//各个点一屏显示-(void)mapViewFitAnnotatiosa:(NSMutableArray*)locations{
if (locations.count < 2) return;
CLLocationCoordinate2D coor ;//= [locations[0] coordinate];
coor.latitude = self.latitue;
coor.longitude = self.longitude;
BMKMapPoint pt = BMKMapPointForCoordinate(coor);
CGFloat ltX, ltY, rbX, rbY;
ltX = pt.x, ltY = pt.y;
rbX = pt.x, rbY = pt.y;
for (int i = 0; i < locations.count; i++) {
CLLocationCoordinate2D coordinate;
BMKPoiInfo* poi = [self.poiResultArray objectAtIndex:i];
coordinate.latitude = poi.pt.latitude;
coordinate.longitude = poi.pt.longitude;
BMKMapPoint pt = BMKMapPointForCoordinate(coordinate);
if (pt.x < ltX) ltX = pt.x;
if (pt.x > rbX) rbX = pt.x;
if (pt.y > ltY) ltY = pt.y;
if (pt.y < rbY) rbY = pt.y;
}
BMKMapRect rect;
rect.origin = BMKMapPointMake(ltX , ltY);
rect.size = BMKMapSizeMake(rbX - ltX, rbY - ltY);
[self.baiDuMapView setVisibleMapRect:rect];
self.baiDuMapView.zoomLevel = self.baiDuMapView.zoomLevel - 0.3;
}
