*Note this works perfectly in xcode and is only a problem on a iPhone running IOS 4.2.1
When I set the map to fit a region it does not refresh the map until I touch the screen. The bit of code I use is:
MKCoordinateRegion scaledRegion = [mapView regionThatFits:region];
[mapView setRegion:scaledRegion animated:YES];
This does move the map to the correct region which I can see when I touch the screen but until I touch the screen I get a grey screen with lots of grid lines across it.
It almost seems like the map is waiting for some sort of refresh event. I have also tried the following code with no success.
MKCoordinateRegion scaledRegion = [mapView regionThatFits:region];
[mapView setRegion:scaledRegion animated:YES];
[mapView setCenterCoordinate:mapView.region.center animated:NO];
It is also worth noting this is running in a thread.
Thanks in advance for any help.
Very weird I have turned off the animation with the following code
[mapView setRegion:scaledRegion animated:YES];
to
[mapView setRegion:scaledRegion animated:NO];
And it has started working? I do not understand why?
Related
I have an MKMapView. To change the displayed region I use
[self.mapView setRegion:region animated:YES];
The strange is that on simulator the region is changed with animation, but on device the change is immediate and not animated.
I change the region after a long tap on the map...
This behavior drive me crazy and I can't able to solve it...
Thanks...
You need to slow down setRegion by using the following code
[self performSelector:#selector(setMapRegion) withObject:nil afterDelay:3.0];
-(void) setMapRegion
{
[self.mapView setRegion:region animated:YES];
}
If you load the map on device and iOS 6+ you'll experience a bit of delay till the tiles are loaded so the best thing to do is to try delaying the region change.
The map is not responsive even you set the animation it won't appear that clearly to you,it would look like it's not making any animation.
MKMapView calls its delegate method mapViewDidFinishLoadingMap: once the map has loaded all the necessary tiles and is ready to use. You should call setRegion:animated: there.
[_mapView selectAnnotation:sannotation animated:YES];
It appears not always, so I don't understand what's the reason for it.
How to fix it?
Before selecting any annotation deselect all annotations on mapView.
for (id<MKAnnotation> annotation in mapView.annotations)
[mymap deselectAnnotation:annotation animated:NO];
I had same issue when along with default callout, I had implemented custom callouts. Though it is not a perfect solution it served the purpose.
If I want a map view to show a specific map region (which is the same each time the app launches?), how would I set that up?
Also, it is possible to prevent the user from scrolling away from this region, and also prevent the user from scrolling too far out?
1. Specific region
MKCoordinateRegion predefinedRegion;
[mapView setRegion:predefinedRegion animated:YES];
2. Prevent scrolling
mapView.scrollEnabled = NO;
3. Prevent zooming
mapView.zoomEnabled = NO;
If you just want to limit the zoom level it is a bit more complicated because zooming effectively changes the region. The best way to manage this is probably by using the MKMapViewDelegate protocol methods such as mapView:regionWillChangeAnimated:.
Cheers,
Sascha
Update #5 I guess it's bounty time. 100+ views and no one's taken a stab, even with the code sample I've posted. How about some reputation points!
Update #4This is a pretty complicated question, so I created a new tab based project which just includes the parts of my app I'm having trouble with here. You can download it from: http://www.servinitup.net/CustomCalloutAnnotation.zip
Feel free to open it up (need to add your own bundle identifier to run it on your phone) and play around with it, and see if you can get that darned callout annotation to move with the pin!
Update #3 Tried making setAnnotation a public method of the tutorial's CalloutMapAnnotationView and calling that directly. Didn't have any luck. Despite little oddities that occurred, the only thing that moved was the little triangle portion of the callout. I could not get the entire callout to move.
Update #2 Still not much luck, but have now been looking for ways to programmatically create a "pinch to zoom" and then undo it immediately, so the user never sees a change. Hoping that doing this programmatically will have the same effect as doing it manually, and the callout annotation will pop back to it's parent. Any ideas?
Update #1 After playing around here's where I've gotten:
- replaced self.calloutAnnotation.coordinate = coords; with self.calloutAnnotation.latitude = coords.latitude;self.calloutAnnotation.longitude = coords.longitude;
- With that changed, if I slightly pinch the map to zoom in or out after the pin has been updated, the callout annotation animates to the correct position, right over the pin.
So now I need to figure out how to get this to happen without the user having to actually pinch to zoom.
Original Post
I, along with other SO users, are using this awesome solution to create a custom callout annotation:
http://blog.asolutions.com/2010/09/building-custom-map-annotation-callouts-part-1/
When you use a standard callout (annotationview.canShowCallout = true) and the pin moves around the screen as the location is updated, the standard callout tracks right along with the pin, as if they're locked together.
When using the custom callout solution above, when my pin moves around after location updates, the callout annotation stays in it's original location. Of course, I'd like to mimic the iOS standard and have the custom callout annotation track along with the pin.
Here's the code I have so far, that's successfully moving the annotation view, but not the custom callout annotation view:
/* core location broadcasts a notification, and my view controller listens to that notification and calls locationManagerDidFindLocation */
- (void)locationManagerDidFindLocation:(NSNotification *)notif {
CLLocation *location = [notif.userInfo objectForKey:#"location"];
CLLocationCoordinate2D coords = [location coordinate];
MKCoordinateSpan span = MKCoordinateSpanMake((5/69), (5/69));
MKCoordinateRegion region = {coords, span};
// if we don't have a current location yet, create one, place it on the map, and adjust the map's region
// otherwise, update the annotation placement and map position in a smooth animation
if (self.currentLocationAnnotation == nil) {
self.currentLocationAnnotation = [[CurrentLocationAnnotation alloc] initWithCoordinate:coords andTitle:#"My Title" andSubtitle:#"My subtitle"];
[self.mapView addAnnotation:self.currentLocationAnnotation];
[self.mapView setRegion:region animated:true];
[self.mapView regionThatFits:region];
} else {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.45];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
// this moves my annotation view perfectly
self.currentLocationAnnotation.coordinate = coords;
// ******* this is where my problem is
// ******* this custom callout annotation view stays
// ******* in it's original place, even though it's
// ******* parent annotation view is moving around the screen
self.calloutAnnotation.coordinate = coords;
[self.mapView setRegion:region animated:true];
[self.mapView regionThatFits:region];
[UIView commitAnimations];
}
}
I created a project based on your CalloutMapAnnotationView demonstrating a IB based solution. Arrow keys animate motion of the location annotation and it's callout annotation. The callout now also automatically resizes based on the supplied contentView, and the view is loaded from a separate nib. Good luck!
https://github.com/jacobjennings/JJMapCallout
I know you aren't going to like this answer, but it works. The sample you linked to just draws a custom image in the overlay through the most difficult way possible (drawRect:). Have you considered rendering your overlay once into a UIImage, and just setting the image property on a very simple MKAnnotationView? Even if you need to change the content periodically, like updating the number of friends at a bar, you can redraw the image when the change occurs and update the appropriate MKAnnotationView.
I review your code and my recommendation is to create a new custom MKAnnotationView and encapsulate on it both views (the pin and the callout).
But for your current code consider read the approved response this question: MKMapView moving Annotations Automatically - animate them?
Cheers.
Does anyone know how to mimic the map curl in the Google Map application without using the undocumented mapCurl and mapUncurl API?
Ideally I would like to do the same thing as the Google Map application. If this is not possible, is there any way to 'slide' the map image up to show the options?
SampleViewController *sampleView = [[[SampleViewController alloc] init] autorelease];
[sampleView setModalTransitionStyle:UIModalTransitionStylePartialCurl];
[self presentModalViewController:sampleView animated:YES];
[UIView transitionFromView:self.view toView:overlayView duration:1 options:UIViewAnimationOptionTransitionCurlUp completion:nil];
Will do the animation of the page curl up if thats what you mean. I haven't found a way to pause it half way like the google maps app does, but in theory if you implement the UIView animation delegate methods you might be able to pause it half way or something.
EDIT:
[UIView transitionFromView:overlayView toView:self.view duration:1 options:UIViewAnimationOptionTransitionCurlDown completion:nil];
is the curl down implementation of it.
Just so you are aware overlayView is UIView, not a UIViewController, not that it should matter but thats how I implemented it.