latitude - restrictedRegion.center.latitude) > restrictedRegion.span.latitudeDelta) { | |
| updateRegion = YES; | |
| } | |
| if (fabs(mapView.region.center.longitude - restrictedRegion.center.longitude) > restrictedRegion.span.longitudeDelta) { | |
| updateRegion = YES; | |
| } | |
| if (updateRegion) { | |
| self.manuallyChangingMap = YES; | |
| [mapView setRegion:region animated:YES]; | |
| self.manuallyChangingMap = NO; | |
| } | |
| } | |
| } |
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I tried this, and it doesn't work, as
self.manuallyChangingMap = NO;is called before- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animatedwhich is caused by[mapView setRegion:region animated:YES];.