#define LOCATION_DISTANCE 80.4672
- (void)viewDidLoad
{
[super viewDidLoad];
....some computation
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
[locationManager setDesiredAccuracy:kCLLocationAccuracyBestForNavigation];
[locationManager setDistanceFilter:kCLDistanceFilterNone];
[locationManager startUpdatingLocation];
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, 360.0*NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
[locationManager stopUpdatingLocation];
});
..........some more computation
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *obj = [locations lastObject];
if (obj.coordinate.latitude != 0 && obj.coordinate.longitude != 0 )
{
CLLocationCoordinate2D currrentCoordinates ;
currrentCoordinates.latitude = obj.coordinate.latitude;
currrentCoordinates.longitude = obj.coordinate.longitude;
if(obj.horizontalAccuracy>0 && obj.horizontalAccuracy<100){
self.turnedOffLocationServices =YES;
[locationManager stopUpdatingLocation];
} .... more computation
[self setUpMap:currrentCoordinates];
}
- (void)setUpMap:(CLLocationCoordinate2D)currentCoordinates
{
MKCoordinateRegion extentsRegion = MKCoordinateRegionMakeWithDistance(currentCoordinates, LOCATION_DISTANCE, LOCATION_DISTANCE);
MKMapView *mvMap = [[MKMapView alloc] initWithFrame:CGRectMake(20, 594, 360, 347)];
mvMap.delegate = self;
[mvMap setRegion:extentsRegion animated:YES];
mvMap.mapType = MKMapTypeSatellite;
mvMap.autoresizingMask = UIViewAutoresizingNone;
//mvMap.showsUserLocation = YES;
NSLog(@"the current lat is %f", currentCoordinates.latitude);
NSLog(@"the current long val is %f", currentCoordinates.longitude);
[self.scrollView addSubview:mvMap];
ITMAnnotation *annotation = [[ITMAnnotation alloc] initWithCoordinate:currentCoordinates addressDictionary:nil];
annotation.title = @"Drag to Move Pin";
annotation.subtitle = [NSString stringWithFormat:@"%f %f", annotation.coordinate.latitude, annotation.coordinate.longitude];
NSLog(@"subtitle change at 314");
[mvMap addAnnotation:annotation];
self.tempMapView = mvMap;
}
所以我有 viewDidLoad 来创建位置管理器。我认为应该使用 didUpdateLocations。我使用该坐标调用 setUpMap 方法,然后在 ipad 屏幕的左下角得到一张地图。我的问题是:1)在无 WiFi/蜂窝模式下,我无法获得准确的位置。它的方式。但是我手动输入坐标(有文本字段将采用这个坐标)它可以工作并显示位置。2)我假设在这种无 wifi/无蜂窝模式下添加了 4 条记录。我可以在地图显示中添加 3 个罚款(但再次与我当前的位置不同的位置)。但是在第四次(或稍后的某个时间),当我访问应该显示地图的屏幕时,它是白色的。这有意义吗。如果您需要更多信息,请询问。谢谢..哦,这一切都在设备上而不是模拟器上。还有它的iOS6。