Make a timer with ranking in Objective-C - ios

Question

I want a ranking in my app where you can see who has the fastest lap.
I try to convert the time into milliseconds, but it didn't work well.
This is my code at the moment.
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize watch,start,reset;
- (void)viewDidLoad {
[super viewDidLoad];
running = NO;
count = 0;
watch.text = #"00:00.00";
start.layer.cornerRadius = 45;
reset.layer.cornerRadius = 45;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (IBAction)startpressed:(id)sender {
if (running == NO) {
running = YES;
[start setTitle:#"STOPP" forState:UIControlStateNormal];
NSDate *watch = [NSDate dateWithTimeIntervalSince1970:(1273636800 / 1000.0)];
if (myTimer == nil) {
myTimer = [NSTimer scheduledTimerWithTimeInterval:0.0055
target:self
selector:#selector(updateTimer)
userInfo: nil
repeats:YES];
}
} else {
running = NO;
[myTimer invalidate];
myTimer = nil;
[start setTitle:#"START" forState:UIControlStateNormal];
}
}
- (IBAction)resetpressed:(id)sender {
running =NO;
[myTimer invalidate];
myTimer =nil;
[start setTitle:#"START" forState:UIControlStateNormal];
count = 0;
watch.text = #"00:00.00";
}
- (void)updateTimer {
count++;
int min = floor(count/100/60);
int sec = floor(count/100);
int mSec = count % 100;
if (sec >= 60) {
sec = sec % 60;
}
watch.text = [NSString stringWithFormat:#"%02d:%02d.%02d", min,sec,mSec];
}
#end
this is my ViewController.h code:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
{
NSTimer *myTimer;
BOOL running;
int count;
double methodStart;
}
#property (weak, nonatomic) IBOutlet UILabel *watch;
#property (weak, nonatomic) IBOutlet UIButton *start;
#property (weak, nonatomic) IBOutlet UIButton *reset;
#property (weak, nonatomic) IBOutlet UILabel *eins;
#property (weak, nonatomic) IBOutlet UILabel *zwei;
#property (weak, nonatomic) IBOutlet UILabel *drei;
- (IBAction)startpressed:(id)sender;
- (IBAction)resetpressed:(id)sender;
- (void) updateTimer;
#end

Answer 1

Create array for holding lap history in class interface/extension and initialise it.
self.lapHistory = [#[] mutableCopy];
Capture and sort every lap time when lap is reset/stopped
- (IBAction)resetpressed:(id)sender {
[self.lapHistory addObject:#(count)];
self.lapHistory = [self.lapHistory sortedArrayUsingSelector: #selector(compare:)];
}
Display sorted ranking from lapHistory
-(void)displayRanking{
NSMutableString *rankingResult = [[NSMutableString alloc] init];
for (NSNumber *lap in self.lapHistory) {
[rankingResult appendString:[NSString stringWithFormat:#"%ld\n",[lap integerValue]]];
}
NSLog(#"Ranking result is %#", rankingResult);
}