topic Re: Files missing from Online-Offline Editing Sample in ArcGIS Runtime SDK for iOS Questions

Files missing from Online-Offline Editing Sample

Chrisvan_Aart — Mon, 28 May 2012 05:50:42 GMT

Hi Guys,

For a client we are building a sketching app that has to work in online-offline modus.
The app needs to be able to start without contacting any feature layers.

The Online-Offline Editing Sample gives us clues how to work with feature layers in offline modus by loading the feature definition from local files.

In OnlineOfflineFeatureLayer.m there is
---
- (id)initWithURL:(NSURL *)url mode:(AGSFeatureLayerMode)mode online:(BOOL)online{
   if (self.bOnline)
        {
         ...

        }
        else {
            //restore features from saved feature store...

            NSDictionary *featureLayerDefinition = [self readFeatureLayerDefinition];
            NSDictionary *featureSetDictionary = [self readFeatureSet];
--

So the method readFeatureLayerDefinition is going to load a definition from a local file:
---
-(NSDictionary *)readFeatureLayerDefinition
{
    NSError *error = nil;
    NSDictionary *flDefinition = nil;

    NSString *filename = [self featureLayerDefinitionFilename];
    if ([[NSFileManager defaultManager] fileExistsAtPath:filename]) {
NSString *flDefinitionString = [NSString stringWithContentsOfFile:filename encoding:NSUnicodeStringEncoding error:&error];

        flDefinition = (NSDictionary *)[flDefinitionString AGSJSONValue];
    }

return flDefinition;
}
---

featureLayerDefinitionFilename reads:
static NSString *kFlDefinitionFileName = @"FeatureLayerDictionary";

This file (next to static NSString *kFeatureSetFileName = @"FeatureSet";) is missing from the sample project.

Can you send/put these files online?

Thanks!

--

Chris van Aart
2CoolMonkeys

Re: Files missing from Online-Offline Editing Sample

RickJones — Mon, 28 May 2012 15:23:54 GMT

Those files are generated by the sample when you go offline.

Re: Files missing from Online-Offline Editing Sample

Chrisvan_Aart — Mon, 28 May 2012 16:34:24 GMT

The point is that the app needs to coldstart in offline modus.
So it needs to work without ever contacting the ARCGis server

Do you have a sample of the contents of the files? Or can one extract the files from a feature layer of ARCGis server?

Re: Files missing from Online-Offline Editing Sample

RickJones — Tue, 29 May 2012 12:55:28 GMT

I had to add .txt to the filenames to upload them. They normally have no extension.

Edit: Of course, you can modify the onlineoffline class to use whatever path and filename you want.

Re: Files missing from Online-Offline Editing Sample

KirstenBeyer — Sat, 14 Jul 2012 19:19:05 GMT

Hi Chris,

Did you find a solution to this problem?

We are also trying to create an ios app that works in offline mode, without contacting server. We need code to read in/access the feature layer data. We have imported .tpk files without problems, but the feature layer is more complicated. Is there a way to bring in map package (.mpk) files, or another feature format, offline?

Thanks!
K.B.

The point is that the app needs to coldstart in offline modus.
So it needs to work without ever contacting the ARCGis server

Do you have a sample of the contents of the files? Or can one extract the files from a feature layer of ARCGis server?

Re: Files missing from Online-Offline Editing Sample

LeiQingtian — Thu, 09 Aug 2012 06:40:55 GMT

I also have the same function is a FeatureLayer of how offline when custom and I do not know a friend you achieve.Can you tell me under realistic idea of �??�??it?Thank you very much!