如何使用 NSDateFormatter 获取仅经过小时和分钟的完整时间戳？

发布于 2024-10-20 03:54:08 字数 650 浏览 5 评论 0原文

我认为这只是一个小问题。搜索了一段时间后我仍然无法弄清楚。希望你能。 :-)

我想获得今天的完整时间戳，包括自己的小时和分钟。我的方法如下（例如 dateStr 是 @"11:30"）：

NSDateFormatter *myFormatter = [[[NSDateFormatter alloc] init] autorelease];
[myFormatter setTimeZone:[NSTimeZone systemTimeZone]];
[myFormatter setDateFormat:@"HH:mm"];
NSDate *tmpDate = [myFormatter dateFromString:dateStr];
[myFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss ZZZ"];
...???

所以现在我得到

1970-01-01 11:30:00 +0000

我必须做什么才能将 dateStyle 应用于我的 NSDate 并获得今天的正确日期？我知道我可以使用 [NSDate date] 来获取实际日期，但我可以做什么来“操纵”分钟和小时？

如果能从你们那里得到一些帮助，那就太好了:)

原文

I think this is just a minor problem. After searching for some time I still can't figure it out. Hopefully you can. :-)

I want to get a full timestamp of today, passing own hours and minutes.
My approach was the following(dateStr is @"11:30" for example):

NSDateFormatter *myFormatter = [[[NSDateFormatter alloc] init] autorelease];
[myFormatter setTimeZone:[NSTimeZone systemTimeZone]];
[myFormatter setDateFormat:@"HH:mm"];
NSDate *tmpDate = [myFormatter dateFromString:dateStr];
[myFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss ZZZ"];
...???

So now I get

1970-01-01 11:30:00 +0000

What do I habe to do to apply the dateStyle to my NSDate and get the correct date of today?
I know that I can use [NSDate date] to get the actual date but what can I do to "manipulate" only minutes and hours?

Would be great to get some help from you guys :)

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把昨日还给我 2024-10-27 03:54:08

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

NSDateComponents *components = [gregorian components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:[NSDate date]];
[components setHour:hour];
[components setMinute:minute];
NSDate *date = [gregorian dateFromComponents:components];

[gregorian release];

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

NSDateComponents *components = [gregorian components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:[NSDate date]];
[components setHour:hour];
[components setMinute:minute];
NSDate *date = [gregorian dateFromComponents:components];

[gregorian release];

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