当我启动应用程序时如何恢复时间计数器值

Question

我想在我首先启动 app.like 时恢复时间计数器值我的 label 值比关闭应用程序后 05:00 但是当我再次启动应用程序时计时器开始计数 05:00。请帮助我

int timeSec,timeMin ; 
- (void)viewDidLoad {
    timeSec=0;
    timeMin=0;
    [self StartTimer];
}
-(void) StartTimer
{
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES];
    [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];


}

//Event called every time the NSTimer ticks.
- (void)timerTick:(NSTimer *)timer
{
    timeSec++;
    if (timeSec == 60)
    {
        timeSec = 0;
        timeMin++;
    }
    //Format the string 00:00
    NSString* timeNow = [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec];
    //Display on your label
    //[timeLabel setStringValue:timeNow];
    self.lbl_timer.text= timeNow;
}

//Call this to stop the timer event(could use as a 'Pause' or 'Reset')
- (void) StopTimer
{
   // [timer invalidate];
    timeSec = 0;
    timeMin = 0;
    //Since we reset here, and timerTick won't update your label again, we need to refresh it again.
    //Format the string in 00:00
    NSString* timeNow = [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec];
    //Display on your label
    // [timeLabel setStringValue:timeNow];
    self.lbl_timer.text= timeNow;
}

感谢提前..

Answer 1

在 appdelegate 文件中声明两个变量

1)NSUserDefaults *usedefaults; 2)@属性 (非原子,读写) int timeSec,timeMin,isBackground;

- (void)applicationDidEnterBackground:(UIApplication *)application 
{
     self.isBackground=1;
     usedefaults=[NSUserDefaults standardUserDefaults];
    [usedefaults setObject:[NSString stringWithFormat:@"%d",self.timeMin] forKey:@"timemin"];
    [usedefaults setObject:[NSString stringWithFormat:@"%d",self.timeSec] forKey:@"timesec"];
    NSLog(@"Enter in back value userdefault %@",usedefaults);
}

- (void)applicationWillEnterForeground:(UIApplication *)application {

    if(self.isBackground==1)
    {
        self.isBackground=0;
        self.timeMin=[[usedefaults objectForKey:@"timemin"] intValue];
        self.timeSec=[[usedefaults objectForKey:@"timesec"] intValue];
        NSLog(@"Foreground value min %d sec %d",self.timeMin,self.timeSec);
    }
}

In ViewDidload in your Timer startpage
app=(AppDelegate *)[[UIApplication sharedApplication] delegate];

最后只是将你 self.timemin 替换为 app.timemin 同样的时间秒。

干杯享受那肯定对你有用..

Answer 2

在 nsuserdefault

中尝试此 code.store 数据

- (void)viewDidLoad {

    timeSec=[[NSString stringWithFormat:@"%ld",(long)[[NSUserDefaults       standardUserDefaults]integerForKey:@"timeSec"]] intValue];
    timeMin=[[NSString stringWithFormat:@"%ld",(long)[[NSUserDefaults standardUserDefaults]integerForKey:@"timeMin"]] intValue];
    [self StartTimer];
}
-(void) StartTimer
{
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES];
    [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
    self.lbl_timer.text=@"00:00";

}
- (void)timerTick:(NSTimer *)timer
{
    timeSec++;
    if (timeSec == 60)
    {
        [locationManager startUpdatingLocation];
        timeSec = 0;
        timeMin++;
    }
    self.lbl_timer.text= [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec];;
}

当您返回屏幕时添加此 code.like 后退按钮或关闭按钮操作

[timer invalidate];
                                       [[NSUserDefaults standardUserDefaults]setInteger:timeSec forKey:@"timeSec"];
                                       [[NSUserDefaults standardUserDefaults]setInteger:timeMin forKey:@"timeMin"];

当我启动应用程序时如何恢复时间计数器值

how to resume time counter value in when i start the app

ios

objective-c

nstimer