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Offline definitionExpression

RobFisher

I am moving a working iOS application to incorporate offline features. I was using a definitionExpression on a feature layer to display only certain features when showing the map to simulate two different layers that share the same base table.

Moving the layer to a geodatabase and loading it as a AGSFeatureTableLayer I cannot seem to figure out how to replicate this filtering via a definitionExpression to show only one set of features on the map at a time.

Is this currently possible?

Thanks,
Rob

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Accepted answers

DiveshGoyal

We currently don't have a way to filter features using a definitionExpression on AGSFeatureTableLayer. We hope to add this in an upcoming release.

You can manually toggle the visibility of features by using setVisible:forFeature: on AGSFeatureTableLayer
See https://developers.arcgis.com/ios/api-reference/interface_a_g_s_feature_table_layer.html#a5528e486382e8b6688e3aacbc708d1cf

All comments

RobFisher

Is it even possible to set the visibility of offline features from an AGSFeatureTableLayer? I can get a NSArray of the features I want to hide but they get returned as an AGSGDBFeature which has no visibility property.

Perhaps I'm not accessing the features via the right method but I can't see how to make a feature invisible which seems wrong.

DiveshGoyal

MichaelDavis3

Are there any plans to implement a definition query functionality in the future?

Setting visibility works, but cycling through every feature in a large-ish layer (13,000 points) is proving to be quite resource intensive and slow when running on a device.

DiveshGoyal

Yes, its definitely something we want to provide.

MichaelDavis3

Thanks Divesh - From your answer I'll infer that this is something that might be in a future release, but probably won't be in this magical "Quartz" release Esri folks keep mentioning.

Nicholas-Furness

Hey Rob,

FYI: definitionExpression was added to AGSFeatureTableLayer in 10.2.5 of the ArcGIS Runtime SDK for iOS.

Release notes for 10.2.5—ArcGIS Runtime SDK for iOS

Cheers,

Nick.

MichaelDavis3

This is fantastic - thanks Nick!

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