Encode NSMutableArray - objective-c

Question

EDIT: Ok i decided to save the array in the userDefaults... should be easy, right ?
Save:
NSUserDefaults *userDefs = [NSUserDefaults standardUserDefaults];
[userDefs setObject:videoArray forKey:#"dataArray"];
[userDefs synchronize];
Load:
NSUserDefaults *userDefs = [NSUserDefaults standardUserDefaults];
videoArray = [[NSUserDefaults standardUserDefaults] mutableArrayValueForKey:#"dataArray"];
[tableview reloadData];
NSLog(#"%#",videoArray);
Class of the objects which are in the array:
#interface DEVideoModel : NSObject
#property (copy) NSString *name;
#property (copy) NSImage *thumbnail;
#property (copy) NSDictionary *qualities;
#property (readwrite) float videoSize;
#property (readwrite) float progress;
#property (copy) NSString *filePath;
#property (copy) NSDate *datum;
#end
#synthesize name,filePath,videoSize,qualities,thumbnail,datum,progress;
-(id)init {
self = [super init];
if(self) {
qualities = [[NSDictionary alloc]init];
thumbnail = [[NSImage alloc]init];
}
return self;
}
#end
And my videoArray is (null) when i load it ?! I don't get it. videoArray is a NSMutableArray not NSArray by the way.

Answer 1

IN your code you are writting NSData to NSCoder, so you need to read NSData then convert it to Array.
NSURL *appSupportDir = [[NSFileManager defaultManager] URLForDirectory:NSApplicationSupportDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:YES error:&error];
NSString *path = [NSString stringWithFormat:#"%#/DEConvert.dat",[appSupportDir path]];
NSLog(#"%#",appSupportDir);
NSData *data = [NSData dataWithContentsOfFile:path];
NSMutableArray *arr = [NSKeyedUnarchiver unarchiveObjectWithData:data];
to store object in NSUserDefault
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:arr];
[[NSUserDefaults standardUserDefaults] setObject:data forKey:#"your key"];
Unarchiving is just as easy:
NSData *NewData = [[NSUserDefaults standardUserDefaults] objectForKey:#"your key"];
NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithData:NewData];