[SOLVED] NSDateComponentsFormatter format to "mm:ss"

NSDateComponentsFormatter format to "mm:ss"

Im trying to format an NSTimeInterval to mm:ss and I want to preserve all the leading zeros, for example "00:34"

Im doing the following:

NSTimeInterval interval = 34.56;
NSDateComponentsFormatter *formatter = [[NSDateComponentsFormatter alloc] init];
formatter.allowedUnits = NSCalendarUnitMinute | NSCalendarUnitSecond;
formatter.zeroFormattingBehavior = NSDateComponentsFormatterZeroFormattingBehaviorPad;
NSString *string = [formatter stringFromTimeInterval:interval];
NSLog(@"%@", string);

But this is printing "0:34" and I need it to be "00:34"

Any Idea?

Solution

There is no built-in support for leading zeros for every component with NSDateComponentsFormatter.

But you can do such formatting manually:

NSTimeInterval interval = 34.56;
unsigned int seconds = (unsigned int)interval;
NSString *string = [NSString stringWithFormat:@"%02u:%02u", (seconds / 60) % 60, seconds % 60];
NSLog(@"%@", string);