从nsdictionary中获取日期并匹配它们

Question

我使用nsdictionary来存储日期。我正试图从我的测试案例中给出某些日期，并从字典中获取日期。比如说，我的字典有10个日期。我希望匹配3个日期，并且只从字典中得到这3个日期。我不能那样做。有人能告诉我怎么做吗?我得到了所有的10次约会，即使我试着得到3次约会。这里是我的codeif(([dd1 isEqualToDate:startDate] || [dd1 isEqualToDate:startDate]) &&([dd1 isEqualToDate:endDate] | [dd1 isEqualToDate:endDate])){
if ([startDate:dd1] &&[endDate earlierDate: dd1])

                   {    

                        //dd==startDate;
                        NSManagedObject *allnew = Nil;
                        NSManagedObjectContext *allone=[self managedObjectContext];            
                        NSEntityDescription *entity = [NSEntityDescription entityForName:@"Weather" inManagedObjectContext:allone];   
                        NSLog(@" The NEW ENTITY IS ALLOCATED AS entity is %@",entity);
                        WeatherXMLParser *delegate = [[WeatherXMLParser alloc] initWithCity:city state:state country:country];
                        NSXMLParser *locationParser = [[NSXMLParser alloc] initWithContentsOfURL:delegate.url];
                        [locationParser setDelegate:delegate];
                        [locationParser setShouldResolveExternalEntities:YES];
                        [locationParser parse];
                        NSFetchRequest *request = [[NSFetchRequest alloc] init];  
                        [request setEntity:entity]; 
                        predicate = [NSPredicate predicateWithFormat:
                                     @"city == %@ and state == %@ and country == %@  and date==%@ and date==%@", city, state, country,startDate,endDate];
                        [request setPredicate:predicate];
                        NSError *err;
                        NSUInteger count = [allone countForFetchRequest:request error:&err];
                        NSLog(@" minimum salary is %@",predicate);
                        // If a predicate was passed, pass it to the query
                        if(predicate !=NULL){
                            //[self deleteobject];
                        }
                        Weather *weather = (Weather *)[NSEntityDescription insertNewObjectForEntityForName:@"Weather" 
                                                                                    inManagedObjectContext:self.managedObjectContext];
                        weather.date = [fields objectForKey:@"date"];
                        weather.high =[fields objectForKey:@"high"];
                        weather.low = [fields objectForKey:@"low"];
                        weather.city =[fields objectForKey:@"city"];
                        weather.state =[fields objectForKey:@"state"];
                        weather.country =[fields objectForKey:@"country"];
                        NSString*icon=[fields objectForKey:@"icon"];
                        NSString *all=[icon lastPathComponent];
                        weather.condition = all;
                        [self saveContext]; 

我希望只得到2个日期，但我从nsdictionary得到所有4个元素。我正在从测试用例传递我的开始日期和结束日期，我正在使用nsxmlparser从谷歌天气api获取日期并将它们存储在nsdictionary中。我正在获取第一个日期并增加每个日期并存储它们。我的NSdictionary看起来像got {城市= #;condition = "基本晴天";国家= #;Date = "2011-08-11 05:00:00 +0000";"day_of_week" =星期四;高= 81;Icon = "/ig/images/weather/mostly_sunny.gif";低= 65;Startdate = "2011-08-11 05:00:00 +0000";State = #;

Answer 1

int count = 0;// global
 -(void)threeDateMatches(NSDate*)testCaseDate{
     for(NSDate* d1 in dateDictionary){
         if( [[dateComparisonFormatter stringFromDate:testCaseDate] isEqualToString:   [dateComparisonFormatter stringFromDate:d1]] ) {
               count = count+1;
               //save your d1 in another variable and that will give you three matches date
               //with your testCaseDate
         }
         if(count>3){
               break;
         }
 }

我刚刚给了你一个例子，没有通过运行来测试它。