如何在滾動時跟蹤地圖區域iPhone中的地圖

Question

我完成後將iPhone的地圖視圖顯示爲具有最大縮放級別的當前位置。

但現在我想跟蹤在地圖視圖中滾動以獲取其可見區域。

有沒有什麼事情要做，如果是的話怎麼樣？

如果沒有它如何可能？

Answer 1

是的，它可能通過mapView的委託。

- (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]; 
}