blocks|key|1023034|text|NSDateComponents|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1023035|您需要的所有内容都可以在这里找到：|1023036|https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/DatesAndTimes/Articles/dtCalendars.html|1023037|entityMap|0|LINK|mutability|MUTABLE|url^0|0|G|0|0|0|36|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|U|8|@]|D|@$9|V|A|W|1|X]]|E|$]]|$1|J|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|I]]]]

<code>NSDateComponents</code>

All you need can be found here: 
<a href="https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/DatesAndTimes/Articles/dtCalendars.html" rel="nofollow noreferrer">https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/DatesAndTimes/Articles/dtCalendars.html</a>

blocks|key|1023075|text|如果您只需要它来表示为字符串，那么下面的代码要容易得多|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1023076|NSDateFormatter+*formatter+=+[[NSDateFormatter+alloc]+init];
[formatter+setDateFormat:@"HH:mm"];

NSString+*startTimeString+=+[formatter+stringFromDate:startTimePicker.date];|code-block|syntax|javascript|1023077|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you only need it for presenting as a string the following code is much easier

<pre><code>NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"HH:mm"];

NSString *startTimeString = [formatter stringFromDate:startTimePicker.date];
</code></pre>

blocks|key|1237836|text|在我看来，这就是问题所在，不需要格式化程序：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1237837|NSDate+*date+=+[NSDate+date];
NSCalendar+*calendar+=+[NSCalendar+currentCalendar];
NSDateComponents+*components+=+[calendar+components:(NSCalendarUnitHour+%7C+NSCalendarUnitMinute)+fromDate:date];
NSInteger+hour+=+[components+hour];
NSInteger+minute+=+[components+minute];|code-block|syntax|javascript|1237838|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This seems to me to be what the question is after, no need for formatters:

<pre><code>NSDate *date = [NSDate date];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [calendar components:(NSCalendarUnitHour | NSCalendarUnitMinute) fromDate:date];
NSInteger hour = [components hour];
NSInteger minute = [components minute];
</code></pre>

blocks|key|1237894|text|如果您要使用C库，则可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1237895|time_t+t;
struct+tm+*+timeinfo;

time+(&t);
timeinfo+=+localtime+(&t);

NSLog(@"Hour:+%25d+Minutes:+%25d",+timeinfo->tm_hour,+timeinfo->tm_min);|code-block|syntax|javascript|1237896|并使用Swift：|1237897|var+t+=+time_t()
time(&t)
let+x+=+localtime(&t)

println("Hour:+\(x.memory.tm_hour)+Minutes:+\(x.memory.tm_min)")|1237898|有关进一步的指导，请参阅：http://www.cplusplus.com/reference/ctime/localtime/|offset|length|1237899|entityMap|0|LINK|mutability|MUTABLE|url|http://www.cplusplus.com/reference/ctime/localtime/^0|0|0|0|0|D|1F|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

If you were to use the C library then this could be done:

<pre><code>time_t t;
struct tm * timeinfo;

time (&amp;t);
timeinfo = localtime (&amp;t);

NSLog(@"Hour: %d Minutes: %d", timeinfo-&gt;tm_hour, timeinfo-&gt;tm_min);
</code></pre>

And using Swift:

<pre><code>var t = time_t()
time(&amp;t)
let x = localtime(&amp;t)

println("Hour: \(x.memory.tm_hour) Minutes: \(x.memory.tm_min)")
</code></pre>

For further guidance see: <a href="http://www.cplusplus.com/reference/ctime/localtime/" rel="nofollow">http://www.cplusplus.com/reference/ctime/localtime/</a>

blocks|key|1237970|text|Swift+2.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1237971|++++let+dateNow+=+NSDate()
++++let+calendar+=+NSCalendar.currentCalendar()
++++let+hour+=+calendar.component(NSCalendarUnit.Hour,+fromDate:+dateNow)
++++let+minute+=+calendar.component(NSCalendarUnit.Minute,+fromDate:+dateNow)
++++print(String(hour))
++++print(String(minute))|code-block|syntax|javascript|1237972|请注意print语句中的字符串类型转换，您可以轻松地将该值赋给变量，如下所示：|1237973|var+hoursString+=+String(hour)
var+minutesString+=+String(minute)|1237974|然后，您可以像这样连接这些值：|1237975|var+compoundString+=+"\(hour):\(minute)"
print(compoundString)|1237976|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Swift 2.0 

<pre><code> let dateNow = NSDate()
 let calendar = NSCalendar.currentCalendar()
 let hour = calendar.component(NSCalendarUnit.Hour, fromDate: dateNow)
 let minute = calendar.component(NSCalendarUnit.Minute, fromDate: dateNow)
 print(String(hour))
 print(String(minute))
</code></pre>

Please do take note of the cast to String in the print statement, you can easily assign that value to variables, like this:

<pre><code>var hoursString = String(hour)
var minutesString = String(minute)
</code></pre>

Then you can concatenate values like this:

<pre><code>var compoundString = "\(hour):\(minute)"
print(compoundString)
</code></pre>

blocks|key|1023288|text|在iOS+8中，苹果引入了一个助手方法来从NSDate对象中检索hour、minute、second和nanosecond。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1023289|Objective-C|1023290|NSDate+*date+=+[NSDate+currentDate];
NSInteger+hour+=+0;
NSInteger+minute+=+0;
NSCalendar+*currentCalendar+=+[NSCalendar+currentCalendar];
[currentCalendar+getHour:&hour+minute:&minute+second:NULL+nanosecond:NULL+fromDate:date];
NSLog(@"the+hour+is+%25ld+and+minute+is+%25ld",+(long)hour,+(long)minute);|code-block|syntax|javascript|1023291|斯威夫特|1023292|let+date+=+NSDate()
var+hour+=+0
var+minute+=+0
let+calendar+=+NSCalendar.currentCalendar()
if+#available(iOS+8.0,+*)+{
++++calendar.getHour(&hour,+minute:+&minute,+second:+nil,+nanosecond:+nil,+fromDate:+date)
++++print("the+hour+is+\(hour)+and+minute+is+\(minute)")
}|1023293|entityMap^0|W|4|11|6|18|6|1F|A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|R|$]]

With iOS 8, Apple introduced a helper method to retrieve the <code>hour</code>, <code>minute</code>, <code>second</code> and <code>nanosecond</code> from an NSDate object.

Objective-C

<pre><code>NSDate *date = [NSDate currentDate];
NSInteger hour = 0;
NSInteger minute = 0;
NSCalendar *currentCalendar = [NSCalendar currentCalendar];
[currentCalendar getHour:&amp;hour minute:&amp;minute second:NULL nanosecond:NULL fromDate:date];
NSLog(@"the hour is %ld and minute is %ld", (long)hour, (long)minute);
</code></pre>

Swift

<pre><code>let date = NSDate()
var hour = 0
var minute = 0
let calendar = NSCalendar.currentCalendar()
if #available(iOS 8.0, *) {
 calendar.getHour(&amp;hour, minute: &amp;minute, second: nil, nanosecond: nil, fromDate: date)
 print("the hour is \(hour) and minute is \(minute)")
}
</code></pre>

In my application I need to get the hour and minute separately:

<pre><code>NSString *currentHour=[string1 substringWithRange: NSMakeRange(0,2)];
 int currentHourInNumber=[currentHour intValue];
</code></pre>

Consider <code>string1</code> contains <code>11:59:13 AM</code> which is coming from datepicker.

Here if I use above code, it's okay to get hour if it's greater than 9. Else I need to change <code>NSMakeRange(0,1)</code> to get hour between 1 to 9.

Are there any methods to get the hour, minutes, etc?

Thanks in advance, please provide me sample code.

How do I get hour and minutes from NSDate?

Objective-C

Swift

在我的应用程序中，我需要分别获取小时和分钟：NSString *currentHour=[string1 substringWithRange: NSMakeRange(0,2)];        int currentHourInNumber=[currentHour intValue];考虑string1包含来自d...

问如何从NSDate获取小时和分钟？
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