Question

I’m getting weird behavior out of [NSDate timeIntervalSinceReferenceDate].

I have the following function:

-(void) insertRow{
NSTimeInterval timeNow = [NSDate timeIntervalSinceReferenceDate];
if (timeNow - secondsSinceTableViewScroll <0.5){
    [self insertRow];
    return;
}

NSIndexSet *indexSet = [NSIndexSet indexSetWithIndex:[self.itemsToFollow count] - 1];
[self.tableView insertSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic];
}

which is a callback from an ASIHTTPRequest requestFinished.If I put a breakpoint in the code, it works fine. If I just try to run the code, I get an exc_bad_access on the line:

NSTimeInterval timeNow = [NSDate timeIntervalSinceReferenceDate];

secondsSinceTableViewScroll is an ivar declared in the header and set like this:

 secondsSinceTableViewScroll = [NSDate timeIntervalSinceReferenceDate];

Any ideas why I’m getting the exc_bad_access when there is no breakpoint?

Thanks

Only thing I could find

I was checking the time like this:

-(void) insertRow{
end = [NSDate timeIntervalSinceReferenceDate];
if(end-start < 0.05){
    [self insertRow];
    return;
}

NSIndexSet *indexSet = [NSIndexSet indexSetWithIndex:[self.itemsToFollow count] - 1];
[self.tableView insertSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic];
}

I’m sure somewhere it says you can’t have back to back calls of timeIntervalSinceReferenceDate and that’s why it was crashing (this kind of recursive loop was a pretty bad idea anyways).

So use a while loop, or better yet an NSTimer.

Thanks for the help though

Answer 1

Change

[self insertRow];

to

[self performSelector:@selector(insertRow) withObject:nil afterDelay:0];