如何知道MKMapview setRegion：animated：已完成？

我想在我的MKMapView上设置一个区域，然后找到对应于地图的NE和SW角的坐标。如何知道MKMapview setRegion：animated：已完成？

This code works just fine to do that: 
//Recenter and zoom map in on search location 
MKCoordinateRegion region = {{0.0f, 0.0f}, {0.0f, 0.0f}}; 
region.center = mySearchLocation.searchLocation.coordinate; 
region.span.longitudeDelta = 0.01f; 
region.span.latitudeDelta = 0.01f; 
[self.mapView setRegion:region animated:NO]; //When this is set to YES it seems to break the coordinate calculation because the map is in motion 

//After the new search location has been added to the map, and the map zoomed, we need to update the search bounds 
//First we need to calculate the corners of the map so we get the points 
CGPoint nePoint = CGPointMake(self.mapView.bounds.origin.x + mapView.bounds.size.width, mapView.bounds.origin.y); 
CGPoint swPoint = CGPointMake((self.mapView.bounds.origin.x), (mapView.bounds.origin.y + mapView.bounds.size.height)); 

//Then transform those point into lat,lng values 
CLLocationCoordinate2D neCoord; 
neCoord = [mapView convertPoint:nePoint toCoordinateFromView:mapView]; 
CLLocation *neLocation = [[CLLocation alloc] initWithLatitude:neCoord.latitude longitude:neCoord.longitude]; 

CLLocationCoordinate2D swCoord; 
swCoord = [mapView convertPoint:swPoint toCoordinateFromView:mapView]; 
CLLocation *swLocation = [[CLLocation alloc] initWithLatitude:swCoord.latitude longitude:swCoord.longitude];

问题是我想将地图缩放为动画。但是，当我将setRegion：animated设置为YES时，最终会在放大地图时（即动画完成之前）从地图获取坐标。有什么方法可以获得动画完成的信号？

来源

2010-01-17 deadroxy

从未使用的mapkit，但MKMapViewDelegate有一个方法mapView:regionDidChangeAnimated:，看起来是你在找什么。

来源

2010-01-17 19:38:56 bmalicoat

愚蠢的我来说，这是在委托协议不是的MKMapView本身。我知道我曾经见过它......谢谢：D – deadroxy 2010-01-17 19:47:03

我知道这是超旧的，但为了防止其他人来寻找答案，这里有一个选择。

这个版本的好处在于，您可以在完成第一个完成动画时运行完成动画，而不是在回调方法中猜测/硬编码，因为该动画立即被调用。

[MKMapView animateWithDuration:1.0 animations:^{ 
    [mapView setRegion:mapRegion animated:YES]; 
} completion:^(BOOL finished) { 
    [UIView animateWithDuration:1.0 animations:^{ 
     self.mapDotsImageView.alpha = 1.0; 
    }]; 
}];

或只是

// zoom in... 
let km3:CLLocationDistance = 3000 
let crTight = MKCoordinateRegionMakeWithDistance(location.coordinate, km3, km3) 
MKMapView.animate(withDuration: 1.0, animations: { self.theMap.region = crTight })

来源

2016-07-30 00:23:29

如何知道MKMapview setRegion：animated：已完成？

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