Det er mulig å vise vei i MapKit: Bare bruk MKPolyline
Jeg får polylinje streng fra googleMapsApi. Jeg analysere den på server med php, og returnere endelig polilyne streng til min app.
NSMutableArray *points = [myApp decodePolyline:[route objectForKey:@"polyline"]];
if([points count] == 0)
{
return;
}
// while we create the route points, we will also be calculating the bounding box of our route
// so we can easily zoom in on it.
MKMapPoint northEastPoint;
MKMapPoint southWestPoint;
// create a c array of points.
MKMapPoint* pointArr = malloc(sizeof(CLLocationCoordinate2D) * [points count]);
for(int idx = 0; idx < points.count; idx++)
{
// break the string down even further to latitude and longitude fields.
NSString* currentPointString = [points objectAtIndex:idx];
NSArray* latLonArr = [currentPointString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@","]];
CLLocationDegrees latitude = [[latLonArr objectAtIndex:0] doubleValue];
CLLocationDegrees longitude = [[latLonArr objectAtIndex:1] doubleValue];
// create our coordinate and add it to the correct spot in the array
CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);
MKMapPoint point = MKMapPointForCoordinate(coordinate);
if (idx == 0) {
northEastPoint = point;
southWestPoint = point;
}
else
{
if (point.x > northEastPoint.x)
northEastPoint.x = point.x;
if(point.y > northEastPoint.y)
northEastPoint.y = point.y;
if (point.x < southWestPoint.x)
southWestPoint.x = point.x;
if (point.y < southWestPoint.y)
southWestPoint.y = point.y;
}
pointArr[idx] = point;
_currentLenght++;
}
// create the polyline based on the array of points.
self.routeLine = [MKPolyline polylineWithPoints:pointArr count:points.count];
_routeRect = MKMapRectMake(southWestPoint.x, southWestPoint.y,
northEastPoint.x - southWestPoint.x,
northEastPoint.y - southWestPoint.y);
// clear the memory allocated earlier for the points
free(pointArr);
if (nil != self.routeLine) {
[self.mapView addOverlay:self.routeLine];
}
[self.mapView setVisibleMapRect:_routeRect];
Og viser:
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
MKOverlayView* overlayView = nil;
if(overlay == self.routeLine)
{
self.routeLineView = [[[MKPolylineView alloc] initWithPolyline:self.routeLine] autorelease];
self.routeLineView.fillColor = [UIColor blueColor];
self.routeLineView.strokeColor = TICNavigatorColor;
self.routeLineView.lineWidth = 7;
self.routeLineView.lineJoin = kCGLineJoinRound;
self.routeLineView.lineCap = kCGLineCapRound;
overlayView = self.routeLineView;
}
return overlayView;
}
Gi det et forsøk.
