Question

我有一个需要做两件事的应用程序;

获取当前位置
将Mapview更新到该位置

我正在使用以下代码;

-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation     *)newLocation fromLocation:(CLLocation *)oldLocation
{
    CLLocation *currentLocation = newLocation;
    if (currentLocation != nil) {
    NSLog(@"%.8f", currentLocation.coordinate.longitude);
    NSLog(@"%.8f", currentLocation.coordinate.latitude);
    NSLog(@"%f", currentLocation.speed);

    MKCoordinateRegion mapRegion;
    mapRegion.center.longitude = currentLocation.coordinate.longitude;
    mapRegion.center.latitude = currentLocation.coordinate.latitude;
    mapRegion.span.latitudeDelta = 0.03;
    mapRegion.span.longitudeDelta = 0.03;
    [_mapView setRegion:mapRegion animated: YES];
}
}

除了一件事，一切都按照我的预期发生。当MapView区域更新时，MAP会移动，但PIN不会移动。最终，用户引脚不在屏幕上，因为地图与坐标一致。

非常感谢任何帮助。

Answer 1

在下面设置_mapView区域的位置，您还应该使用currentLocation创建一个新的注释并将其添加到_mapView。代码看起来应该是，

-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation     *)newLocation fromLocation:(CLLocation *)oldLocation
{
    CLLocation *currentLocation = newLocation;
    if (currentLocation != nil) {
    NSLog(@"%.8f", currentLocation.coordinate.longitude);
    NSLog(@"%.8f", currentLocation.coordinate.latitude);
    NSLog(@"%f", currentLocation.speed);

    MKCoordinateRegion mapRegion;
    mapRegion.center.longitude = currentLocation.coordinate.longitude;
    mapRegion.center.latitude = currentLocation.coordinate.latitude;
    mapRegion.span.latitudeDelta = 0.03;
    mapRegion.span.longitudeDelta = 0.03;
    [_mapView setRegion:mapRegion animated: YES];

    MyAnnotation *ant = [[MyAnnotation alloc] initWithCoordinate:currentLocation.coordinate];
    [_mapView addAnnotation:ant];
}

iOS使用CLLocation＆amp; MapView一起获取坐标并更新地图

1 个答案: