项目用了百度地图，然后想一进入地图页面，就让pinview显示气泡，不用等用户点击再显示
我试了下面的方式，没效果

-(BMKAnnotationView *)mapView:(BMKMapView *)mapView viewForAnnotation:(id)annotation{ if ([annotation isKindOfClass:[BMKPointAnnotation class]]) { BMKPinAnnotationView *pin = [[BMKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:@"annotation"]; pin.pinColor = BMKPinAnnotationColorRed; // [pin setSelected:YES]; // pin.canShowCallout = YES; // [pin setSelected:YES animated:NO]; return pin; } return nil; }