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copied!<p>You can store the collection of <code>Event</code> in <code>NSUserDefaults</code>. Since its a custom class, you need to implement <code>NSCoding</code> protocol for serialization to <code>NSUserDefaults</code>.</p> <pre><code>//Event.h @interface Event : NSObject<NSCoding> @property (nonatomic, copy) NSString *name; @property (nonatomic, strong) NSDate *time; @property (nonatomic) NSInteger repeat; - (void)save; + (NSArray *)allEvents; //Event.m #define kSavedEvents @"SavedEvents" #pragma mark - Encoding - (void)encodeWithCoder:(NSCoder *)encoder { [encoder encodeObject:self.name forKey:@"EventName"]; [encoder encodeObject:self.time forKey:@"EventTime"]; [encoder encodeObject:@(self.repeat) forKey:@"EventRepeat"]; } #pragma mark - Decoding - (id)initWithCoder:(NSCoder *)decoder { self = [super init]; if (self) { _name = [decoder decodeObjectForKey:@"EventName"]; _time = [decoder decodeObjectForKey:@"EventTime"]; _repeat = [[decoder decodeObjectForKey:@"EventRepeat"]integerValue]; } return self; } </code></pre> <p>You need to archive the data while storing to NSUserDefaults and unarchive when fetching</p> <pre><code> (void)save { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSData *savedData = [defaults objectForKey:kSavedEvents]; NSMutableArray *savedEvents = [@[] mutableCopy]; //Some events are already there in there if (savedData) { savedEvents = [[NSKeyedUnarchiver unarchiveObjectWithData:savedData]mutableCopy]; } [savedEvents addObject:self]; //Archiving the savedEvents to data NSData *newEventData = [NSKeyedArchiver archivedDataWithRootObject:savedEvents]; [defaults setObject:newEventData forKey:kSavedEvents]; [defaults synchronize]; } + (NSArray *)allEvents { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSData *data = [defaults objectForKey:kSavedEvents]; if (data) { return [NSKeyedUnarchiver unarchiveObjectWithData:data]; } return nil; } </code></pre> <p>Hope this will get you started.</p>

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