NSTimer Category + Blocks implementation to replace selector

Question

I am quite new to blocks and objective-c, and i am trying to write my first category using both. My idea is to create a category on NSTimer that will receive a block as a pa

Answer 1

What about leveraging userInfo to carry your block? (this is done with ARC)

void (^callback)(void) = ^{
    NSLog(@"do stuff");
}

NSTimer *timer = [NSTimer timerWithTimeInterval:10.0 target:self selector:@selector(handleTimeout:) userInfo:[NSDictionary dictionaryWithObject:[callback copy] forKey:@"block"] repeats:NO];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];

And then add the static selector of:

+ (void)handleTimeout:(NSTimer *)timer
{
    void (^callback)(void) = [timer.userInfo objectForKey:@"block"];
    callback();

    [timer invalidate];
    timer = nil;
};