iOS中获取系统时间

来源：互联网发布：刘慈欣光荣与梦想知乎编辑：程序博客网时间：2024/05/19 23:28

// 获取系统当前时间

        NSDate * date = [NSDate date];        NSTimeInterval sec = [date timeIntervalSinceNow];        NSDate * currentDate = [[NSDate alloc] initWithTimeIntervalSinceNow:sec];                //设置时间输出格式：        NSDateFormatter * df = [[NSDateFormatter alloc] init ];        [df setDateFormat:@"yyyy年MM月dd日 HH小时mm分ss秒"];        NSString * na = [df stringFromDate:currentDate];                NSLog(@"系统当前时间为：%@",na);

 //获得系统日期        NSCalendar * cal=[NSCalendar currentCalendar];        NSUInteger unitFlags=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;        NSDateComponents * conponent= [cal components:unitFlags fromDate:senddate];        NSInteger year=[conponent year];        NSInteger month=[conponent month];        NSInteger day=[conponent day];        NSString * nsDateString= [NSString stringWithFormat:@"%4d年%2d月%2d日",year,month,day];
        NSLog(@"系统当前日期为：%@",nsDateString);

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