如何在 iPhone 中滚动地图时跟踪地图区域

Question

我已完成以最大化缩放级别在 iPhone 中显示当前位置的地图视图。

但现在我想在地图视图中跟踪 任何滚动 以获取其可见区域。

如果是的话，是否有任何事件可以做到这一点？？

如果没有怎么可能？

Answer 1

是的，可以通过 mapView 的委托来实现。

- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated
{
    // This method is called whenever the currently displayed map region changes. 
    // During scrolling, this method may be called many times to report updates to the map position. 
    // Therefore, your implementation of this method should be as lightweight as possible to avoid affecting scrolling performance. 
   // *Straight from Apple's documentation

   MKMapRect visibleRect = [mapView visibleMapRect];
}