RNTimer

Simple GCD-based timer based on NSTimer. It starts immediately and stops when released. This avoids many of the typical problems with NSTimer:

• RNTimer runs in all modes (unlike NSTimer)
• RNTimer runs when there is no runloop (unlike NSTimer)
• Repeating RNTimers can easily avoid retain loops (unlike NSTimer)

Currently there is only a simple repeating timer (since this is the most common use that's hard to do correctly with NSTimer). It always runs on the main queue.

USAGE

__weak id weakSelf = self;
self.timer =
    [RNTimer repeatingTimerWithTimeInterval:1
                                      block:^{
                                        [weakSelf doSomething];
                                      }];

BACKGROUND

http://robnapier.net/blog/simple-gcd-timer-rntimer-762