在xcode中统计时间差中的Leap年天数
在xcode中统计时间差中的Leap年天数
提问于 2012-05-17 02:44:18
我正在尝试为一个可以追溯到19世纪的应用程序确定两个不同日期之间的闰年天数-这是一个方法示例：
-(NSInteger)leapYearDaysWithinEraFromDate:(NSDate *) startingDate toDate:(NSDate *) endingDate {
// this is for testing - it will be changed to a datepicker object
NSDateComponents *startDateComp = [[NSDateComponents alloc] init];
[startDateComp setSecond:1];
[startDateComp setMinute:0];
[startDateComp setHour:1];
[startDateComp setDay:14];
[startDateComp setMonth:4];
[startDateComp setYear:2005];
NSCalendar *GregorianCal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
//startDate declared in .h//
startDate = [GregorianCal dateFromComponents:startDateComp];
NSLog(@"This program's start date is %@", startDate);
NSDate *today = [NSDate date];
NSUInteger unitFlags = NSDayCalendarUnit;
NSDateComponents *temporalDays = [GregorianCal components:unitFlags fromDate:startDate toDate:today options:0];
NSInteger days = [temporalDays day];
// then i will need code for the number of leap year Days
return 0;//will return the number of 2/29 days
}所以我有两个日期之间的总天数。现在我需要减去闰年天数？
PS -我知道在这个例子中有两个闰年，但这个应用程序将追溯到19世纪……
Stack Overflow用户
发布于 2015-06-08 15:57:15
对于Swift
func getLeapCount(startDate : NSDate , endDate : NSDate)-> Int{
var intialDate = startDate
var dateComponent = NSDateComponents()
dateComponent.day = 1
var leapCount = 0;
var currentCalendar = NSCalendar.currentCalendar()
while (intialDate.compare(endDate) == NSComparisonResult.OrderedAscending) {
intialDate = currentCalendar.dateByAddingComponents(dateComponent, toDate: intialDate, options: NSCalendarOptions.allZeros)!
if self.isLeapYear(startDate){
++leapCount
}
}
return leapCount
}
func isLeapYear (year : NSDate )-> Bool{
let cal = NSCalendar.currentCalendar()
let year = cal.component(NSCalendarUnit.CalendarUnitYear, fromDate: year)
return (( year%100 != 0) && (year%4 == 0)) || year%400 == 0;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/10624696
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