计时器3:30分钟，其中有添加和跳过选项？

Sushrita 发表于 Dev

Sushrita

我是ios的新手，因此我需要帮助制作3:30分钟的计时器，该计时器具有添加和跳过两个选项，计时器到达00:00后将消失。请帮助我，我现在处于非常困难的境地。

这是计时器

-(void)updatelable:(NSTimer *)timer {

    remainingTime=180;

    for (int i=remainingTime;i==0 ;i--) {

        NSInteger minutes = floor(*(remainingTime))/ 60;
        remainingTime = remainingTime-(minutes*60);

        NSInteger seconds = remainingTime;

        second.text =[NSString stringWithFormat:@"%02ld",seconds];
        minute.text =[NSString stringWithFormat:@"%02ld",minutes];

        timerLabel.text = @"Time up!!";
    }

    [timer invalidate];
}

索拉布（Saurabh Prajapati）

试试这个

.h文件

{
    int counter;
    NSTimer timer;
}

在.m文件中

 - (void)viewDidLoad
 {
     counter = 210;//total Time
     timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(targetMethod:) userInfo:nil repeats:YES];        
 }


-(void)targetMethod:(NSTimer*)timr
{
     if(counter == 0)
     {
         [timer invalidate]
         //set label hidden here after 3:30 minutes
     }
     //strTime is string containing remaining time
     NSString *strTime = [self formatTimeFromSeconds:counter];
     counter--;
}

对于标签文本，请调用此方法

 -(NSString *)formatTimeFromSeconds:(int)numberOfSeconds
{
    int seconds = numberOfSeconds % 60;
    int minutes = (numberOfSeconds / 60) % 60;
    int hours = numberOfSeconds / 3600;
    //we have >=1 hour => example : 3h:25m
    if (hours)
        return [NSString stringWithFormat:@"%dh:%dm:%ds", hours, minutes, seconds];
    //we have 0 hours and >=1 minutes => example : 3m:25s
    if (minutes)
        return [NSString stringWithFormat:@"%dm:%ds", minutes, seconds];
    //we have only seconds example : 25s
    return [NSString stringWithFormat:@"%ds", seconds];
}

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