是否可以在 MKAnnotationView 而不是 MKPinAnnotationView 中调用 animatesDrop? [英] Is it possible to call animatesDrop in a MKAnnotationView rather than MKPinAnnotationView?

问题描述

您是否知道 MKPinAnnotationView 有一个方法animatesDrop"来动画从顶部到地图上带有阴影的点的图钉注释?好的，是否可以使用自定义图像来执行此操作??

do you know that MKPinAnnotationView has a method "animatesDrop" to animate a pin annotation from the top to point on the map with a shadow? OK, is it possible do this with a custom image??

推荐答案

您始终可以在 MKMapViewDelegate 方法中进行自定义动画.

You can always do your custom animation in MKMapViewDelegate method.

- (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views

可能是这样的(你不会得到花哨的阴影动画，如果你想要它，你需要自己做):

Probably something like that (you won't get the fancy shadow animation, if you want it you need to do it yourself) :

- (void) mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views {
    CGRect visibleRect = [mapView annotationVisibleRect]; 
    for (MKAnnotationView *view in views) {
       CGRect endFrame = view.frame;

       CGRect startFrame = endFrame; startFrame.origin.y = visibleRect.origin.y - startFrame.size.height;
       view.frame = startFrame;

       [UIView beginAnimations:@"drop" context:NULL]; 
       [UIView setAnimationDuration:1];

       view.frame = endFrame;

       [UIView commitAnimations];
    }
}

Swift 版本

func mapView(mapView: MKMapView, didAddAnnotationViews views: [MKAnnotationView]) {
    let visibleRect = mapView.annotationVisibleRect

    for view:MKAnnotationView in views{
        let endFrame:CGRect = view.frame
        var startFrame:CGRect = endFrame
        startFrame.origin.y = visibleRect.origin.y - startFrame.size.height
        view.frame = startFrame;

        UIView.beginAnimations("drop", context: nil)
        UIView.setAnimationDuration(1)

        view.frame = endFrame;

        UIView.commitAnimations()
    }
}

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