Question

比较两个日期（currentDate和_timerStartDate）后，我得到以下输出

nstimeinterval: 88.998212
2014-05-14 14:07:08.284  currentDate: 14-05-2014 14:07:08
2014-05-14 14:07:08.284  stopDate: 14-05-2014 14:05:39
2014-05-14 14:07:08.284  hour: 10

这是正确和预期的。然而，当我打破timerDate时，我从NSLog获得了10个小时......我期待零。我做错了什么？

这是我的代码：

NSDate *currentDate = [NSDate date];
NSTimeInterval timeInterval = [currentDate timeIntervalSinceDate:_timerStartDate];
NSDate *timerDate = [NSDate dateWithTimeIntervalSince1970:timeInterval];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"mm:ss"];
NSString *timeString=[dateFormatter stringFromDate:timerDate];


NSLog(@"nstimeinterval: %f", timeInterval);

[dateFormatter setDateFormat:@"dd-MM-yyyy HH:mm:ss"];

NSLog(@"currentDate: %@", [dateFormatter stringFromDate:currentDate]);
NSLog(@"stopDate: %@", [dateFormatter stringFromDate:_timerStartDate]);


NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [calendar components: ( NSHourCalendarUnit | NSYearCalendarUnit) fromDate:timerDate];
NSLog(@"year: %li", (long)components.year);


NSLog(@"timer: %@", timeString);

timerTicksForCounter = timeString;

NSLog(@"hour: %li", (long)components.hour);

Answer 1

你真正想要完成的是什么？使用两个日期之间的时间填充NSDateComponents？在这种情况下，您可能需要-[NSCalendar components:fromDate:toDate:options:]，其中起始日期为开始日期，最新日期为您停止时的当前日期。与此同时，您似乎在进行大量复杂且可能不必要的日期混搭。

从NSDateComponents获取意外输出

1 个答案: