DHCCounter 0.0.1

DHCCounter 0.0.1

LangLanguage Obj-CObjective C
License MIT
ReleasedLast Release Dec 2014

Maintained by Unclaimed.

  • By
  • Daniel Haight

It counts events, then sends notifications to tell you how many times they happened. Incase you want to do both of those. please note the 0.0.X release at the moment, changes will be breaking… (But likely easy to deal with)



pro-tip use cocoapods

Drag DHCCounter.{m,h} to Xcode your favourite IDE.


Quick Example

//subscribe to the notification with the name "DHCEventCountChangeForEventName"+ your event name… this Example uses "MyEvent"
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gotMyEventNotification:) name:@"DHCEventCountChangeForEventNameMyEvent" object:nil];

//Bump the count
[DHCCounter bumpCountForEventName:@"MyEvent"];

//somewhere else //and we assume the count was previously 0
-(void)gotMyEventNotification:(NSNotification *)notification{
    NSLog(@"count for MyEvent: %i",[notification.userInfo objectForKey:@"count"]); // logs 'count for MyEvent: 1'

(un)subscribing to an event

when a count changes it is broadcast over NSNotificationCenter. So just follow the process of subscribing to an NSNotification.

You choose your event names and the name of the notification changes accordingly.

If you name your event CheckBalance then the notification posted to notification center will be called DHCEventCountChangeForEventNameCheckBalance or in code you might do something like this

NSString *const eventName = @"CheckBalance";

- (void)viewDidAppear:(BOOL)animated{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gotNotification:) name:[NSString stringWithFormat:@"DHCEventCountChangeForEventName%@",eventName] object:nil];

- (void)viewDidDisappear:(BOOL)animated{
    [[NSNotificationCenter defaultCenter] removeObserver:notificationCatcher name:[NSString stringWithFormat:@"DHCEventCountChangeForEventName%@",eventName] object:nil];

getting/ setting count

get count for eventName

NSInteger countForEvent=[DHCCounter countForEventName:@"someEventName"];

set count for eventName

there are a few ways to set count for convenience

NSString *[email protected]"someEventName"

[DHCCounter bumpCountForEventName:eventName]; //increases count by one

[DHCCounter increaseCountForEventName:eventName byInteger:6]; //increase by a given NSInteger eg. 6

[DHCCounter setCount:22 ForEventName:eventName] // set count to a given NSInteger eg. 22

Acting on a change

after subsctribing to a notification for a specific event notification and defining a seector (in our example: gotNotification:) , you receive an NSNotification as the input parameter… this seems like a sensible place to tell you the count of the event once it has been changed… so we do.

-(void)gotNotification:(NSNotification *)notification{
    NSInteger count=notification.userInfo objectForKey:@"count";

    if (count > 9000) { 
        //do your stuff once user has done a thing 9000 times


Takeaway point: the count of the event is contained in the userInfo dictionary of the NSNotification with the key @"count"