大家好......我知道这是一个重复的问题,但我仍然无法让它工作,我确定我错过了一些简单的东西。我已经在 IB 中设置了委托,并且调用了 RegionDidChange,所以我知道 mapView 委托已连接。但是我无法显示任何覆盖,甚至无法调用委托方法。这是代码:
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
self.map.region = MKCoordinateRegionMakeWithDistance(
newLocation.coordinate,
milesToMeters(radius),
milesToMeters(radius)
);
self.map.centerCoordinate = newLocation.coordinate;
circle = [MKCircle circleWithCenterCoordinate:newLocation.coordinate radius:50.];
[self.map addOverlay:circle];
[locationManager stopUpdatingLocation];
}
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
NSLog(@"region did change");
}
- (MKOverlayView *)map:(MKMapView *)map viewForOverlay:(id <MKOverlay>)overlay {
NSLog(@"circling");
if ([overlay isKindOfClass:[MKCirlce class]])
{
MKCircleView *circleView = [[[MKCircleView alloc] initWithCircle:overlay] autorelease];
circleView.lineWidth = 1.0;
circleView.strokeColor = [UIColor redColor];
return circleView;
}
return nil;
}
非常感谢。朱尔斯