Simple Stopwatch Question

iloveisrael · 08-09-2010, 07:42 PM

Hey guys,
I've been trying to create a stopwatch, and it's all going good except for the way I format my string.

I want the timer to display the time like this: "00:00:00" (hrs:mins:secs).
I tried this: "[NSString stringWithFormat:@"%d:%d:%d", hrs, mins, secs];", but it displays it at "0:0:0".

Does anyone know how to display the time as I want it?

Thanks so much!!

Duncan C · 08-09-2010, 07:53 PM

Quote:

Originally Posted by iloveisrael

Hey guys,
I've been trying to create a stopwatch, and it's all going good except for the way I format my string.

I want the timer to display the time like this: "00:00:00" (hrs:mins:secs).
I tried this: "[NSString stringWithFormat:@"%d:%d:%d", hrs, mins, secs];", but it displays it at "0:0:0".

Does anyone know how to display the time as I want it?

Thanks so much!!

You want

Code:

[NSString stringWithFormat:@"%2d:%2d:%2d", hrs, mins, secs];

RLScott · 08-09-2010, 08:11 PM

Quote:

Originally Posted by Duncan C

You want

Code:

[NSString stringWithFormat:@"%2d:%2d:%2d", hrs, mins, secs];

But it would be even better with @"%02d:%02d:%02d" as the format.

Duncan C · 08-09-2010, 08:29 PM

Quote:

Originally Posted by RLScott

But it would be even better with @"%02d:%02d:%02d" as the format.

Oops. That's what I meant to type. Thanks for catching that.

iloveisrael · 08-09-2010, 09:51 PM

You guys are awesome!!

Thank you!!!!!!

abhimanipal · 08-09-2010, 10:47 PM

Quick question what is the difference between the 3 formats ?Could you give me a small exampe ?

iloveisrael · 08-09-2010, 11:15 PM

Quote:

Originally Posted by abhimanipal

Quick question what is the difference between the 3 formats ?Could you give me a small exampe ?

All I know is that:
@"%d:%d:%d" = "0:0:0"
@"%2d:%2d:%2d" = " 0: 0: 0"
@"%02d:%02d:%02d" = "00:00:00"

The only question I have is: why?
What's the syntax for these types of things? I've seen also people writing @"%0.0f" and stuff like that, but I could never distinguish between the differences...

Thanks!

RLScott · 08-10-2010, 05:13 AM

Quote:

Originally Posted by iloveisrael

All I know is that:
@"%d:%d:%d" = "0:0:0"
@"%2d:%2d:%2d" = " 0: 0: 0"
@"%02d:%02d:%02d" = "00:00:00"

The only question I have is: why?
What's the syntax for these types of things? I've seen also people writing @"%0.0f" and stuff like that, but I could never distinguish between the differences...

Thanks!

Google "printf format specifiers"

Ice_2k · 08-10-2010, 08:02 AM

%02d = at least 2 digits, if less than two then add 0 at the beginning