objective-c - 使用自定义日期初始化 NSDate

Question

我正在寻找类似的东西:

NSDate *date = [[NSDate alloc] initWithYear:1984 month:10 Day:8];

有没有办法做这样的事情？

谢谢!

Answer 1

我为这个任务写了一个类别。 NSDate 缺少很多有用的方法。

@interface NSDate (missingFunctions) 
+ (NSDate *)dateWithYear:(NSInteger)year month:(NSInteger)month day:(NSInteger)day;
@end


@implementation NSDate (missingFunctions)

+ (NSDate *)dateWithYear:(NSInteger)year month:(NSInteger)month day:(NSInteger)day {
    NSCalendar *calendar = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
    NSDateComponents *components = [[[NSDateComponents alloc] init] autorelease];
    [components setYear:year];
    [components setMonth:month];
    [components setDay:day];
    return [calendar dateFromComponents:components];
}   
@end