tabview每个cell上放一个计时器

后台获取的Model数据中时间秒数second存放在字典里，用indexPath做key值

-(UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

NSDictionary *dic = @{@"indexPath":[NSString stringWithFormat:@"%ld",indexPath.row],@"lastTime": model.second};    [_array addObject:dic];    NSLog(@"----%ld----",_array.count);    //调用定时器    [self startTimer];

#pragma mark 定时器开启- (void)startTimer{    if (!self.timer) {        self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(refreshLessTime) userInfo:nil repeats:YES];        //如果不添加下面这条语句，在UITableView拖动的时候，会阻塞定时器的调用        [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:UITrackingRunLoopMode];    }}

- (void)refreshLessTime{    NSUInteger time;    for (int i = 0; i < _array.count; i++) {        time = [[[_array objectAtIndex:i] objectForKey:@"lastTime"]integerValue];        NSLog(@"%ld",time);        NSIndexPath *indexPath = [NSIndexPath indexPathForItem:[[[_array objectAtIndex:i] objectForKey:@"indexPath"] integerValue] inSection:0];        LXOrderingTableViewCell *cell = (LXOrderingTableViewCell *)[_tableView cellForRowAtIndexPath:indexPath];        cell.labPersistTime.text = [NSString stringWithFormat:@"%@",[self lessSecondToDay:++time]];        NSDictionary *dic = @{@"indexPath": [NSString stringWithFormat:@"%ld",indexPath.row],@"lastTime": [NSString stringWithFormat:@"%ld",time]};        [_array replaceObjectAtIndex:i withObject:dic];    }}- (NSString *)lessSecondToDay:(NSUInteger)seconds{    //秒化成 时分秒 显示    NSUInteger hour = (NSUInteger)(seconds/3600);    NSUInteger min  = (NSUInteger)(seconds%(3600))/60;    NSUInteger second = (NSUInteger)(seconds%60);    NSString *time = [NSString stringWithFormat:@"%lu小时%lu分钟%lu秒",(unsigned long)hour,(unsigned long)min,(unsigned long)second];    return time;}