Ios 制作一个在Objective-C中排名的计时器

我想在我的应用程序中排名，你可以看到谁跑得最快。 我试图将时间转换成毫秒，但效果不好

这是我目前的代码

#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

这是我的ViewController.h代码：

#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

#导入
@界面ViewController:UIViewController
{
NSTimer*myTimer；
布尔跑；
整数计数；
双方法启动；
}
@属性（弱，非原子）IBUILabel*手表；
@属性（弱，非原子）IBUIButton*启动；
@属性（弱，非原子）按钮*重置；
@属性（弱、非原子）IBUILabel*EIN；
@性质（弱，非原子）IBUILabel*zwei；
@性质（弱，非原子）IBUILabel*drei；
-（iAction）startpressed:（id）发送方；
-（iAction）重置按下：（id）发送方；
-（void）updateTimer；
@结束

在类接口/扩展中创建用于保存搭接历史的数组，并对其进行初始化

self.lapHistory = [@[] mutableCopy];

当圈重设/停止时，捕获并排序每圈时间

- (IBAction)resetpressed:(id)sender {
   [self.lapHistory addObject:@(count)];
   self.lapHistory = [self.lapHistory sortedArrayUsingSelector: @selector(compare:)];
}

显示从历史中排序的排名

-(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);
}

---

面临的问题是什么？如果你想在你的应用程序中显示前三名，制作一个NSMutableArray并在每个停止计时器中向可变数组添加项目（时间圈）。然后在对数组排序后显示第一条、第二条和第三条记录。就这些。你能给我密码吗？这样我就可以把它复制到我的密码里了？