ios - Why does VerificationController crash inside of didReceiveData -

here function crashes. exact line of code 1 with: removeobjectforkey. when test function empty crashes on removeobjectforkey. note: i'm passing in empty function callback. currently, have arc off, need turn on? if possible, arc off, because turning on mean dealing alot of compile issues.

the function non-retained objects, hence memory issue.

- (void)connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data {     nsstring *responsestring = [[nsstring alloc] initwithdata:data encoding:nsutf8stringencoding];      // got receipt data. check out?     bool isok = [self doestransactioninfomatchreceipt:responsestring];      verifycompletionhandler completionhandler = _completionhandlers[[nsvalue valuewithnonretainedobject:connection]];     [_completionhandlers removeobjectforkey:[nsvalue valuewithnonretainedobject:connection]];      if (isok)     {         //validation suceeded. unlock content here.         nslog(@"validation successful");         completionhandler(true);      } else {         nslog(@"validation failed");         completionhandler(false);     } } 

here verificationcontroller usage:

    [[verificationcontroller sharedinstance] verifypurchase:transaction completionhandler:^(bool success) {         if (success) {              nslog(@"hi, success.");             [self testmethod];         } else {             nslog(@"payment not authorized.");         }     }];          }  - (void) testmethod {  } 

i use __weak have turn on arc, i'm trying avoid. note: verificaitioncontroller works when put inside other classes/objects, put in inapppurchasemanager blows anytime tries access self. self points instance of inapppurchasemanager defined (its phonegap plugin):

@interface inapppurchasemanager : cdvplugin <skpaymenttransactionobserver> {  } 

i ran problem fixed issue way main issue when setting value completion handler in verifypurchase method setting nil value find line in verifypurchase method

  _completionhandlers[[nsvalue valuewithnonretainedobject:conn]] = completionhandler; 

and replace with

 [_completionhandlers setobject:[completionhandler copy] forkey:[nsvalue valuewithnonretainedobject:conn]]; 

and find connectiondidreceivedata method , replace

- (void)connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data {     nsstring *responsestring = [[nsstring alloc] initwithdata:data encoding:nsutf8stringencoding];      // got receipt data. check out?     bool isok = [self doestransactioninfomatchreceipt:responsestring];       if (_completionhandlers && [_completionhandlers respondstoselector:@selector(removeobjectforkey:)])     {         verifycompletionhandler completionhandler = _completionhandlers[[nsvalue valuewithnonretainedobject:connection]];         [_completionhandlers removeobjectforkey:[nsvalue valuewithnonretainedobject:connection]];         if (isok)         {             //validation suceeded. unlock content here.             nslog(@"validation successful");             completionhandler(true);          } else {             nslog(@"validation failed");             completionhandler(false);         }      }     //[_completionhandlers removeobjectforkey:[nsvalue valuewithnonretainedobject:connection]];    } 

hope may , saves alot of time.