将NSDate拆分为年月日期

Question

如果我有一个像04-30-2006这样的日期,我怎么能分开并获得月,日和年

还有什么比较岁月的直接方法吗？

Answer 1

你必须使用NSDateComponents.像这样:

NSDate *date = [NSDate date];
NSUInteger componentFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit;
NSDateComponents *components = [[NSCalendar currentCalendar] components:componentFlags fromDate:date];
NSInteger year = [components year];
NSInteger month = [components month];
NSInteger day = [components day];

还有什么比较岁月的直接方法吗？

没有内置.但你可以为它写一个类别.像这样:

@interface NSDate (YearCompare)
- (BOOL)yearIsEqualToDate:(NSDate *)compareDate;
@end

@implementation NSDate (YearCompare)

- (BOOL)yearIsEqualToDate:(NSDate *)compareDate {
    NSDateComponents *myComponents = [[NSCalendar currentCalendar] components:NSYearCalendarUnit fromDate:self];
    NSDateComponents *otherComponents = [[NSCalendar currentCalendar] components:NSYearCalendarUnit fromDate:compareDate];
    if ([myComponents year] == [otherComponents year]) {
        return YES;
    }
    return NO;
}

@end