Objective-C 中的时间段
在做一个小项目时，我收到了一些 Java 代码，我应该将它们重写为 Objective-C（准确地说是 iPhone）。我遇到了这段代码：
public class Period {
private org.joda.time.Period jodaPeriod;
public Period(org.joda.time.Period jodaPeriod) {
Validate.isTrue(PeriodType.standard().equals(jodaPeriod.getPeriodType()),
"The jodaPeriod argument must be a standard type period");
this.jodaPeriod = jodaPeriod;
}
public Period(int months) {
this(new org.joda.time.Period(months / 12, months % 12, 0, 0, 0, 0, 0, 0));
}
public Period(int years, int months) {
this(new org.joda.time.Period(years, months, 0, 0, 0, 0, 0, 0));
}
//some other code
}
经过快速研究，我了解了 JodaTime period 的基础知识，但我仍然不知道如何在 Objective-C 中做到这一点。我读过有关 CMTime 的内容，但这并不是我真正想要的。
谢谢，任何帮助将不胜感激。 :)
Doing a small project I have received some Java code that I should rewrite into Objective-C(for iPhone to be precise). I came across this piece of code:
public class Period {
private org.joda.time.Period jodaPeriod;
public Period(org.joda.time.Period jodaPeriod) {
Validate.isTrue(PeriodType.standard().equals(jodaPeriod.getPeriodType()),
"The jodaPeriod argument must be a standard type period");
this.jodaPeriod = jodaPeriod;
}
public Period(int months) {
this(new org.joda.time.Period(months / 12, months % 12, 0, 0, 0, 0, 0, 0));
}
public Period(int years, int months) {
this(new org.joda.time.Period(years, months, 0, 0, 0, 0, 0, 0));
}
//some other code
}
After a quick research I got the basics of the JodaTime period, but I still don't know how to do that in Objective-C. I've read about CMTime, but it's not really what I was looking for.
Thank you, any help would be greatly appreciated. :)
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我不完全确定你想用它做什么，但你会想看看：
NSCalendar
<一href="https://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/NSDateComponents_Class/Reference/Reference.html" rel="nofollow">NSDateComponent
<一href="https://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/NSDate_Class/Reference/Reference.html" rel="nofollow">NSDate
如果您给出有关您实际想要实现的目标的更多信息，我们可以解释您如何使用它们。
I'm not entirely sure what you're trying to use this for, but you'll want to look at:
NSCalendar
NSDateComponents
NSDate
If you give more information about what you're actually trying to achieve, we can explain how you'd use these.