ios - Core Data unrecognized selector error -



ios - Core Data unrecognized selector error -

i using core info save strings. have next class called results

results.h

#import <coredata/coredata.h> @interface results : nsmanagedobject @property(nonatomic, retain) nsstring *lessondate; @property(nonatomic, retain) nsstring *lesson; @property(nonatomic, retain) nsstring *location; @property(nonatomic, retain) nsstring *start; @property(nonatomic, retain) nsstring *end; @end

results.m

#import "results.h" @implementation results @dynamic lessondate; @dynamic lesson; @dynamic location; @dynamic start; @dynamic end; @end

the next code perform save:

-(void)savelesson{ results *result = (results *)[nsentitydescription insertnewobjectforentityforname:@"diary" inmanagedobjectcontext:managedobjectcontext]; result.lessondate = calendardatestring; result.lesson = [nsstring stringwithformat:@"%@", lessontext.text]; result.location = [nsstring stringwithformat:@"%@", locationtest.text]; result.start = [nsstring stringwithformat:@"%@", starttimetext.text]; result.end = [nsstring stringwithformat:@"%@", endtimetext.text]; nserror *error; // here's actual save happens, , if doesn't print out console if (![managedobjectcontext save:&error]) { nslog(@"problem saving: %@", [error localizeddescription]); } [self dismissviewcontrolleranimated:yes completion:nil];

}

but when seek save info in app, app crashed , shows these errors

2013-02-18 11:46:25.705 after managedobjectcontext: <nsmanagedobjectcontext: 0x1f892480> 2013-02-18 11:46:33.762 -[nsmanagedobject setlesson:]: unrecognized selector sent instance 0x1f80b380 2013-02-18 11:46:33.764 *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[nsmanagedobject setlesson:]: unrecognized selector sent instance 0x1f80b380'

can please tell me why crashing? exact same code in app , works fine.

you creating entity different expect.

you calling

[nsentitydescription insertnewobjectforentityforname:@"diary" inmanagedobjectcontext:managedobjectcontext];

which creates entity diary. set @"results" first argument method.

while assigning created diary entity results object, syntactic sugar—the real object underneath have passed entity name. diary object doesn't have lesson property, , exception.

ios core-data nsmanagedobject

Comments

Post a Comment

Popular posts from this blog

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer -

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer - when trying request rest service @ time of response getting exception.. feb 21, 2013 2:34:49 pm com.sun.jersey.spi.container.containerresponse mapmappablecontainerexception severe: exception contained within mappablecontainerexception not mapped response, re-throwing http container java.lang.noclassdeffounderror: not initialize class net.sf.cglib.proxy.enhancer @ org.hibernate.proxy.pojo.cglib.cgliblazyinitializer.getproxyfactory(cgliblazyinitializer.java:117) @ org.hibernate.proxy.pojo.cglib.cglibproxyfactory.postinstantiate(cglibproxyfactory.java:43) @ org.hibernate.tuple.entity.pojoentitytuplizer.buildproxyfactory(pojoentitytuplizer.java:162) @ org.hibernate.tuple.entity.abstractentitytuplizer.<init>(abstractentitytuplizer.java:135) @ org.hibernate.tuple.entity.pojoentitytuplizer.<init>(pojoentitytuplizer.java:55) @ org.hibernate.tuple.e...
Read more

Accessing MATLAB's unicode strings from C -

Accessing MATLAB's unicode strings from C - how can access underlying unicode info of matlab strings through matlab engine or mex c interfaces? here's example. let's set unicode characters in utf-8 encoded file test.txt, read as fid=fopen('test.txt','r','l','utf-8'); s=fscanf(fid, '%s') in matlab. now if first feature('defaultcharacterset', 'utf-8') , c engevalstring(ep, "s") , output text file utf-8. proves matlab stores unicode internally. if mxarraytostring(enggetvariable(ep, "s")) , unicode2native(s, 'latin-1') give me in matlab: non-latin-1 characters replaced character code 26. need getting access underlying unicode info c string in unicode format (utf-8, utf-16, etc.), , preserving non-latin-1 characters. is possible? my platform os x, matlab r2012b. addendum: documentation explicitly states "[mxarraytostring()] supports multibyte encoded characters...
Read more

javascript - mongodb won't find my schema method in nested container -

javascript - mongodb won't find my schema method in nested container - i trying access method of schema stored within mixed container. here situation : have cases model can many different things, have schema each of these things stored in "casecontent" mixed property. var caseschema = mongoose.schema({ casecontent : {}, object : {type:string, default : "null"}, collision : {type : boolean, default : false} }); the casecontent property filled model of 1 of schemas, 1 exemple : var treeschema = new mongoose.schema({ applecount : {type : number, default : 3} }); treeschema.methods.dostuff = function (data) { console.log('hey, listen'); homecoming true; }; then, want utilize method of schema original container : caseschema.methods.dostuff = function (data) { if (this.casecontent.dostuff !== undefined) { this.casecontent.dostuff(); console.log('it worked'); } else { ...
Read more