获取数据的代码block内,做界面的刷新
[arr1 addObject:pointAnnotation];
[_mapView addAnnotation:pointAnnotation];
[_mapView showAnnotations:arr1 animated:YES];
获取数据的代码block内,做界面的刷新
[arr1 addObject:pointAnnotation];
[_mapView addAnnotation:pointAnnotation];
[_mapView showAnnotations:arr1 animated:YES];
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