我有两个问题,
任何指针将不胜感激。如您所见,我一直在谷歌搜索和阅读大量文档,但没有取得多大成功。
最佳答案
下面是一个示例,它创建一个圆圈并在用户触摸并按住手指 1 秒钟的位置放置一个图钉。它使用了一个 UILongPressGestureRecognizer,它被添加到 mapView 的任何初始化 map 的位置(例如 viewDidLoad)。
确保也设置了 mapView 的委托(delegate)。
// In viewDidLoad or where map is initialized...
UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
lpgr.minimumPressDuration = 1.0; //user must hold for 1 second
[mapView addGestureRecognizer:lpgr];
[lpgr release];
...
- (void)handleLongPress:(UIGestureRecognizer *)gestureRecognizer
{
if (gestureRecognizer.state != UIGestureRecognizerStateBegan)
return;
CGPoint touchPoint = [gestureRecognizer locationInView:mapView];
CLLocationCoordinate2D touchMapCoordinate = [mapView convertPoint:touchPoint toCoordinateFromView:mapView];
//add pin where user touched down...
MKPointAnnotation *pa = [[MKPointAnnotation alloc] init];
pa.coordinate = touchMapCoordinate;
pa.title = @"Hello";
[mapView addAnnotation:pa];
[pa release];
//add circle with 5km radius where user touched down...
MKCircle *circle = [MKCircle circleWithCenterCoordinate:touchMapCoordinate radius:5000];
[mapView addOverlay:circle];
}
-(MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id)overlay
{
MKCircleView* circleView = [[[MKCircleView alloc] initWithOverlay:overlay] autorelease];
circleView.fillColor = [UIColor redColor];
return circleView;
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *AnnotationIdentifier = @"Annotation";
MKPinAnnotationView* pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if (!pinView)
{
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
pinView.pinColor = MKPinAnnotationColorGreen;
pinView.animatesDrop = YES;
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
关于iphone - 从 MKMapView 上的用户交互创建覆盖?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/5223195/