Getting the time between touchesBegan and touchesEnded

C4WorkSpace

#import "C4WorkSpace.h"

@implementation C4WorkSpace {
    NSDate *timeButtonWasPressed, *timeButtonWasReleased;
}

-(void)touchesBegan {
    timeButtonWasPressed = [NSDate dateWithTimeIntervalSinceNow:0.0f];
}

-(void)touchesEnded {
    timeButtonWasReleased = [NSDate dateWithTimeIntervalSinceNow:0.0f];
    NSTimeInterval t = [timeButtonWasReleased timeIntervalSinceDate:timeButtonWasPressed];
    C4Log(@"%f",t);
}