ios-Baidu Map _ the latitude and longitude in the range displayed in the screen

Latitude and longitude of the center point of the current screen

CGFloat centerlongitude = self.mapView.region.center.longitude;

CGFloat centerlatitude = self.mapView.region.center.latitude;

Latitude and longitude of the current screen display range

Cllocationdegrees Pointsslongitudedelta = Self.mapView.region.span.longitudeDelta;

Cllocationdegrees Pointsslatitudedelta = Self.mapView.region.span.latitudeDelta;

Upper left corner

CGFloat leftuplong = centerlongitude-pointsslongitudedelta/2.0;

CGFloat Leftuplati = centerlatitude-pointsslatitudedelta/2.0;

upper right corner

CGFloat Rightuplong = centerlongitude + pointsslongitudedelta/2.0;

CGFloat Rightuplati = centerlatitude-pointsslatitudedelta/2.0;

Lower left corner

CGFloat leftdownlong = centerlongitude-pointsslongitudedelta/2.0;

CGFloat Leftdownlati = centerlatitude + pointsslatitudedelta/2.0;

Lower right corner

CGFloat Rightdownlong = centerlongitude + pointsslongitudedelta/2.0;

CGFloat Rightdownlati = centerlatitude + pointsslatitudedelta/2.0;

NSLog (@ "\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \%f,%f-----\ r%f,%f", Leftuplong,leftuplati,rightuplong,rightu%f,%f--------- Plati,leftdownlong,leftdownlati,rightdownlong,rightdownlati);

ios-Baidu Map _ the latitude and longitude in the range displayed in the screen