I have converted a longitude and latitude on my MapView to a MKMapPoint. I then want to move an imageView to that point using the imageViews center property. It seems that I somehow need to convert the MKMapPoint to a CGPoint so that I can change the center, but the numbers seem to be way off. Here is what I am using:
// Convert to MKMapPoint
CLLocationCoordinate2D coord;
coord.latitude = [loc.latitude doubleValue];
coord.longitude = [loc.longitude doubleValue];
MKMapPoint point = MKMapPointForCoordinate(coord);
// Move our image
CGFloat newXPos = point.x;
CGFloat newYPos = point.y;
CGPoint newCenter = {newXPos, newYPos};
self.movingMarker.center = newCenter;
//self.movingMarker.frame.origin.x = point.x;
//self.movingMarker.frame.origin.y = point.y;
Ideas on how to make my MKMapPoint a workable value to use for the center property of my image?
Looks like MKMapView has a method for doing this:
CGPoint newCenter = [self.map convertCoordinate:coord toPointToView:self.map];
Related
I have a collection of CGPoints obtained from converting geographic coordinates obtained form Core Location frame work delegate method. The collection is a set of start/end points.
I am obtaining the coordinates from CoreLocation delegate method
CLLocationCoordinate2D coordinate;
CLLocationDegrees latitude;
CLLocationDegrees longitude;
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
CLLocation *location = [locations lastObject];
latitude = location.coordinate.latitude;
longitude = location.coordinate.longitude;
}
I am converting the current latitude and longitude to CGPoint as below
CGPoint startPoint = [mapView convertCoordinate:retrievedCoordinate toPointToView:self.view];
CGPoint endPoint = [mapView convertCoordinate:retrievedEndCoordinate toPointToView:self.view];
I need to draw lines on my UIView based on the values in the collection. How can I adjust/scale correctly, the CGPoints with respect to the UIView. UIView frame size is (0, 0, 768, 1004).
This is the scaling I have done
- (CGPoint)convertLatLongCoord:(CGPoint)latLong {
CGSize screenSize = [UIScreen mainScreen].applicationFrame.size;
CGFloat SCALE = MIN(screenSize.width, screenSize.height) / (2.0 * EARTH_RADIUS);
CGFloat OFFSET = MIN(screenSize.width, screenSize.height) / 2.0;
CGFloat x = EARTH_RADIUS * cos(latLong.x) * cos(latLong.y) * SCALE + OFFSET;
CGFloat y = EARTH_RADIUS * cos(latLong.x) * sin(latLong.y) * SCALE + OFFSET;
return CGPointMake(x, y);
}
where #define EARTH_RADIUS 6371
The line drawing is not correct, since somewhere the conversion to CGPoint might be wrong. What am I doing wrong. Help needed.
For convert CLLocationCoordinate2D to CGPoint see answer here - https://stackoverflow.com/a/37276779/2697425
To all
I am using the
UITapGestureRecognizer*singleTap = [[[UITapGestureRecognizer alloc] initWithTarget: self action:#selector(doSingleTap:)] autorelease];
singleTap.numberOfTouchesRequired = 2;
[self.view addGestureRecognizer:singleTap
for getting the touch
And in doSingleTap: method i have this
-(void)doSingleTap:(UITapGestureRecognizer *)recognizer
{
CGPoint point = [recognizer locationOfTouch:0 inView:self.view];
NSLog(#"location X =>%f,location =>%f ",point.x,point.y);
CGPoint point1 = [recognizer locationOfTouch:1 inView:self.view];
NSLog(#"location X =>%f,location =>%f ",point1.x,point1.y);
NSLog(#"location X =>%f,location =>%f ",x,y);
UIView *test1 = [[UIView alloc]initWithFrame:CGRectMake(point.x, point1.y, x, y)];
test1.backgroundColor= [UIColor greenColor];
[self.view addSubview:test1];
}
getting the problem in adding the new view on the main view according to the finger location or position View is properly getting add on the view according to the position .
I want that view get add according to the two finger and automatically adjust their (x,y,w,h).
I need help if any one help me
Thanks in advance I google on this but didn't get any help
Compare with point.x and point1.x take lesser 1 as x and do same for y (compare with point.y and point1.y smaller 1 as y). take the difference between point.x and point1.x as width and do same for height (difference between point.y and point1.y) will sove the issue
float x = (point.x < point1.x) ? point.x : point1.x;
float y = (point.y < point1.y) ? point.y : point1.y;
float width = fabsf(point.x - point1.x);
float height = fabsf(point.y - point1.y);
UIView *test1 = [[UIView alloc]initWithFrame:CGRectMake(x, y,width,height)];
Try to calculate rect of view with the next:
float x = MIN(point.x, point1.x);
float y = MIN(point.y, point1.y);
float width = fabsf(point.x - point1.x);
float height = fabsf(point.y - point1.y);
CGRect frame = CGRectMake(x, y, width, height);
I am trying to learn how to use a polyline to connect two points on a map in ios6. First off, I have read over every tutorial on this subject that a simple Google search turns up and can not get polylines to work for one reason. Every tutorial that I have seen always adds the polyline to the map and adjusts the zoom of the map to fit the whole line. How would I go about making and adding a polyline to a map in ios6 if I want the map to stay zoomed in at a constant distance and only show the end of the polyline if it is larger then the current view?
For example say I had a polyline that was a mile long and wanted the map to stay zoomed in at a constand distacne equivelent to:
MKCoordinateRegion userRegion = MKCoordinateRegionMakeWithDistance(self.currentLocation.coordinate, 1000, 1000);
[self.mainMap setRegion:[self.mainMap regionThatFits:userRegion] animated:YES];
How would I go about doing this? Please provide full code examples or a sample project that I could download!
MKMapPoint * malloc / assign:
MKMapPoint *newPoints = malloc((sizeof (MKMapPoint) * nbPoints));
newPoints[index] = varMKMapPoint;
free(newPoints);
MKPolyline must be initialize in your needed :
MKPolyline *polyline = [MKPolyline polylineWithPoints:newPoints count:nbPoints];
[self.mapView addOverlay:polyline];
to display your MKPolyline, you have to use viewForOverlay :
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
MKOverlayView* overlayView = [[MKOverlayView alloc] initWithOverlay:overlay];
if([overlay isKindOfClass:[MKPolyline class]]) {
MKPolylineView *backgroundView = [[MKPolylineView alloc] initWithPolyline:overlay];
backgroundView.fillColor = [UIColor blackColor];
backgroundView.strokeColor = backgroundView.fillColor;
backgroundView.lineWidth = 10;
backgroundView.lineCap = kCGLineCapSquare;
overlayView = backgroundView;
}
return overlayView;
}
To use this method, you have to convert your points to CLLocation, it will returns a MKCoordinateRegion that you will set to mapView :
- (MKCoordinateRegion)getCenterRegionFromPoints:(NSArray *)points
{
CLLocationCoordinate2D topLeftCoordinate;
topLeftCoordinate.latitude = -90;
topLeftCoordinate.longitude = 180;
CLLocationCoordinate2D bottomRightCoordinate;
bottomRightCoordinate.latitude = 90;
bottomRightCoordinate.longitude = -180;
for (CLLocation *location in points) {
topLeftCoordinate.longitude = fmin(topLeftCoordinate.longitude, location.coordinate.longitude);
topLeftCoordinate.latitude = fmax(topLeftCoordinate.latitude, location.coordinate.latitude);
bottomRightCoordinate.longitude = fmax(bottomRightCoordinate.longitude, location.coordinate.longitude);
bottomRightCoordinate.latitude = fmin(bottomRightCoordinate.latitude, location.coordinate.latitude);
}
MKCoordinateRegion region;
region.center.latitude = topLeftCoordinate.latitude - (topLeftCoordinate.latitude - bottomRightCoordinate.latitude) * 0.5;
region.center.longitude = topLeftCoordinate.longitude + (bottomRightCoordinate.longitude - topLeftCoordinate.longitude) * 0.5;
region.span.latitudeDelta = fabs(topLeftCoordinate.latitude - bottomRightCoordinate.latitude) * 1.2; //2
region.span.longitudeDelta = fabs(bottomRightCoordinate.longitude - topLeftCoordinate.longitude) * 1.2; //2
// NSLog(#"zoom lvl : %f, %f", region.span.latitudeDelta, region.span.latitudeDelta);
return region;
}
Hope this helps.
I want the map to load showing the entire UK when it initialises.
I have about 20 annotations throughout the UK so want it to display them all.
Thanks
Set a coordinate around center of UK and adjust zoom level.
You can do something like this
MKMapRect flyTo = MKMapRectNull;
NSArray *array = mapView.annotations;
for(MyAnnotation *an in array)
{
MKMapPoint point = MKMapPointForCoordinate(an.coordinate);
MKMapRect rect = MKMapRectMake(0, 0, point.x, point.y);
if(MKMapRectIsNull(flyTo))
flyTo = rect;
else
flyTo = MKMapRectUnion(flyTo, rect);
}
mapView.visibleMapRect = flyTo;
I am using the following code (based on the Apple WWDC 2010 TileMap example) to load an UIMapView with a MKOverlay image (this could is in the viewDidLoad method):
NSString *tileDirectory = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"Tiles"];
TileOverlay *overlay = [[TileOverlay alloc] initWithTileDirectory:tileDirectory];
[map addOverlay:overlay];
Next I was to center the UIMapView map in the center of this overlay. At the moment I am doing this my hard-coding the latitude and longitude as follows:
double myLatitude = ...;
double myLongitude = ...;
CLLocation *location = [[CLLocation alloc] initWithLatitude:myLatitude longitude:myLongitude];
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(location.coordinate, 4000, 4000);
MKCoordinateRegion adjustedRegion = [map regionThatFits:viewRegion];
[map setRegion:adjustedRegion animated:YES];
This works fine. I have tried to calculate the center of the overlay as follows:
double x, y;
x = MKMapRectGetMidX([overlay boundingMapRect]);
y = MKMapRectGetMidY([overlay boundingMapRect]);
CLLocationCoordinate2D coord = MKCoordinateForMapPoint(MKMapPointMake(x, y));
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(coord, 4000, 4000);
MKCoordinateRegion adjustedRegion = [map regionThatFits:viewRegion];
[map setRegion:adjustedRegion animated:YES];
But this does not work. The MKCoordinateForMapPoint returns a latitude/longitude outside the overlay. I don't understand why.
Can anyone suggest a solution?
Thanks in advance...