Ios 使用CLLocation&；MapView一起获取坐标并更新地图

我有一个应用程序需要做两件事

获取当前位置

将地图视图更新到该位置

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];
}
}

一切都如我所料，除了一件事。当地图视图区域更新时，地图会移动，但接点不会移动。最终，用户pin会离开屏幕，因为地图是按照坐标移动的

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任何帮助都将不胜感激。

在下面设置“地图视图区域”的位置，您还应使用currentLocation创建一个新注释，并将其添加到“地图视图”中。代码应该是这样的

-(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];
}

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在设置_mapView区域的下方，还应使用currentLocation创建一个新注释，并将其添加到_mapView中。代码应该是这样的

-(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];
}