Format a float value to get the digits before a decimal point

In my application I have a music player, which plays music with a length of 0:30 seconds.

However in a UILa开发者_开发百科bel I am currently displaying the progress, and as it is a float, the label is displaying i.e 14.765.

I would appreciate it if you could tell me how I could get the label to display

0:14 rather than 14.765.

Also, I would appreciate it if you could tell me how I could display 0:04 if the progress was 4seconds in.

This works properly:

float time = 14.765;

int mins = time/60;
int secs = time-(mins*60);

NSString * display = [NSString stringWithFormat:@"%d:%02d",mins,secs];

Results:

 14.765 => 0:14
 30.000 => 0:30
 59.765 => 0:59
105.999 => 1:45

EDIT

In addition the 'one liner':

float time = 14.765;
NSString * display = [NSString stringWithFormat:@"%d:%02d",(int)time/60,(int)time%60];  

You first need to convert your float to an integer, rounding as you wish. You can then use the integer division, /, and remainder, % operations to extract minutes and seconds and produce a string:

float elapsedTime = 14.765;
int wholeSeconds = round(elapsedTime); // or ceil (round up) or floor (round down/truncate)
NSString *time = [NSString stringWithFormat:@"%02d:%02d", wholeSeconds/60, wholeSeconds%60];

The %02d is the format specification for a 2-digits, zero padded, integer - look up printf in the docs for full details.

//%60 remove the minutes and int removes the floatingpoints
int seconds = (int)(14.765)%60;
// calc minutes
int minutes = (int)(14.765/60);
// validate if seconds have 2 digits
NSString time = [NSString stringWithFormat:@"%i:%02i",minutes,seconds];

that should work. Can't test it i'm on Win currently