iphone - Core Data Duplicating TableView Cells Upon App Launch -

-

when relaunch app, cells in table view duplicated. otherwise fine when being added , deleted, etc.

here code:

@implementation routinetableviewcontroller  @synthesize routinetableview; @synthesize eventsarray; @synthesize entered; @synthesize managedobjectcontext;  #pragma mark - view lifecycle  - (void)viewdidload {     if (managedobjectcontext == nil)      {          managedobjectcontext = [(curlappdelegate *)[[uiapplication sharedapplication] delegate] managedobjectcontext];      }      nsfetchrequest *request = [[nsfetchrequest alloc] init];     nsentitydescription *entity = [nsentitydescription entityforname:@"routine" inmanagedobjectcontext:managedobjectcontext];     [request setentity:entity];      nserror *error = nil;     nsmutablearray *mutablefetchresults = [[managedobjectcontext executefetchrequest:request error:&error] mutablecopy];     if (mutablefetchresults == nil) {         // handle error.     }     [self seteventsarray:mutablefetchresults];     [mutablefetchresults release];     [request release];      uibarbuttonitem * addbutton = [[uibarbuttonitem alloc] initwithbarbuttonsystemitem:uibarbuttonsystemitemadd target:self action:@selector(showprompt)];     [self.navigationitem setleftbarbuttonitem:addbutton];     [addbutton release];      uibarbuttonitem *editbutton = [[uibarbuttonitem alloc]initwithtitle:@"edit" style:uibarbuttonitemstylebordered target:self action:@selector(toggleedit)];     self.navigationitem.rightbarbuttonitem = editbutton;     [editbutton release];      [super viewdidload]; }  - (void)viewdidunload {     self.eventsarray = nil;     [super viewdidunload]; }  -(void)toggleedit {     [self.routinetableview setediting: !self.routinetableview.editing animated:yes];      if (self.routinetableview.editing)         [self.navigationitem.rightbarbuttonitem settitle:@"done"];     else         [self.navigationitem.rightbarbuttonitem settitle:@"edit"]; }  - (void)dealloc {     [managedobjectcontext release];     [eventsarray release];     [entered release];     [super dealloc]; }  - (void)didreceivememorywarning {     [super didreceivememorywarning]; }  #pragma mark - #pragma mark add event  -(void)addevent {         routine *routine = (routine *)[nsentitydescription insertnewobjectforentityforname:@"routine" inmanagedobjectcontext:managedobjectcontext];      routine.name=entered;      nserror *error = nil;     if (![managedobjectcontext save:&error]) {         // handle error.     }     nslog(@"%@", error);      /*     [eventsarray insertobject:routine atindex:0];      nsindexpath *indexpath = [nsindexpath indexpathforrow:0 insection:0];      [self.routinetableview insertrowsatindexpaths:[nsarray arraywithobject:indexpath] withrowanimation:uitableviewrowanimationfade];      [self.routinetableview scrolltorowatindexpath:[nsindexpath indexpathforrow:0 insection:0] atscrollposition:uitableviewscrollpositiontop animated:yes];      */      }  -(void)showprompt {     alertprompt *prompt = [alertprompt alloc];     prompt = [prompt initwithtitle:@"add workout day" message:@"\n \n please enter title workout day" delegate:self cancelbuttontitle:@"cancel" okbuttontitle:@"add"];     [prompt show];     [prompt release]; }  - (void)alertview:(uialertview *)alertview willdismisswithbuttonindex:(nsinteger)buttonindex {       if (buttonindex != [alertview cancelbuttonindex])     {         entered = [(alertprompt *)alertview enteredtext];          if(eventsarray && entered)         {             routine *temproutine = (routine *)[nsentitydescription insertnewobjectforentityforname:@"routine" inmanagedobjectcontext:managedobjectcontext];              temproutine.name = entered;             [eventsarray addobject:temproutine];             [routinetableview reloaddata];             [self addevent];             nslog(@"temproutine.name is: %@",temproutine.name);         }     } }  #pragma mark - table view data source  - (nsinteger)numberofsectionsintableview:(uitableview *)tableview {     return 1; }  - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {     return [eventsarray count]; }  - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *cellidentifier = @"cell";      uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:cellidentifier];      if (cell == nil)     {         cell = [[[uitableviewcell alloc] initwithstyle:uitableviewcellstylesubtitle reuseidentifier:cellidentifier] autorelease];     }      routine *temproutine = (routine *)[eventsarray objectatindex:indexpath.row];     cell.textlabel.text = temproutine.name;     cell.accessorytype = uitableviewcellaccessorydisclosureindicator;      return cell; }  // override support conditional editing of table view. - (bool)tableview:(uitableview *)tableview caneditrowatindexpath:(nsindexpath *)indexpath {     // return no if not want specified item editable.     return yes; }  -(void)tableview:(uitableview *)tableview commiteditingstyle:(uitableviewcelleditingstyle)editingstyle forrowatindexpath:(nsindexpath *)indexpath  {       if (editingstyle == uitableviewcelleditingstyledelete) {           // delete managed object @ given index path.          nsmanagedobject *eventtodelete = [eventsarray objectatindex:indexpath.row];          [managedobjectcontext deleteobject:eventtodelete];           // update array , table view.          [eventsarray removeobjectatindex:indexpath.row];          [tableview deleterowsatindexpaths:[nsarray arraywithobject:indexpath] withrowanimation:yes];           // commit change.          nserror *error = nil;          if (![managedobjectcontext save:&error]) {              // handle error.          }      }

i think, adding twice....

routine *temproutine = (routine *)[nsentitydescription insertnewobjectforentityforname:@"routine" inmanagedobjectcontext:managedobjectcontext];              temproutine.name = entered;         ---->    [eventsarray addobject:temproutine];             [routinetableview reloaddata];          ---->   [self addevent]; //comment line in alertviewdelegate

or can use following code changes..... may have syntax error

- (void)alertview:(uialertview *)alertview willdismisswithbuttonindex:(nsinteger)buttonindex {       if (buttonindex != [alertview cancelbuttonindex])     {         entered = [(alertprompt *)alertview enteredtext];          if(eventsarray && entered)         {            [self addevent];          }     } }   -(void)addevent {         routine *routine = (routine *)[nsentitydescription insertnewobjectforentityforname:@"routine" inmanagedobjectcontext:managedobjectcontext];      routine.name=entered;      nserror *error = nil;     if (![managedobjectcontext save:&error]) {         // handle error.     }     nslog(@"%@", error);       [eventsarray addobject:routine];      nsindexpath *indexpath = [nsindexpath indexpathforrow:[eventsarray count] insection:0];      [self.routinetableview insertrowsatindexpaths:[nsarray arraywithobject:indexpath] withrowanimation:uitableviewrowanimationfade];      [self.routinetableview scrolltorowatindexpath:[nsindexpath indexpathforrow:0 insection:0] atscrollposition:uitableviewscrollpositiontop animated:yes];       }

thanks,


Comments

Post a Comment

Popular posts from this blog

php - What is the difference between $_SERVER['PATH_INFO'] and $_SERVER['ORIG_PATH_INFO']? -

-
what’s difference between $_server['path_info'] , $_server['orig_path_info'] ? how use them? when run print_r($_server) , path_info , orig_path_info not present in array. why not? how can enable them? i have read php manual on them, still don’t understand them. the path_info variable present if invoke php script this: http://www.example.com/phpinfo.php/hello_there it's /hello_there part after .php script. if don't invoke url that, there won't $_server["path_info"] environment variable. the porig_ prefix uncommon. path_info standard cgi-environment variable, , should never prefixed. did read that? (there issues around php3/php4 if invoked php interpreter via cgi-bin/ - hardly has such setups today.) for reference: http://www.ietf.org/rfc/rfc3875
Read more

fortran - Function return type mismatch -

-
i'm attempting recode old c++ program in fortran make use of lapack (i'm aware c++ have lapack++, i'm having lot of trouble installing it, gave up). i didn't have problems compilation, when had variables declared real . when started coding section of program required lapack, found parameters passed dsyev need double precision . tried change double precision (including changing hard coded numbers double precision counterparts, i.e. 0.0 -> 0.0d0) when try compile, following error of functions , subroutines i've written: error: return type mismatch of function <function> @ (1) (real(4)/real(8)) i'm not sure coming from, in program has been changed double precision. for example, i've declared following: double precision :: alpha(3),d(3),zeta1,zeta2 double precision :: a1(3),a2(3),d1(3),d2(3) double precision :: pi pi = 3.14159265359d0 alpha = (/0.109818d0, 0.405771d0, 2.22766d0/) d = (/0.444635d0, 0.535328d0, 0.154329d0 /) 10 i=1,3 ...
Read more

queue - mq_receive: message too long -

-
i implementing communication between 2 processes using queue. problem when call function mq_receive, error: message long. i have done following: struct mq_attr attr; long size = attr.mq_msgsize; .... // initializing queue "/gateway" int rc = mq_receive(gateway, buffer, size, &prio); if print size value, size=1, while when print same size program (got same mechanism), not long integer ( -1217186280 )... how can solve error?....so while size = 1, believe it's right "message long" why 1? p.s. have tried put : int rc = mq_receive(gateway, buffer, sizeof(buffer), &prio); but no result. it seems need read docs more carefully. when call mq_receive should pass size of destination buffer. this size must greater mq_msgsize attribute of queue . in addition, seems have error in queue attributes initialisation makes proper mq_receive call impossible. here standard message queue session: fill mq_attr struct ( doc ): struct mq_a...
Read more