iphone - Iphoneで現在の年が閏年かどうかを調べる方法

Question

Objective-Cで現在の年を取得するNSDate方法と、その年がうるう年かどうかを調べる方法は?

Answer 1

ウィキペディア:

if year is divisible by 400 then
   is_leap_year
else if year is divisible by 100 then
   not_leap_year
else if year is divisible by 4 then
   is_leap_year
else
   not_leap_year

Answer 2

 NSDate *date = [NSDate date];
    NSLog(@"dat eis %@",date);

    NSDateFormatter *dateF = [[NSDateFormatter alloc]init];
    [dateF setDateFormat:@"YYYY"];
    NSString *dateS = [dateF stringFromDate:date ];
    NSLog(@"date is %@",dateS);

    int myInt = [dateS intValue];

    if(myInt%4== 0)

    {
        NSLog(@"Its a leap year ");
    }
    else{
        NSLog(@"Not A leap year");
    }