地图开发常用代码
1、//更新地图可见区域，让所有公交站点在地图可见区域
- (void)updateMapviewVisibleRegion {
MKMapRect zoomRect = MKMapRectNull;
for (id <MKAnnotation> annotation in self.mapView.annotations) {
MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
if (MKMapRectIsNull(zoomRect)) {
zoomRect = pointRect;
} else {
zoomRect = MKMapRectUnion(zoomRect, pointRect);
}
}
zoomRect = [self.mapView mapRectThatFits:zoomRect];
[self.mapView setVisibleMapRect:zoomRect animated:YES];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id < MKAnnotation >)annotation {
//判断是否是自身位置
if ([annotation isKindOfClass:[MKUserLocation class]]) {
return nil;
}
//验证参数
if (![annotation isKindOfClass:[ZPMKAnnotation class]]) {
return nil;
}
static NSString *strIdentifier = @"MapViewRouteAnnotationViewIdentifier";
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:strIdentifier];
if (nil == pinView) {
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:strIdentifier] autorelease];
pinView.tag = ((ZPMKAnnotation *)annotation).stationID;
pinView.pinColor = MKPinAnnotationColorGreen;
pinView.canShowCallout = YES;
pinView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinView.draggable = YES;
}else {
pinView.annotation = annotation;
}
return pinView;
}
2、在地图上画线
//更新地图可见区域，让所有公交站点在地图可见区域
- (void)updateMapviewVisibleRegion {
MKMapRect zoomRect = MKMapRectNull;
for (id <MKAnnotation> annotation in self.mapView.annotations) {
MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
if (MKMapRectIsNull(zoomRect)) {
zoomRect = pointRect;
} else {
zoomRect = MKMapRectUnion(zoomRect, pointRect);
}
}
zoomRect = [self.mapView mapRectThatFits:zoomRect];
[self.mapView setVisibleMapRect:zoomRect animated:YES];
}
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay {
if(overlay == self.routeLine) {
self.routeLineView = [[[MKPolylineView alloc] initWithPolyline:self.routeLine] autorelease];
self.routeLineView.fillColor = [UIColor blueColor];
self.routeLineView.strokeColor = [UIColor blueColor];
self.routeLineView.lineWidth = 5;
return self.routeLineView;
}
return nil;
}