swift - Xcode 8.1 UIDataSourceModelAssociation broken? -


i trying implement state restoration on core data project (swift) , having problems implementing uidatasourcemodelassociation protocol on data source uitableview in split view controller, wrapper class around nsfetchedresultscontroller.   code :

1   extension eventdataprovider : uidatasourcemodelassociation   2   {   3     public func modelidentifierforelement(at idx: indexpath, in view: uiview) -> string?   4     {   5       let elementatindexpath = self.fetchedresultscontroller.object(at: idx)   6      7       return string(describing: elementatindexpath.objectid.urirepresentation())   8     }   9     public func indexpathforelement(withmodelidentifier identifier: string, in view: uiview) -> indexpath?   10    {   11      if let url = url(string: identifier),   12         let objectid = self.fetchedresultscontroller.managedobjectcontext.persistentstorecoordinator?.managedobjectid(forurirepresentation: url),   13         let object = self.fetchedresultscontroller.managedobjectcontext.object(with: objectid) as? cdevent   14      {   15        return self.fetchedresultscontroller.indexpath(forobject: object) as nsindexpath?   16      }   17     18      return nil   19    }   20  }  

i getting exc_bad_instruction exception, stops debugger @ top of appdelegate class, on state restoration seems point problem "static foundation.indexpath._unconditionallybridgefromobjectivec (swift.optional<__objc.nsindexpath>) -> foundation.indexpath".

i use restorationarchivetool convert resulting data.data file savedstate folder plist command ".../restorationarchivetool  --plist --structured -o path/to/outputfile

if view resulting plist file preview, following :

kapplicationselectedcellindexpathskey...( "<nsindexpath: 0x7fe60054cb00> {length = 2, path = 0 - 3}")

... if open plist in xcode, following :

kapplicationselectedcellindexpathskey key ( value

presuming decoder uses same algorithm plist reader converting data file, not surprising kind of exception.

if remove uidatasourcemodelassociation extension, exception goes away.

can else confirm problem or have missed obvious?

your function has signature:

indexpathforelement(withmodelidentifier identifier: string, in view: uiview) -> indexpath?

thats why should cast return type indexpath instead of nsindexpath:

return self.fetchedresultscontroller.indexpath(forobject: object) nsindexpath?

to

return self.fetchedresultscontroller.indexpath(forobject: object) indexpath?

Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more