Some of NSCoding variables are NOT retrieved - ios

Question

I am using an NSData to store an object for later use. It has quite a few NSStrings and I need to pull it out of an object.
For some reason, only some of the NSStrings are stored and some others get zeroed out!
I was thinking it must be something with my code, that I must have forgotten to initialize some string, but for a very weird reason some of the strings lose the data!
I can't get theImportantString to get it's relevant value because it first seems like the variable got it's value, but after coming back from Unarchive, it's equal to #""!
// CMyData.h
/////////////////////
#interface CMyData : NSObject <NSCoding>
{
NSString *ID;
NSString *DIST;
.
.
}
#property (nonatomic,retain) NSString *ID;
#property (nonatomic,retain) NSString *DIST;
#end
// CMyData.m
//////////////////////
#import "CMyData.h"
#implementation CMyData
#synthesize ID;
#synthesize DIST;
- (id)initWithCoder:(NSCoder *)decoder {
if (self = [super init]) {
self.ID = [decoder decodeObjectForKey:#"ID"];
self.DIST = [decoder decodeObjectForKey:#"DIST"];
.
.
}
- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:ID forKey:#"ID"];
[encoder encodeObject:DIST forKey:#"DIST"];
.
.
}
- (void)dealloc {
[ID release];
[DIST release];
[super dealloc];
}
#end
MyController.m
-(void) makeObject: (NSDictionary *)dict
{
CMyData* myData=[[CMyData alloc] init];
myData.ID = [[NSString alloc] initWithString:[dict objectForKey:#"NAME"]];
myData.DIST = [[NSString alloc] initWithString:[dict objectForKey:#"DISTRIBUTOR"]];
.
.
myObject = [[[MYObject alloc] init];
myObject.data = [NSKeyedArchiver archivedDataWithRootObject:myData];
}
And then a tap on a button happens:
- (void) tapOnIcon: (MyObject*)theObject
{
CMyData *data = [NSKeyedUnarchiver unarchiveObjectWithData:theObject.data];
[delegate showData:data];
}
in the delegate Controller (Where the value can't be set anymore):
delegateController.m
/////////////////////////////////
-(void) showData:(CMyData*)theData{
self.theImportantString = [[NSString alloc] initWithString:theData.DIST];
.
.
.
}

Answer 1

Seems you have types mismatch:
// in - (id)initWithCoder:(NSCoder *)decoder
self.DIST = [decoder decodeIntForKey:#"DIST"];
but in declaration you have
// in CMyData.h
NSString *DIST;
This should be:
// in - (id)initWithCoder:(NSCoder *)decoder
self.DIST = [NSString stringWithFormat:#"%d", [decoder decodeIntForKey:#"DIST"]];