On your Player class, implement the following two methods (substituting calls to encodeObject with something relevant to your own object):
- (void)encodeWithCoder:(NSCoder *)encoder {
//Encode properties, other class variables, etc
[encoder encodeObject:self.question forKey:@"question"];
[encoder encodeObject:self.categoryName forKey:@"category"];
[encoder encodeObject:self.subCategoryName forKey:@"subcategory"];
}
- (id)initWithCoder:(NSCoder *)decoder {
if((self = [super init])) {
//decode properties, other class vars
self.question = [decoder decodeObjectForKey:@"question"];
self.categoryName = [decoder decodeObjectForKey:@"category"];
self.subCategoryName = [decoder decodeObjectForKey:@"subcategory"];
}
return self;
}
Reading and writing from NSUserDefaults
:
- (void)saveCustomObject:(MyObject *)object key:(NSString *)key {
NSData *encodedObject = [NSKeyedArchiver archivedDataWithRootObject:object];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:encodedObject forKey:key];
[defaults synchronize];
}
- (MyObject *)loadCustomObjectWithKey:(NSString *)key {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *encodedObject = [defaults objectForKey:key];
MyObject *object = [NSKeyedUnarchiver unarchiveObjectWithData:encodedObject];
return object;
}
Code shamelessly borrowed from: saving class in nsuserdefaults