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@インターフェース

@interface Patient : NSObject <NSCoding>

@実装

- (id)initWithCoder:(NSCoder *)decoder{

    self.patientPhoto = [decoder decodeObjectForKey:kPatientPhoto];
    self.firstName = [decoder decodeObjectForKey:kFirstName];
    self.lastName = [decoder decodeObjectForKey:kLastName];
    self.age = [decoder decodeIntForKey:kAge];
    self.photoPaths = [decoder decodeObjectForKey:kPhotoPaths];
    self.photoDates = [decoder decodeObjectForKey:kPhotoDates];

    return self;

   }

- (void)encodeWithCoder:(NSCoder *)encoder{

        [encoder encodeObject:self.patientPhoto forKey:kPatientPhoto];
        [encoder encodeObject:self.firstName forKey:kFirstName];
        [encoder encodeObject:self.lastName forKey:kLastName];
        [encoder encodeInt:self.age forKey:kAge];
        [encoder encodeObject:self.photoPaths forKey:kPhotoPaths];
        [encoder encodeObject:self.photoDates forKey:kPhotoDates];

    }

別の実装では、PatientObjectをアーカイブしようとします。

     IMDataController* dataCtr = [IMDataController sharedDataController];

     Patient *currentPatient = [[Patient alloc]init];

     currentPatient.patientPhoto = self.photo.image;
     currentPatient.firstName = self.firstName.text;
     currentPatient.lastName = self.lastName.text;
     currentPatient.age = [self.lastName.text intValue];
     currentPatient.photoDates = nil;
     currentPatient.photoPaths = nil;

     NSString *patientNameForWriting = [self.firstName.text stringByAppendingString:self.lastName.text];

     NSString *stringToPatientObjectFile = [dataCtr createPatient:patientNameForWriting];

     NSFileManager* filemanager = [NSFileManager defaultManager];

    NSData *patientObjectArchived = [NSKeyedArchiver archivedDataWithRootObject:currentPatient];


     if([patientObjectArchived writeToFile:stringToPatientObjectFile atomically:YES]){


     }else{

         NSLog(@"Patient Object Didn't Archive");

     }

ifステートメント内の上記のメソッドはYESを返しません。データをnilと照合しましたが、エンコーダーの方法を確認しましたが、問題が見つかりません。NSStringファイルにデータを書き込んでいますPath：... / Documents / PatientName/PatientObject.archive。患者クラスのプロトコルにも準拠しています。

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2 に答える 2

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親ディレクトリが存在することを確認してください。私が覚えている限りwriteToFile:atomically:、ディレクトリ階層は自動的に作成されません。

于 2012-05-03T04:40:57.087 に答える
0

NSCoding 実装を次のものに置き換えます。

- (id)initWithCoder:(NSCoder *)decoder{
    if (self = [super initWithCoder:(NSCoder *) decoder]) 
    {
        self.patientPhoto = [decoder decodeObjectForKey:kPatientPhoto];
        self.firstName = [decoder decodeObjectForKey:kFirstName];
        self.lastName = [decoder decodeObjectForKey:kLastName];
        self.age = [decoder decodeIntForKey:kAge];
        self.photoPaths = [decoder decodeObjectForKey:kPhotoPaths];
        self.photoDates = [decoder decodeObjectForKey:kPhotoDates];
    }
    return self;

   }

- (void)encodeWithCoder:(NSCoder *)encoder{
        [super encodeWithCoder:encoder];
        [encoder encodeObject:self.patientPhoto forKey:kPatientPhoto];
        [encoder encodeObject:self.firstName forKey:kFirstName];
        [encoder encodeObject:self.lastName forKey:kLastName];
        [encoder encodeInt:self.age forKey:kAge];
        [encoder encodeObject:self.photoPaths forKey:kPhotoPaths];
        [encoder encodeObject:self.photoDates forKey:kPhotoDates];

 }

次に、次の行を変更します。

NSData *patientObjectArchived = [NSKeyedArchiver archivedDataWithRootObject:currentPatient];

と：

NSMutableData *patientObjectArchived = [NSMutableData data];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData: patientObjectArchived];
[archiver encodeObject:currentPatient forKey:@"someKey"];
[archiver finishEncoding];
于 2012-05-03T06:29:35.193 に答える