How can I compare two dates, return a number of days

Question

how can I compare two dates return number of days. Ex: Missing X days of the Cup. look my code.

  NSDateFormatter *df = [[NSDateFormatter alloc]init];  
  [d         


        

Answer 1

You can use next category:

@interface NSDate (Additions)

-(NSInteger)numberOfDaysUntilDay:(NSDate *)aDate; 
-(NSInteger)numberOfHoursUntilDay:(NSDate *)aDate;

@end

@implementation NSDate (Additions)
const NSInteger secondPerMunite = 60;       
const NSInteger munitePerHour = 60;
const NSInteger hourPerDay = 24;

-(NSInteger)numberOfDaysUntilDay:(NSDate *)aDate 
{
    NSInteger selfTimeInterval = [aDate timeIntervalSinceDate:self];   
    return abs(selfTimeInterval / (secondPerMunite * munitePerHour * hourPerDay));    
}

-(NSInteger)numberOfHoursUntilDay:(NSDate *)aDate 
{
    NSInteger selfTimeInterval = [aDate timeIntervalSinceDate:self];
    return abs(selfTimeInterval / (secondPerMunite * munitePerHour));
}
@end