27
2017
09

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;

}
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