ios - Editing data in a CoreData application -

i have application 4 view, main view view contain table view data, in view have 1 button add button add new data, if click on row have detailview , in view have button , if click have editview, want change data, when type data can't save that. code

-(void)save {     [self.ricettadamodificare setvalue:self.titoloricetta.text forkey:@"name"];     [self.ricettadamodificare setvalue:self.ingredientiricetta.text forkey:@"ingredient"];     [self.ricettadamodificare setvalue:self.preparazionericetta.text forkey:@"make"]; } 

i know must pass context when? thanks

you need call save on managed object context after have updated database objects:

-(void)save {      [self.ricettadamodificare setvalue:self.titoloricetta.text forkey:@"name"];     [self.ricettadamodificare setvalue:self.ingredientiricetta.text forkey:@"ingredient"];     [self.ricettadamodificare setvalue:self.preparazionericetta.text forkey:@"make"];      nserror *error;     [self.managedobjectcontext save:&error];      if (error) // handle save error }