NSArrayM unrecognized selector error - ios

Question

I need some help understanding why I am getting an unrecognized selector error
I have a NSMutableDictionary
#interface CallDetailViewController () {
NSMutableDictionary * thisDictionary;
}
#end
That gets populated from the MasterTabController
- (void) some method {
thisDictionary = [[(MasterTabController *)self.tabBarController detailDictionary] mutableCopy];
NSLog(#"Check dictinoary: %#", [thisDictionary description]);
}
Outputting a description shows the data is there
Check dictinoary: (
{
DATEIN = "2015-12-11 13:33:41";
"ETA" = "2015-12-14 13:54:16";
RecordKey = 2961;
Destination = "Some address";
Location = "Some location";
} )
But when I try to access an object in it:
NSLog(#"Destination: %#", [thisDictionary objectForKey:#"Destination"]);
I get the following error.
-[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7a73f9a0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]:
unrecognized selector sent to instance 0x7a73f9a0'
The array is populated from a JSON value that returns an array of records called Record. After the JSON is returned, I pull out just section that contains the record.
NSDictionary * dictTowx = [NSDictionary dictionaryWithDictionary:[dictJSON objectForKey:#"ThisResponse"]];
NSDictionary * dictData = [NSDictionary dictionaryWithDictionary:[dictTowx objectForKey:#"Data"]];
NSArray * arrRecordSet = [dictData objectForKey:#"Recordset"];
NSDictionary * dicRecord= [arrRecordSet objectAtIndex:0];
self.detailDictionary = [dicRecord objectForKey:#"Record"];
The RAW JSON:
{
ThisResponse = {
Data = {
Recordset = (
{
Record = (
{
DATEIN = "2015-12-11 13:33:41";
"ETA" = "2015-12-14 13:54:16";
RecordKey = 2961;
Destination = "Some address";
Location = "Some location";
}
);
}
);
};
};
}
What am I doing wrong?

Answer 1

Please try to assign like this
self.detailDictionary = [[dicRecord objectForKey:#"Record"] objectAtIndex:0];
and then access like this
NSLog(#"Destination: %#", [thisDictionary objectForKey:#"Destination"]);
Enjoy programming.

Answer 2

- (void) some method {
thisDictionary = [[(MasterTabController *)self.tabBarController detailDictionary] mutableCopy];
NSLog(#"Check dictinoary: %#", [thisDictionary description]);
}
try replacing
thisDictionary = [[(MasterTabController *)self.tabBarController detailDictionary] mutableCopy];
with
thisDictionary = [[NSMutableDictionary alloc]initWithDictionary: [[{MasterTabController *)self.tabBarController detailDictionary] mutableCopy]]];
i think your problem may be you are not instantiating the dictionary before setting it to objects from another.