MapKit始终以用户位置为中心

Question

我有一个地图，它在加载时适当地缩放到当前位置，但随后不允许你在地图上平移，而不会立即放大用户位置。我一直在使用跟踪模式，但没有得到正确的修复。这是一些代码，感谢您的帮助。

    - (void)viewDidLoad
{
    [super viewDidLoad];
    contentArray = [[NSMutableArray alloc] init];
    mapViewuno.delegate = self;
    mapViewuno.mapType = MKMapTypeStandard;
    mapViewuno.userInteractionEnabled=YES;
    locationManager = [[CLLocationManager alloc] init];
    // Do any additional setup after loading the view, typically from a nib.
}
- (BOOL)prefersStatusBarHidden {
    return YES;
}
-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    self.navigationController.navigationBarHidden = YES;
    indexValue = 0;
    NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"mapAddress" ofType:@"plist"];
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];
    NSString *strID = [NSString stringWithFormat:@"%d",intID];
    NSLog(@"array : %@",[dict objectForKey:strID]);
    [contentArray removeAllObjects];
    [contentArray addObjectsFromArray:[dict objectForKey:strID]];
    [contentArray retain];
    [self zoomToUserLocation:mapViewuno.userLocation];
}
- (void)zoomToUserLocation:(MKUserLocation *)userLocation
{
    if (!userLocation)
        return;
    MKCoordinateRegion region;
    region.center = userLocation.location.coordinate;
    region.span = MKCoordinateSpanMake(.5, .5);
    region = [mapViewuno regionThatFits:region];
    [mapViewuno setRegion:region animated:YES];
    counter = 0;
    [mapViewuno removeAnnotations:mapViewuno.annotations];
    if([contentArray count] != 0)
    {
        for(indexValue = 0; indexValue<[contentArray count];indexValue++)
        {
            FirstAnnotation *obj=[[FirstAnnotation alloc]init];
            obj.latitude = [[[contentArray objectAtIndex:indexValue] objectForKey:@"lattitude"] floatValue];
            obj.longitude = [[[contentArray objectAtIndex:indexValue] objectForKey:@"Longitude"] floatValue];
            obj.titleName=[[contentArray objectAtIndex:indexValue] objectForKey:@"Title"];
            obj.Address = [[contentArray objectAtIndex:indexValue] objectForKey:@"Address"];
            obj.Phone = [[contentArray objectAtIndex:indexValue] objectForKey:@"Phone"];
            obj.intTag = indexValue;
            [mapViewuno addAnnotation:obj];
        }
        if ([mapViewuno.annotations count] == 0) return;
                //        [self.mapView setRegion:newRegion animated:YES];
    }
}
-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    [self zoomToUserLocation:userLocation];
}

Answer 1

这部分导致了问题：

-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    [self zoomToUserLocation:userLocation];
}

每次地图视图

的位置管理器获得新的修复（即每秒左右）时，地图视图都会调用该委托方法，而委托方法又调用您的方法进行缩放。放入像zoomedToUserLocation这样的BOOL，并将其设置为在初始化时NO，然后在第一次击中zoomToUserLocation时YES。