iOS版 - 的MKMapView - 可拖动的注解 [英] iOS - MKMapView - Draggable Annotations

问题描述

我有注释蓄势待发，但试图找出如何使它可拖动与我的code：

I have the annotation ready to go, but trying to figure out on how to make it draggable with my code:

-(IBAction) updateLocation:(id)sender{

MKCoordinateRegion newRegion;

newRegion.center.latitude = mapView.userLocation.location.coordinate.latitude;
newRegion.center.longitude = mapView.userLocation.location.coordinate.longitude;

newRegion.span.latitudeDelta = 0.0004f;
newRegion.span.longitudeDelta = 0.0004f;

[mapView setRegion: newRegion animated: YES];


CLLocationCoordinate2D coordinate;
coordinate.latitude = mapView.userLocation.location.coordinate.latitude;
coordinate.longitude = mapView.userLocation.location.coordinate.longitude;

MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];

[annotation setCoordinate: coordinate];
[annotation setTitle: @"Your Car is parked here"];
[annotation setSubtitle: @"Come here for pepsi"];


[mapView addAnnotation: annotation];
[mapView setZoomEnabled: YES];
[mapView setScrollEnabled: YES];

}

在此先感谢！

推荐答案

要做出注解拖动，设置注释的视图的拖动属性是。

To make an annotation draggable, set the annotation view's draggable property to YES.

这是在 viewForAnnotation 委托方法正常​​完成。

This is normally done in the viewForAnnotation delegate method.

例如：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;

    static NSString *reuseId = @"pin";
    MKPinAnnotationView *pav = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:reuseId];
    if (pav == nil)
    {
        pav = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseId];
        pav.draggable = YES;
        pav.canShowCallout = YES;
    }
    else
    {
        pav.annotation = annotation;
    }

    return pav;
}

结果
如果您需要在用户停止拖动并删除批注处理，请参阅：结果
<一href=\"http://stackoverflow.com/questions/3998765/how-to-manage-drag-and-drop-for-mkannotationview-on-ios\">how管理拖放进行MKAnnotationView在IOS？

结果
此外，您的注释对象（一个实现 MKAnnotation ）应该有一个可设置协调属性。您正在使用 MKPointAnnotation 类，它的确实现了 setCoordinate 所以这部分的已经照顾。

In addition, your annotation object (the one that implements MKAnnotation) should have a settable coordinate property. You are using the MKPointAnnotation class which does implement setCoordinate so that part's already taken care of.

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