I have a NSDate variable. From that variable, how I can show a stopwatch that continuously updates in the view?
I've tried [NSTimer scheduledTimerWithTimeInterval]
but can't get it working but also doubt that is the ideal way to do that.
Try this
- (void)updateTimer
{
static NSInteger counter = 0;
[stopWatchLabel setText:[NSString stringWithFormat:@"Counter: %i", counter++]];
}
- (IBAction)onStartPressed:(id)sender {
startDate = [[NSDate date]retain];
// Create the stop watch timer that fires every 10 ms
stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/10.0
target:self
selector:@selector(updateTimer)
userInfo:nil
repeats:YES];
}
You have to connect the IBAction to a button, and the stopWatchLabel to a UILabel in the interface builder.