百度地图同时设置region和视角、旋转

注意animated的设置，否则会影响显示效果

[_mapView setRegion:region animated:NO];
BMKMapStatus *mapStatus = [[BMKMapStatus alloc] init];
mapStatus.fRotation = 0;
mapStatus.fOverlooking = 0;
mapStatus.targetGeoPt = region.center;
[_mapView setMapStatus:mapStatus withAnimation:YES];