他正在拼命等待解决方案...我正在显示当前用户位置和一些自定义注释，但是，当我尝试放大地图时，我的地图会自动重定向到默认缩放的当前位置，这是因为span.please 检查我的代码并纠正我。（当当前位置不显示模拟器和设备时，我可以放大其他注释）
- (void)viewDidLoad
{
[super viewDidLoad];
self.locationManager = [[CLLocationManager alloc]init];
self.locationManager.delegate = self;
[self.locationManager startUpdatingLocation];
[self loadMultipleAnnotations];
self.map_view.delegate = self;
}
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
CLLocationCoordinate2D coordinate;
coordinate.latitude = newLocation.coordinate.latitude;
coordinate.longitude = newLocation.coordinate.longitude;
MKCoordinateSpan span;
span.latitudeDelta = 5;
span.longitudeDelta = 5;
MKCoordinateRegion region;
region.center = coordinate;
region.span= span;
[self.map_view setRegion:region];
MKPointAnnotation *pointAnnotation = [[MKPointAnnotation alloc]init];
pointAnnotation.coordinate = coordinate;
[self.map_view setRegion:region animated:YES];
double radius = 40000.0;
MKCircle *circle1 = [MKCircle circleWithCenterCoordinate:coordinate radius:radius];
circle1.title = @"Current location Marking";
[self.map_view addOverlay:circle1];
}
- (MKOverlayView *)mapView:(MKMapView *)map viewForOverlay:(id <MKOverlay>)overlay
{
if ([overlay isKindOfClass:[MKCircle class]])
{
MKCircleView *circleView = [[MKCircleView alloc] initWithOverlay:(MKCircle*)overlay];
circleView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:0.0];
circleView.strokeColor = [[UIColor redColor] colorWithAlphaComponent:0.7];
circleView.lineWidth = 3;
return circleView;
}
return nil;
}
-(void)loadMultipleAnnotations
{
NSMutableArray *arrLatti = [NSMutableArray arrayWithObjects:@"27.175015",@"28.171391",@"29.169005",@"22.105999",@"17.811456",@"21.453069",@"22.593726",@"38.444985",@"35.603719",@"35.603719",@"36.844461",@"35.889050",@"33.651208",@"38.238180",@"36.862043",@"36.949892",@"37.142803",@"37.71859", nil];
NSMutableArray *arrLong = [NSMutableArray arrayWithObjects:@"78.042155",@"79.037090",@"80.043206",@"75.761719",@"79.804688",@"81.562500",@"79.277344",@"-121.871338",@"-118.641357",@"-120.536499",@"-120.591431",@"-116.334229",@"-116.971436",@"-121.827393",@"-117.784424",@"-119.564209",@"-118.289795",@"-122.299805", nil];
NSMutableArray *arrTitle = [NSMutableArray arrayWithObjects:@"relative1",@"criminal1",@"criminal2",@"criminal3",@"criminal4",@"criminal5",@"criminal6",@"criminal7",@"criminal8",@"criminal9",@"relative2",@"client",@"criminal10",@"relative3",@"criminal11",@"relative4",@"criminal13",@"Offender", nil];
NSMutableArray *arrList = [[NSMutableArray alloc]init];
for (int i= 0; i< [arrLatti count]; i++)
{
List *list = [[List alloc]init];
list.latitt = [arrLatti objectAtIndex:i];
list.log = [arrLong objectAtIndex:i];
list.title = [arrTitle objectAtIndex:i];
[arrList addObject:list];
List *obj = [arrList objectAtIndex:i];
CLLocationCoordinate2D locationCoordinate;
locationCoordinate.latitude = [obj.latitt floatValue];
locationCoordinate.longitude = [obj.log floatValue];
MKPointAnnotation *pointAnnotation = [[MKPointAnnotation alloc]init];
pointAnnotation.coordinate =locationCoordinate;
pointAnnotation.title = obj.title;
[self.map_view addAnnotation:pointAnnotation];
MKCoordinateSpan span;
span.latitudeDelta = 10;
span.longitudeDelta = 10;
MKCoordinateRegion region;
region.center = locationCoordinate;
region.span = span;
[self.map_view selectAnnotation:pointAnnotation animated:YES];
[self.map_view setRegion:region animated:YES];
}
}
- (MKAnnotationView *)mapView:(MKMapView *)mv viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
static NSString *reuseId = @"reuseid";
MKAnnotationView *av = [_map_view dequeueReusableAnnotationViewWithIdentifier:reuseId];
if (av == nil)
{
av = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseId] ;
}
else
{
av.annotation = annotation;
}
if ([annotation.title isEqualToString:@"criminal1"] || [annotation.title isEqualToString:@"Offender"] || [annotation.title isEqualToString:@"criminal2"]|| [annotation.title isEqualToString:@"criminal3"]|| [annotation.title isEqualToString:@"criminal4"]|| [annotation.title isEqualToString:@"criminal5"]|| [annotation.title isEqualToString:@"criminal6"]|| [annotation.title isEqualToString:@"criminal7"]|| [annotation.title isEqualToString:@"criminal8"]|| [annotation.title isEqualToString:@"criminal9"]|| [annotation.title isEqualToString:@"criminal10"]|| [annotation.title isEqualToString:@"criminal11"]|| [annotation.title isEqualToString:@"criminal12"]|| [annotation.title isEqualToString:@"criminal13"]|| [annotation.title isEqualToString:@"criminal14"]|| [annotation.title isEqualToString:@"criminal15"])
{
av.image = [UIImage imageNamed:@"marker.png"];
av.centerOffset = CGPointMake(0.0f, -16.5f);
}
else
{
av.image = [UIImage imageNamed:@"markerBlue.png"];
av.centerOffset = CGPointMake(0.0f, -24.5f);
}
av.canShowCallout = YES;
return av;
}