최근에 내 iPhone 앱의 검색 결과를 NSUserDefaults 컬렉션에 저장하려고했습니다. 또한 이것을 사용하여 사용자 등록 정보를 성공적으로 저장하지만 어떤 이유로 사용자 지정 위치 클래스의 NSMutableArray를 저장하려고하면 항상 비어있게됩니다.
이 게시물에서 NSMutableArray를 NSData 요소로 변환하려고 시도했지만 동일한 결과를 얻었습니다 ( iPhone에서 NSUserDefaults를 사용하여 정수 배열을 저장할 수 있습니까? ).
내가 시도한 코드 샘플은 다음과 같습니다.
저장:
[prefs setObject:results forKey:@"lastResults"];
[prefs synchronize];또는
NSData *data = [NSData dataWithBytes:&results length:sizeof(results)];
[prefs setObject:data forKey:@"lastResults"];또는
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:results];
[prefs setObject:data forKey:@"lastResults"];하중:
lastResults = (NSMutableArray *)[prefs objectForKey:@"lastResults"];또는
NSData *data = [prefs objectForKey:@"lastResults"];
memcpy(&lastResults, data.bytes, data.length); 또는
NSData *data = [prefs objectForKey:@"lastResults"];
lastResults = [NSKeyedUnarchiver unarchiveObjectWithData:data];아래의 조언을 따르면 내 개체에 NSCoder를 구현했습니다 (임시 NSString의 남용 무시).
#import "Location.h"
@implementation Location
@synthesize locationId;
@synthesize companyName;
@synthesize addressLine1;
@synthesize addressLine2;
@synthesize city;
@synthesize postcode;
@synthesize telephoneNumber;
@synthesize description;
@synthesize rating;
@synthesize priceGuide;
@synthesize latitude;
@synthesize longitude;
@synthesize userLatitude;
@synthesize userLongitude;
@synthesize searchType;
@synthesize searchId;
@synthesize distance;
@synthesize applicationProviderId;
@synthesize contentProviderId;
- (id) initWithCoder: (NSCoder *)coder
{
if (self = [super init])
{
self.locationId = [coder decodeObjectForKey:@"locationId"];
self.companyName = [coder decodeObjectForKey:@"companyName"];
self.addressLine1 = [coder decodeObjectForKey:@"addressLine1"];
self.addressLine2 = [coder decodeObjectForKey:@"addressLine2"];
self.city = [coder decodeObjectForKey:@"city"];
self.postcode = [coder decodeObjectForKey:@"postcode"];
self.telephoneNumber = [coder decodeObjectForKey:@"telephoneNumber"];
self.description = [coder decodeObjectForKey:@"description"];
self.rating = [coder decodeObjectForKey:@"rating"];
self.priceGuide = [coder decodeObjectForKey:@"priceGuide"];
self.latitude = [coder decodeObjectForKey:@"latitude"];
self.longitude = [coder decodeObjectForKey:@"longitude"];
self.userLatitude = [coder decodeObjectForKey:@"userLatitude"];
self.userLongitude = [coder decodeObjectForKey:@"userLongitude"];
self.searchType = [coder decodeObjectForKey:@"searchType"];
self.searchId = [coder decodeObjectForKey:@"searchId"];
self.distance = [coder decodeObjectForKey:@"distance"];
self.applicationProviderId = [coder decodeObjectForKey:@"applicationProviderId"];
self.contentProviderId = [coder decodeObjectForKey:@"contentProviderId"];
}
}
- (void) encodeWithCoder: (NSCoder *)coder
{
[coder encodeObject:locationId forKey:@"locationId"];
[coder encodeObject:companyName forKey:@"companyName"];
[coder encodeObject:addressLine1 forKey:@"addressLine1"];
[coder encodeObject:addressLine2 forKey:@"addressLine2"];
[coder encodeObject:city forKey:@"city"];
[coder encodeObject:postcode forKey:@"postcode"];
[coder encodeObject:telephoneNumber forKey:@"telephoneNumber"];
[coder encodeObject:description forKey:@"description"];
[coder encodeObject:rating forKey:@"rating"];
[coder encodeObject:priceGuide forKey:@"priceGuide"];
[coder encodeObject:latitude forKey:@"latitude"];
[coder encodeObject:longitude forKey:@"longitude"];
[coder encodeObject:userLatitude forKey:@"userLatitude"];
[coder encodeObject:userLongitude forKey:@"userLongitude"];
[coder encodeObject:searchType forKey:@"searchType"];
[coder encodeObject:searchId forKey:@"searchId"];
[coder encodeObject:distance forKey:@"distance"];
[coder encodeObject:applicationProviderId forKey:@"applicationProviderId"];
[coder encodeObject:contentProviderId forKey:@"contentProviderId"];
}