iphone - @property scope issues and memory problems -

i having crash not understand. downloading couple files remote server, , when file has finished downloading, attempting retrieve object attached request object.

tia help!

s.

main class

for (trainingentry* _entry in objects) {      httprequest * request = [httprequest requestwithurl:[nsurl urlwithstring:[nsstring stringwithformat:@"%@/%@", [[configloader config] objectforkey:@"server"], _entry.url]]];     [request setdownloaddestinationpath:[nsstring stringwithformat:@"%@/%@", documentsdirectorypath, _entry.filename]];      [request setentry:_entry];     [request setraw:_entry.title];      trainingentry * test = (trainingentry*)[request _entry];     nslog(@"title: %@", [test title]); //<= works     nslog(@"filename: %@", [test filename]); //<= works      [[self networkqueue] addoperation:request];  }  // start queue [[self networkqueue] go];  ... - (void)requestfinished:(httprequest *)request {      if ([[self networkqueue] requestscount] == 0) {         [self setnetworkqueue:nil];      }      nslog(@"req: %@", [request raw]);     nslog(@"title: %@", [[request entry] title]); // <= works     nslog(@"filename: %@", [[request entry] filename]); // <= crashes  } 

httprequest object

@interface httprequest : asihttprequest {  }  @property (nonatomic, retain) trainingentry * entry;  @property (nonatomic, retain) nsstring * raw;  @end 

trainingentry class

@interface trainingentry : nsobject {     nsstring * title;        nsstring * filename; }  @property (nonatomic, retain) nsstring * title; @property (nonatomic, retain) nsstring * filename; 

something may giving trouble not having copy in property declaration. should consider using copy objects conform nscopying protocol specification, nsstring , other collection classes.

in past, changing retain copy nsstring property solved similar issue me.

edit: research

this post may clarify why should use copy on retain immutable objects.